Climate change includes both the global warming driven by human emissions of greenhouse gases, and the resulting large-scale shifts in weather patterns. Though there have been previous periods of climatic change, since the mid-20th century the rate of human impact on Earth's climate system and the global scale of that impact have been unprecedented.
That human activity has caused climate change is not disputed by any scientific body of national or international standing. The largest driver has been the emission of greenhouse gases, of which more than 90% are carbon dioxide (CO
2) and methane. Fossil fuel burning for energy consumption is the main source of these emissions, with additional contributions from agriculture, deforestation, and industrial processes. Temperature rise is accelerated or tempered by climate feedbacks, such as loss of sunlight-reflecting snow and ice cover, increased water vapour (a greenhouse gas itself), and changes to land and ocean carbon sinks.
Because land surfaces heat faster than ocean surfaces, deserts are expanding and heat waves and wildfires are more common. Surface temperature rise is greatest in the Arctic, where it has contributed to melting permafrost, and the retreat of glaciers and sea ice. Increasing atmospheric energy and rates of evaporation cause more intense storms and weather extremes, which damage infrastructure and agriculture. Rising temperatures are limiting ocean productivity and harming fish stocks in most parts of the globe. Current and anticipated effects from undernutrition, heat stress and disease have led the World Health Organization to declare climate change the greatest threat to global health in the 21st century. Environmental effects include the extinction or relocation of many species as their ecosystems change, most immediately in coral reefs, mountains, and the Arctic. Even if efforts to minimize future warming are successful, some effects will continue for centuries, including rising sea levels, rising ocean temperatures, and ocean acidification from elevated levels of CO
Many of these effects are already observed at the current level of warming, which is about 1.1 °C (2.0 °F). The Intergovernmental Panel on Climate Change (IPCC) has issued a series of reports that project significant increases in these impacts as warming continues to 1.5 °C (2.7 °F) and beyond. Under the Paris Agreement, nations agreed to keep warming "well under 2.0 °C (3.6 °F)" by reducing greenhouse gas emissions. However, under those pledges, global warming would reach about 2.8 °C (5.0 °F) by the end of the century, and current policies will result in about 3.0 °C (5.4 °F) of warming. Limiting warming to 1.5 °C (2.7 °F) would require halving emissions by 2030, then reaching near-zero levels by 2050.
Mitigation efforts include the research, development, and deployment of low-carbon energy technologies, enhanced energy efficiency, policies to reduce fossil fuel emissions, reforestation, and forest preservation. Climate engineering techniques, most prominently solar radiation management and carbon dioxide removal, have substantial limitations and carry large uncertainties. Societies and governments are also working to adapt to current and future global-warming effects through improved coastline protection, better disaster management, and the development of more resistant crops.
Observed temperature rise
Multiple independently produced instrumental datasets show that the climate system is warming, with the 2009–2018 decade being 0.93 ± 0.07 °C (1.67 ± 0.13 °F) warmer than the pre-industrial baseline (1850–1900). Currently, surface temperatures are rising by about 0.2 °C (0.36 °F) per decade. Since 1950, the number of cold days and nights has decreased, and the number of warm days and nights has increased. Historical patterns of warming and cooling, like the Medieval Climate Anomaly and the Little Ice Age, were not as synchronous across regions as current warming, but may have reached temperatures as high as those of the late-20th century in a limited set of regions. There have been prehistorical episodes of global warming, such as the Paleocene–Eocene Thermal Maximum. However, the observed rise in temperature and CO
2 concentrations has been so rapid that even abrupt geophysical events that took place in Earth's history do not approach current rates.
Climate proxy records show that natural variations offset the early effects of the Industrial Revolution, so there was little net warming between the 18th century and the mid-19th century. The Intergovernmental Panel on Climate Change (IPCC) has adopted the baseline reference period 1850–1900 as an approximation of pre-industrial global mean surface temperature, when thermometer records began to provide global coverage.
While the common measure of global warming is near-surface atmospheric temperature changes, those measurements are reinforced with a wide range of other types of observations. There has been an increase in the frequency and intensity of heavy precipitation, melting of snow and land ice, and increased atmospheric humidity. Flora and fauna are also behaving in a manner consistent with warming; for instance, plants are flowering earlier in spring. Another key indicator is the cooling of the upper atmosphere, which demonstrates that greenhouse gases are trapping heat near the Earth's surface and preventing it from radiating into space.
Although record-breaking years attract considerable media attention, individual years are less significant than the longer global temperature trend. An example of a shorter episode is the slower rate of surface temperature increase from 1998 to 2012, which was labeled the "global warming hiatus". Throughout this period, ocean heat storage continued to progress steadily upwards, and in subsequent years, surface temperatures have spiked upwards. The slower pace of warming can be attributed to a combination of natural fluctuations, reduced solar activity, and increased reflection of sunlight by particles from volcanic eruptions.
Global warming refers to global averages, with the amount of warming varying by region. Patterns of warming are independent of the locations of greenhouse gas emissions, because the gases persist long enough to diffuse across the planet; however, localized black carbon deposits on snow and ice do contribute to Arctic warming.
Since the pre-industrial period, global average land temperatures have increased almost twice as fast as global average surface temperatures. This is because of the larger heat capacity of oceans, and because oceans lose more heat by evaporation. Over 90% of the additional energy in the climate system over the last 50 years has been stored in the ocean, warming it. The remainder of the additional energy has melted ice and warmed the continents and the atmosphere. The ocean heat uptake drives thermal expansion which has contributed to observed sea level rise.
The Northern Hemisphere and North Pole have warmed much faster than the South Pole and Southern Hemisphere. The Northern Hemisphere not only has much more land, but also more snow area and sea ice, because of how the land masses are arranged around the Arctic Ocean. As these surfaces flip from reflecting a lot of light to being dark after the ice has melted, they start absorbing more heat. The Southern Hemisphere already had little sea ice in summer before it started warming. Arctic temperatures have increased and are predicted to continue to increase during this century at over twice the rate of the rest of the world. Melting of glaciers and ice sheets in the Arctic disrupts ocean circulation, including a weakened Gulf Stream, causing increased warming in some areas.
Physical drivers of recent climate change
By itself, the climate system experiences various cycles which can last for years (such as the El Niño–Southern Oscillation) to decades or centuries. Other changes are caused by an imbalance of energy that is "external" to the climate system, but not always external to the Earth. Examples of external forcings include changes in the composition of the atmosphere (e.g. increased concentrations of greenhouse gases), solar luminosity, volcanic eruptions, and variations in the Earth's orbit around the Sun.
Attribution of climate change is the effort to scientifically show which mechanisms are responsible for observed changes in Earth's climate. To determine anthropogenic attribution, known internal climate variability and natural external forcings need to be ruled out. Therefore, a key approach is to use computer modelling of the climate system to determine unique "fingerprints" for all potential causes. By comparing these fingerprints with observed patterns and evolution of climate change, and the observed history of the forcings, the causes of the observed changes can be determined. For example, solar forcing can be ruled out as major cause because its fingerprint is warming in the entire atmosphere, and only the lower atmosphere has warmed, which is what is expected from greenhouse gases (which trap heat energy radiating from the surface). Attribution of recent climate change shows that the primary cause is greenhouse gases, and secondarily land-use changes, and aerosols and soot.
The Earth absorbs sunlight, then radiates it as heat. Some of this infrared radiation is absorbed by greenhouse gases in the atmosphere, and because they re-emit it in all directions part of the heat is trapped on Earth instead of escaping into space. Before the Industrial Revolution, naturally-occurring amounts of greenhouse gases caused the air near the surface to be about 33 °C (59 °F) warmer than it would have been in their absence. Without the Earth's atmosphere, the Earth's average temperature would be well below the freezing point of water. While water vapour (~50%) and clouds (~25%) are the biggest contributors to the greenhouse effect, they increase as a function of temperature and are therefore considered feedbacks. On the other hand, concentrations of gases such as CO
2 (~20%), ozone and nitrous oxide are not temperature-dependent, and are hence considered external forcings. Ozone acts as a greenhouse gas in the lowest layer of the atmosphere, the troposphere (as opposed to the stratospheric ozone layer). Furthermore, ozone is highly reactive and interacts with other greenhouse gases and aerosols.
Human activity since the Industrial Revolution, mainly extracting and burning fossil fuels (coal, oil, and natural gas), has increased the amount of greenhouse gases in the atmosphere. These increases in levels of gases such as CO
2, methane, tropospheric ozone, CFCs, and nitrous oxide have increased radiative forcing. In 2018, the concentrations of CO
2 and methane had increased by about 45% and 160%, respectively, since 1750. In 2013, CO2 readings taken at the world's primary benchmark site in Mauna Loa surpassed 400 ppm for the first time (normal pre-industrial levels were ~270ppm). These CO
2 levels are much higher than they have been at any time during the last 800,000 years, the period for which reliable data have been collected from air trapped in ice cores. Less direct geological evidence indicates that CO
2 values have not been this high for millions of years.
Global anthropogenic greenhouse gas emissions in 2018, excluding those from land use change, were equivalent to 52 billion tonnes of CO
2. Of these emissions, 72% was CO
2, 19% was methane, 6% was nitrous oxide, and 3% was fluorinated gases. CO
2 emissions primarily come from burning fossil fuels to provide usable light and heat energy for transport, manufacturing, heating, and grid electricity. Additional CO
2 emissions come from deforestation and industrial processes, which include the CO
2 released by the chemical reactions for making cement, steel, aluminum, and fertilizer. Methane emissions come from livestock, manure, rice cultivation, landfills, wastewater, coal mining, as well as oil and gas extraction. Nitrous oxide emissions largely come from the microbial decomposition of inorganic and organic fertilizer.
From a consumption standpoint, the dominant sources of global 2010 emissions were: food and human waste (34%), thermal comfort, washing, and lighting (26%); freight, travel, commuting, and communication (25%); and building construction (15%). These emissions take into account the embodied fossil fuel energy in manufacturing materials including metals (e.g. steel, aluminum), concrete, glass, and plastic, which are largely used in buildings, infrastructure, and transportation. From a production standpoint, the primary sources of global greenhouse gas emissions are estimated as: electricity and heat (25%), agriculture and forestry (24%), industry and manufacturing (21%), transport (14%), and buildings (6%).
Despite the contribution of deforestation to greenhouse gas emissions, the Earth's land surface, particularly its forests, remain a significant carbon sink for CO
2. Natural processes, such as carbon fixation in the soil and photosynthesis, more than offset the greenhouse gas contributions from deforestation. The land-surface sink is estimated to remove about 11 billion tonnes of CO
2 annually from the atmosphere, or about 29% of global CO
2 emissions. The ocean also serves as a significant carbon sink via a two-step process. First, CO
2 dissolves in the surface water. Afterwards, the ocean's overturning circulation distributes it deep into the ocean's interior, where it accumulates over time as part of the carbon cycle (changing the ocean's chemistry). Over the last two decades, the world's oceans have absorbed 20 to 30% of emitted CO
2. The strength of both the land and ocean sinks increases as CO
2 levels in the atmosphere rise. In this respect they act as suppressing feedbacks in global warming.
Land surface change
Humans change the Earth's surface mainly to create more agricultural land. Today, agriculture takes up 34% of Earth's land area, while 26% is forests, and 30% is uninhabitable (glaciers, deserts, etc.). The amount of forested land continues to decrease, largely due to conversion to cropland in the tropics. This deforestation is the most significant aspect of land surface change affecting global warming. The main causes of deforestation are: permanent land-use change from forest to agricultural land producing products such as beef and palm oil (27%), logging to produce forestry/forest products (26%), short term shifting cultivation (24%), and wildfires (23%).
In addition to affecting greenhouse gas concentrations, land-use changes affect global warming through a variety of other chemical and physical mechanisms. Changing the type of vegetation in a region affects the local temperature, by changing how much of the sunlight gets reflected back into space (albedo), and how much heat is lost by evaporation. For instance, the change from a dark forest to grassland makes the surface lighter, causing it to reflect more sunlight. Deforestation can also contribute to changing temperatures by affecting the release of aerosols and other chemical compounds that influence clouds, and by changing wind patterns (when the land surface presents different obstructions to wind). In tropic and temperate areas the net effect is to produce a significant warming, while at latitudes closer to the poles a gain of albedo (as forest is replaced by snow cover) leads to an overall cooling effect. Globally, these effects are estimated to have led to a slight cooling, dominated by an increase in surface albedo.
Aerosols and clouds
Air pollution, in the form of aerosols, not only puts a large burden on human health, but also affects the climate on a large scale. From 1961 to 1990, a gradual reduction in the amount of sunlight reaching the Earth's surface was observed, a phenomenon popularly known as global dimming, typically attributed to aerosols from biofuel and fossil fuel burning. Aerosol removal by precipitation gives tropospheric aerosols an atmospheric lifetime of only about a week, while stratospheric aerosols can remain in the atmosphere for a few years. Globally, aerosols have been declining since 1990, meaning that they no longer mask global warming as much.
In addition to their direct effects (scattering and absorbing solar radiation), aerosols have indirect effects on the Earth's radiation budget. Sulfate aerosols act as cloud condensation nuclei and thus lead to clouds that have more and smaller cloud droplets. These clouds reflect solar radiation more efficiently than clouds with fewer and larger droplets. This effect also causes droplets to be more uniform in size, which reduces the growth of raindrops and makes clouds more reflective to incoming sunlight. Indirect effects of aerosols are the largest uncertainty in radiative forcing.
While aerosols typically limit global warming by reflecting sunlight, black carbon in soot that falls on snow or ice can contribute to global warming. Not only does this increase the absorption of sunlight, it also increases melting and sea-level rise. Limiting new black carbon deposits in the Arctic could reduce global warming by 0.2 °C by 2050.
As the Sun is the Earth's primary energy source, changes in incoming sunlight directly affect the climate system. Solar irradiance has been measured directly by satellites, and indirect measurements are available from the early 1600s. There has been no upward trend in the amount of the Sun's energy reaching the Earth, so it cannot be responsible for the current warming. Explosive volcanic eruptions represent the largest natural forcing over the industrial era. When the eruption is sufficiently strong (with sulfur dioxide reaching the stratosphere) sunlight can be partially blocked for a couple of years, with a temperature signal lasting about twice as long. In the industrial era, volcanic activity has had negligible impacts on global temperature change trends. Present-day volcanic CO2 emissions during eruptions and during non-eruptive periods represent only about 1% of current anthropogenic CO2 emissions.
Physical climate models are unable to reproduce the rapid warming observed in recent decades when taking into account only variations in solar output and volcanic activity. Further evidence for greenhouse gases being the cause of recent climate change come from measurements showing the warming of the lower atmosphere (the troposphere), coupled with the cooling of the upper atmosphere (the stratosphere). If solar variations were responsible for the observed warming, warming of both the troposphere and the stratosphere would be expected, but that has not been the case.
Climate change feedback
The response of the climate system to an initial forcing is modified by feedbacks: increased by self-reinforcing feedbacks and reduced by balancing feedbacks. The main reinforcing feedbacks are the water-vapour feedback, the ice–albedo feedback, and probably the net effect of clouds (described below). The primary balancing feedback to global temperature change is radiative cooling to space as infrared radiation in response to rising surface temperature. Uncertainty over feedbacks is the major reason why different climate models project different magnitudes of warming for a given amount of emissions.
As air gets warmer, it can hold more moisture. After an initial warming due to emissions of greenhouse gases, the atmosphere will hold more water. As water is a potent greenhouse gas, this further heats the climate: the water-vapour feedback. If cloud cover increases, more sunlight will be reflected back into space, cooling the planet. If clouds become more high and thin, then clouds can act more as an insulator, reflecting heat from below back downwards and warming the planet. Overall, the net cloud feedback over the industrial era has probably exacerbated temperature rise.
The reduction of snow cover and sea ice in the Arctic reduces the albedo of the Earth's surface. More of the Sun's energy is now absorbed in these regions, contributing to Arctic amplification, which has caused Arctic temperatures to increase at more than twice the rate of the rest of the world; this is the ice-albedo feedback. Arctic amplification is also melting permafrost, which releases methane and CO
2 into the atmosphere as another positive feedback.
Roughly half of each year's CO
2 emissions have been absorbed by plants on land and in oceans. CO
2 and an extended growing season have stimulated plant growth, making the land carbon cycle a balancing feedback. Climate change also increases droughts and heat waves that inhibit plant growth, which makes it uncertain that this balancing feedback will persist in the future. Soils contain large quantities of carbon and may release some when they heat up. As more CO
2 and heat are absorbed by the ocean, it acidifies, its circulation changes and phytoplankton takes up less carbon, decreasing the rate at which the ocean absorbs atmospheric carbon. Climate change can also increase methane emissions from wetlands, marine and freshwater systems, and permafrost.
Future warming and the carbon budget
Future warming depends on the strengths of climate feedbacks and on emissions of greenhouse gases. The former are often estimated using climate models. A climate model is a representation of the physical, chemical, and biological processes that affect the climate system. Models also include changes in the Earth's orbit, historical changes in the Sun's activity, and volcanic forcing. Computer models attempt to reproduce and predict the circulation of the oceans, the annual cycle of the seasons, and the flows of carbon between the land surface and the atmosphere. There are more than two dozen scientific institutions that develop major climate models. Models project different future temperature rises for given emissions of greenhouse gases; they also do not fully agree on the strength of different feedbacks on climate sensitivity and magnitude of inertia of the climate system.
The physical realism of models is tested by examining their ability to simulate contemporary or past climates. Past models have underestimated the rate of Arctic shrinkage and underestimated the rate of precipitation increase. Sea level rise since 1990 was underestimated in older models, but now agrees well with observations. The 2017 United States-published National Climate Assessment notes that "climate models may still be underestimating or missing relevant feedback processes".
Four Representative Concentration Pathways (RCPs) are used as input for climate models: "a stringent mitigation scenario (RCP2.6), two intermediate scenarios (RCP4.5 and RCP6.0) and one scenario with very high [greenhouse gas] emissions (RCP8.5)". RCPs only look at concentrations of greenhouse gases, and so does not include the response of the carbon cycle. Climate model projections summarized in the IPCC Fifth Assessment Report indicate that, during the 21st century, the global surface temperature is likely to rise a further 0.3 to 1.7 °C (0.5 to 3.1 °F) in a moderate scenario, or as much as 2.6 to 4.8 °C (4.7 to 8.6 °F) in an extreme scenario, depending on the rate of future greenhouse gas emissions and on climate feedback effects.
A subset of climate models add societal factors to a simple physical climate model. These models simulate how population, economic growth, and energy use affect—and interact with—the physical climate. With this information, these models can produce scenarios of how greenhouse gas emissions may vary in the future. This output is then used as input for physical climate models to generate climate change projections. In some scenarios emissions continue to rise over the century, while others have reduced emissions. Fossil fuel resources are too abundant for shortages to be relied on to limit carbon emissions in the 21st century. Emissions scenarios can be combined with modelling of the carbon cycle to predict how atmospheric concentrations of greenhouse gases might change in the future. According to these combined models, by 2100 the atmospheric concentration of CO2 could be as low as 380 or as high as 1400 ppm, depending on the Shared Socioeconomic Pathway (SSP) and the mitigation scenario.
The remaining carbon emissions budget is determined by modelling the carbon cycle and the climate sensitivity to greenhouse gases. According to the IPCC, global warming can be kept below 1.5 °C with a two-thirds chance if emissions after 2018 do not exceed 420 or 570 gigatonnes of CO
2 depending on the choice of the measure of global temperature. This amount corresponds to 10 to 13 years of current emissions. There are high uncertainties about the budget; for instance, it may be 100 gigatonnes of CO
2 smaller due to methane release from permafrost and wetlands.
The environmental effects of climate change are broad and far-reaching, effecting oceans, ice, and weather. Changes may occur gradually or rapidly. Evidence for these effects comes from studying climate change in the past, from modelling, and from modern observations. Since the 1950s, droughts and heat waves have appeared simultaneously with increasing frequency. Extremely wet or dry events within the monsoon period have increased in India and East Asia. Various mechanisms have been identified that might explain extreme weather in mid-latitudes from the rapidly warming Arctic, such as the jet stream becoming more erratic. The maximum rainfall and wind speed from hurricanes and typhoons is likely increasing.
Climate change has led to decades of shrinking and thinning of the Arctic sea ice, making it vulnerable to atmospheric anomalies. Projections of declines in Arctic sea ice vary. While ice-free summers are expected to be rare at 1.5 °C (2.7 °F) degrees of warming, they are set to occur once every three to ten years at a warming level of 2.0 °C (3.6 °F), increasing ice–albedo feedback.
Global sea level is rising as a consequence of glacial melt, melt of the ice sheets in Greenland and Antarctica, and thermal expansion. Between 1993 and 2017, the rise increased over time, averaging 3.1 ± 0.3 mm per year. Over the 21st century, the IPCC projects that in a very high emissions scenario the sea level could rise by 61–110 cm. Increased ocean warmth is undermining and threatening to unplug Antarctic glacier outlets, risking a large melt of the ice sheet and the possibility of a 2-meter sea level rise by 2100 under high emissions.
Higher atmospheric CO
2 concentrations have also led to changes in ocean chemistry. An increase in dissolved CO
2 is causing ocean acidification, harming corals and shellfish in particular. In addition, oxygen levels are decreasing as oxygen is less soluble in warmer water, with hypoxic dead zones expanding as a result of algal blooms stimulated by higher temperatures, higher CO
2 levels, ocean deoxygenation, and eutrophication.
Tipping points and long-term impacts
The greater the amount of global warming, the greater the risk of passing through ‘tipping points’, thresholds beyond which certain impacts can no longer be avoided even if temperatures are reduced. An example is the collapse of West Antarctic and Greenland ice sheets, where a certain temperature rise commits an ice sheet to melt, although the time scale required is uncertain and depends on future warming. Some large-scale changes could occur over a short time period, such as a collapse of the Atlantic Meridional Overturning Circulation, which would trigger major climate changes in the North Atlantic, Europe, and North America.
The long-term effects of climate change include further ice melt, ocean warming, sea level rise, and ocean acidification. On the timescale of centuries to millennia, the magnitude of climate change will be determined primarily by anthropogenic CO
2 emissions. This is due to CO
2's long atmospheric lifetime. Oceanic CO
2 uptake is slow enough that ocean acidification will continue for hundreds to thousands of years. These emissions are estimated to have prolonged the current interglacial period by at least 100,000 years. Sea level rise will continue over many centuries, with an estimated rise of 2.3 metres per degree Celsius (4.2 ft/°F) after 2000 years.
Nature and wildlife
Recent warming has driven many terrestrial and freshwater species poleward and towards higher altitudes. Higher atmospheric CO
2 levels and an extended growing season have resulted in global greening, whereas heatwaves and drought have reduced ecosystem productivity in some regions. The future balance of these opposing effects is unclear. Climate change has contributed to the expansion of drier climate zones, such as the expansion of deserts in the subtropics. The size and speed of global warming is making abrupt changes in ecosystems more likely. Overall, it is expected that climate change will result in the extinction of many species and reduced diversity of ecosystems.
The oceans have heated more slowly than the land, but plants and animals in the ocean have migrated towards the colder poles as fast as or faster than species on land. Just as on land, heat waves in the ocean occur more frequently due to climate change, with harmful effects found on a wide range of organisms such as corals, kelp, and seabirds. Ocean acidification threatens damage to coral reefs, fisheries, protected species, and other natural resources of value to society. Harmful algae bloom enhanced by climate change and eutrophication cause anoxia, disruption of food webs and massive large-scale mortality of marine life. Coastal ecosystems are under particular stress, with almost half of wetlands having disappeared as a consequence of climate change and other human impacts.
The effects of climate change on humans, mostly due to warming and shifts in precipitation, have been detected worldwide. Regional impacts of climate change are now observable on all continents and across ocean regions, with low-latitude, less developed areas facing the greatest risk. The Arctic, Africa, small islands, and Asian megadeltas are likely to be especially affected by future climate change.
Health impacts include both the direct effects of extreme weather, leading to injury and loss of life, as well as indirect effects, such as undernutrition brought on by crop failures. Various infectious diseases are more easily transmitted in a warmer climate, such as dengue fever, which affects children most severely, and malaria. Young children are the most vulnerable to food shortages, and together with older people, to extreme heat. The World Health Organization (WHO) has estimated that between 2030 and 2050, climate change is expected to cause approximately 250,000 additional deaths per year from heat exposure in elderly people, increases in diarrheal disease, malaria, dengue, coastal flooding, and childhood undernutrition. Over 500,000 additional adult deaths are projected yearly by 2050 due to reductions in food availability and quality. The WHO has classified human health impacts from climate change as the greatest threat to global health in the 21st century.
Climate change is affecting food security and has caused reduction in global mean yields of maize, wheat, and soybeans between 1981 and 2010. Future warming could further reduce global yields of major crops. Crop production will probably be negatively affected in low-latitude countries, while effects at northern latitudes may be positive or negative. Up to an additional 183 million people worldwide, particularly those with lower incomes, are at risk of hunger as a consequence of these impacts. The effects of warming on the oceans also impact fish stocks, with decreases in the maximum catch potential, although there is significant geographic variability in this trend, with polar stocks showing an increase. Regions dependent on glacier water, regions that are already dry, and small islands are also at increased risk of water stress due to climate change.
Economic damages due to climate change have been underestimated, and may be severe, with the probability of disastrous tail-risk events being nontrivial. Climate change has likely already increased global economic inequality, and is projected to continue doing so. Most of the severe impacts are expected in sub-Saharan Africa and South-East Asia, where existing poverty is already exacerbated. The World Bank estimates that climate change could drive over 120 million people into poverty by 2030.  Current inequalities between men and women, between rich and poor, and between different ethnicities have been observed to worsen as a consequence of climate variability and climate change.
Low-lying islands and coastal communities are threatened through hazards posed by sea level rise, such as flooding and permanent submergence. This could lead to statelessness for populations in island nations, such as the Maldives and Tuvalu. In some regions, rise in temperature and humidity may also be too severe for humans to adapt to. In the next 50 years, 1 to 3 billion people are projected to be left outside the historically favourable climate conditions. These factors, plus weather extremes, can drive environmental migration, both within and between countries. Up to 1 billion people could be displaced due to climate change by 2050, with 200 million being the most repeated prediction; however, these numbers have been described as an upper bound.
The two conventional responses are mitigation (preventing as much additional warming as possible by reducing greenhouse gas emissions) and adaptation (adjusting society to compensate for unavoidable warming). Many of the countries that have contributed least to global greenhouse gas emissions are among the most vulnerable to climate change, which raises questions about justice and fairness with regard to mitigation and adaptation. A third option is climate engineering, which refers to direct interventions in the Earth's climate system.
The IPCC has stressed the need to keep global warming below 1.5 °C (2.7 °F) compared to pre-industrial levels in order to avoid some irreversible impacts. Climate change impacts can be mitigated by reducing greenhouse gas emissions and by enhancing the capacity of Earth's surface to absorb greenhouse gases from the atmosphere. In order to limit global warming to less than 1.5 °C with a high likelihood of success, the IPCC estimates that global greenhouse gas emissions will need to be net zero by 2050, or by 2070 with a 2 °C target. This will require far-reaching, systemic changes on an unprecedented scale in energy, land, cities, transport, buildings, and industry. To make progress towards a goal of limiting warming to 1.5 °C, the United Nations Environment Programme estimates that, within the next decade, countries will need to triple the amount of reductions they have committed to in their current Paris Agreements.
Changing sources of energy
Long-term scenarios point to rapid and significant investment in renewable energy and energy efficiency as key to reducing GHG emissions. Fossil fuels accounted for 80% of the world's energy in 2018, while the remaining share of power production was split between nuclear power, hydropower, and non-hydro renewables.; that mix is expected to change significantly over the next 30 years. Renewable energy technologies include solar and wind power, bioenergy, geothermal energy, and hydropower. Photovoltaic solar and wind, in particular, have seen substantial growth and progress over the last few years, such that they are currently among the cheapest sources of new power generation. Renewables represented 75% of all new electricity generation installed in 2019, with solar and wind constituting nearly all of that amount.
There are obstacles to the continued rapid development of renewable energy. Environmental and land use concerns are sometimes associated with large solar, wind and hydropower projects. Solar and wind power also require energy storage systems and other modifications to the electricity grid to operate effectively, although several storage technologies are now emerging to supplement the traditional use of pumped-storage hydropower. The use of rare-earth metals and other hazardous materials has also been raised as a concern with solar power. The use of bioenergy is often not carbon neutral, and may have negative consequences for food security, largely due to the amount of land required compared to other renewable energy options. Hydropower growth has been slowing and is set to decline further due to concerns about social and environmental impacts. While not a traditional renewable, nuclear energy has continued to be a significant part of the global energy mix. However, nuclear power costs are increasing amidst stagnant power share, so that nuclear power generation is now several times more expensive per megawatt hour than wind and solar.
Carbon capture and sequestration
Where energy production or CO
2-intensive heavy industries continue to produce waste CO
2, the gas can be captured and stored instead of being released to the atmosphere. Although costly, carbon capture and storage (CCS) may be able to play a significant role in limiting CO
2 emissions by mid-century.
Earth's natural carbon sinks can be enhanced to sequester significantly larger amounts of CO
2 beyond naturally occurring levels. Forest preservation, reforestation and tree planting on non-forest lands are considered the most effective, although they raise food security concerns. Soil management on croplands and grasslands is another effective mitigation technique. As models disagree on the feasibility of land-based negative emissions methods for mitigation, strategies based on them are risky.
Although there is no single pathway to limit global warming to 1.5 or 2 °C, most scenarios and strategies see a major increase in the use of renewable energy in combination with increased energy efficiency measures to generate the needed greenhouse gas reductions. To reduce pressures on ecosystems and enhance their carbon sequestration capabilities, changes would also be necessary in forestry and agriculture. Scenarios that limit global warming to 1.5 °C generally project the large scale use of CO
2 removal methods in addition to greenhouse gas reduction approaches.
To achieve carbon neutrality by 2050, renewable energy would become the dominant form of electricity generation, rising to 85% or more by 2050 in some scenarios. The use of electricity for other needs, such as heating, would rise to the point where electricity becomes the largest form of overall energy supply by 2050. Investment in coal would be eliminated and coal use nearly phased out by 2050.
In transport, scenarios envision sharp increases in the market share of electric vehicles, low carbon fuel substitution for other transportation modes like shipping, and changes in transportation patterns that increase efficiency, for example increased public transport. Buildings will see additional electrification with the use of technologies like heat pumps, as well as continued energy efficiency improvements achieved via low energy building codes. Industrial efforts will focus on increasing the energy efficiency of production processes, such as the use of cleaner technology for cement production, designing and creating less energy intensive products, increasing product lifetimes, and developing incentives to reduce product demand.
The agriculture and forestry sector faces a triple challenge of limiting greenhouse gas emissions, preventing further conversion of forests to agricultural land, and meeting increases in world food demand. A suite of actions could reduce agriculture/forestry based greenhouse gas emissions by 66% from 2010 levels by reducing growth in demand for food and other agricultural products, increasing land productivity, protecting and restoring forests, and reducing greenhouse gas emissions from agricultural production.
Individuals can also take actions to reduce their carbon footprint. These include: driving an electric or other energy efficient car, reducing vehicles miles by using mass transit or cycling, adopting a plant-based diet, reducing energy use in the home, limiting consumption of goods and services, and foregoing air travel.
Policies and measures
A wide range of policies, regulations and laws are being used to reduce greenhouse gases. Carbon pricing mechanisms include carbon taxes and emissions trading systems. As of 2019, carbon pricing covers about 20% of global greenhouse gas emissions. Renewable portfolio standards have been enacted in several countries requiring utilities to increase the percentage of electricity they generate from renewable sources. Phasing out of fossil fuel subsidies, currently estimated at $300 billion globally (about twice the level of renewable energy subsidies), could reduce greenhouse gas emissions by 6%. Subsidies could also be redirected to support the transition to clean energy. More prescriptive methods that can reduce greenhouse gases include vehicle efficiency standards, renewable fuel standards, and air pollution regulations on heavy industry.
Reducing air pollution from the burning of fossil fuels will have significant co-benefits in terms of human health. For instance, the WHO estimates that ambient air pollution currently causes 4.2 million deaths per year due to stroke, heart disease, lung cancer, and respiratory diseases. Meeting Paris Agreement goals could save about a million of those lives per year worldwide from reduced pollution by 2050.
As the use of fossil fuels is reduced, there are Just Transition considerations involving the social and economic challenges that arise. An example is the employment of workers in the affected industries, along with the well-being of the broader communities involved. Climate justice considerations, such as those facing indigenous populations in the Arctic, are another important aspect of mitigation policies.
Adaptation is "the process of adjustment to current or expected changes in climate and its effects". As climate change effects vary across regions, so do adaptation strategies. While some adaptation responses call for trade-offs, others bring synergies and co-benefits. Increased use of air conditioning allows people to better cope with heat, but also increases energy demand. Other examples of adaptation include improved coastline protection, better disaster management, and the development of more resistant crops.
Adaptation is especially important in developing countries since they are predicted to bear the brunt of the effects of climate change. The capacity and potential for humans to adapt, called adaptive capacity, is unevenly distributed across different regions and populations, and developing countries generally have less. There are limits to adaptation and more severe climate change requires more transformative adaptation, which can be prohibitively expensive. The public sector, private sector, and communities are all gaining experience with adaptation, and adaptation is becoming embedded within their planning processes.
Geoengineering or climate engineering is the deliberate large-scale modification of the climate, considered a potential future method for counteracting climate change. Techniques fall generally into the categories of solar radiation management and carbon dioxide removal, although various other schemes have been suggested. A 2018 review paper concluded that although geoengineering is physically possible, all the techniques are in early stages of development, carry large risks and uncertainties and raise significant ethical and legal issues.
Society and culture
The geopolitics of climate change is complex and has often been framed as a free-rider problem, in which all countries benefit from mitigation done by other countries, but individual countries would lose from investing in a transition to a low-carbon economy themselves. However, net importers of fossil fuels win economically from transitioning, causing net exporters to face stranded assets: fossil fuels they cannot sell, if they choose not to transition. Furthermore, the benefits in terms of public health and local environmental improvements of coal phase out exceed the costs in almost all regions, potentially further eliminating the free-rider problem. The geopolitics are further complicated by the supply chain of rare earth metals necessary to produce many clean technologies.
United Nations Framework Convention
Nearly all countries in the world are parties to the United Nations Framework Convention on Climate Change (UNFCCC). The objective of the UNFCCC is to prevent dangerous human interference with the climate system. As stated in the convention, this requires that greenhouse gas concentrations are stabilized in the atmosphere at a level where ecosystems can adapt naturally to climate change, food production is not threatened, and economic development can be sustained. Global emissions have risen since signing of the UNFCCC, as it does not actually restrict emissions but rather provides a framework for protocols that do. Its yearly conferences are the stage of global negotiations.
The importance of the United Nations Framework Convention on Climate Change is underlined by the Sustainable Development Goal 13 which is to "Take urgent action to combat climate change and its impacts". It is one of the 17 Sustainable Development Goals (SDGs) to be achieved by 2030. One of the targets of SDG 13 is for developed countries to implement the commitments of mobilizing $100 billion per year to address the needs of developing countries, and make sure the Green Climate Fund becomes operational as soon as possible.
Other climate change treaties include the 1997 Kyoto Protocol, which extended UNFCCC and in which most developed countries accepted legally binding commitments to limit their emissions, and the 2009 Copenhagen Accord. During Kyoto Protocol negotiations, the G77 (representing developing countries) pushed for a mandate requiring developed countries to "[take] the lead" in reducing their emissions, since developed countries contributed most to the accumulation of greenhouse gases in the atmosphere, and since per-capita emissions were still relatively low in developing countries. (and emissions of developing countries would grow to meet their development needs.) Copenhagen Accord has been widely portrayed as disappointing because of its low goals, and has been rejected by poorer nations including the G77. Nations associated with the Accord aimed to limit the future increase in global mean temperature to below 2 °C.
In 2015 all UN countries negotiated the Paris Agreement, which aims to keep global warming well below 2 °C and contains an aspirational goal of keeping warming under 1.5 °C. The agreement replaced the Kyoto Protocol. Unlike Kyoto, no binding emission targets were set in the Paris Agreement. Instead, the procedure of regularly setting ever more ambitious goals and reevaluating these goals every five years has been made binding. The Paris Agreement reiterated that developing countries must be financially supported. As of November 2019[update], 194 states and the European Union have signed the treaty and 186 states and the EU have ratified or acceded to the agreement. In November 2020 the United States withdrew from the Paris Agreement.
In 2019, the British Parliament became the first national government in the world to officially declare a climate emergency. Other countries and jurisdictions followed suit. In November 2019 the European Parliament declared a "climate and environmental emergency", and the European Commission presented its European Green Deal with the goal of making the EU carbon-neutral by 2050.
While ozone depletion and global warming are considered separate problems, the solution to the former has significantly mitigated global warming. The greenhouse gas emission mitigation of the Montreal Protocol, an international agreement to stop emitting ozone-depleting gases, is estimated to have been more effective than that of the Kyoto Protocol, which was specifically designed to curb greenhouse gas emissions. It has been argued that the Montreal Protocol may have done more than any other measure, as of 2017[update], to mitigate global warming as those substances were also powerful greenhouse gases.
There is an overwhelming scientific consensus that global surface temperatures have increased in recent decades and that the trend is caused mainly by human-induced emissions of greenhouse gases, with 97% or more of actively publishing climate scientists agreeing. The consensus has grown to 100% among research scientists on anthropogenic global warming as of 2019. No scientific body of national or international standing disagrees with this view. Consensus has further developed that some form of action should be taken to protect people against the impacts of climate change, and national science academies have called on world leaders to cut global emissions.
Scientific discussion takes place in journal articles that are peer-reviewed, which scientists subject to assessment every couple of years in the Intergovernmental Panel on Climate Change reports. In 2013, the IPCC Fifth Assessment Report stated that "is extremely likely that human influence has been the dominant cause of the observed warming since the mid-20th century". Their 2018 report expressed the scientific consensus as: "human influence on climate has been the dominant cause of observed warming since the mid-20th century". Scientists have issues two warnings to humanity, in 2017 and 2019, expressing concern about the current trajectory of potentially catastrophic climate change, and about untold human suffering as a consequence.
Climate change came to international public attention in the late 1980s. Due to confusing media coverage in the early 1990s, understanding was often confounded by conflation with other environmental issues like ozone depletion. In popular culture, the first movie to reach a mass public on the topic was The Day After Tomorrow in 2004, followed a few years later by the Al Gore documentary An Inconvenient Truth. Books, stories and films about climate change fall under the genre of climate fiction.
Significant regional differences exist in both public concern for and public understanding of climate change. In 2010, just a little over half the US population viewed it as a serious concern for either themselves or their families, while 73% of people in Latin America and 74% in developed Asia felt this way. Similarly, in 2015 a median of 54% of respondents considered it "a very serious problem", but Americans and Chinese (whose economies are responsible for the greatest annual CO2 emissions) were among the least concerned. Public reactions to climate change and concern about its effects have been increasing, with many perceiving it as the worst global threat. A 2020 report from the Pew Research Center reports that 65% in the US agreed that the federal government is "doing too little" to reduce the effects of climate change.
Denial and misinformation
Public debate about climate change has been strongly affected by climate change denial and misinformation, which originated in the United States and has since spread to other countries, particularly Canada and Australia. The actors behind climate change denial form a well-funded and relatively coordinated coalition of fossil fuel companies, industry groups, conservative think tanks, and contrarian scientists. Like the tobacco industry before, the main strategy of these groups has been to manufacture doubt about scientific data and results. Many who deny, dismiss, or hold unwarranted doubt about the scientific consensus on anthropogenic climate change are labelled as "climate change skeptics", which several scientists have noted is a misnomer.
There are different variants of climate denial: some deny that warming takes place at all, some acknowledge warming but attribute it to natural influences, and some minimize the negative impacts of climate change. Manufacturing uncertainty about the science later developed into a manufacturing controversy: creating the belief that there is significant uncertainty about climate change within the scientific community in order to delay policy changes. Strategies to promote these ideas include criticism of scientific institutions, and questioning the motives of individual scientists. An "echo chamber" of climate-denying blogs and media has further fomented misunderstanding of climate change.
Protest and litigation
Climate protests have risen in popularity in the 2010s in such forms as public demonstrations, fossil fuel divestment, and lawsuits. Prominent recent demonstrations include the school strike for climate, and civil disobedience. In the school strike, youth across the globe have protested by skipping school, inspired by Swedish teenager Greta Thunberg. Mass civil disobedience actions by groups like Extinction Rebellion have protested by causing disruption. Litigation is increasingly used as a tool to strengthen climate action, with many lawsuits targeting governments to demand that they take ambitious action or enforce existing laws regarding climate change. Lawsuits against fossil-fuel companies, from activists, shareholders and investors, generally seek compensation for loss and damage.
In 1824 Joseph Fourier proposed a version of the greenhouse effect; transparent atmosphere lets through visible light, which warms the surface. The warmed surface emits infrared radiation, but the atmosphere is relatively opaque to infrared and slows the emission of energy, warming the planet. Starting in 1859, John Tyndall established that nitrogen and oxygen (99% of dry air) are transparent to infrared, but water vapour and traces of some gases (significantly methane and carbon dioxide) both absorb infrared and, when warmed, emit infrared radiation. Changing concentrations of these gases could have caused "all the mutations of climate which the researches of geologists reveal" including ice ages.
Svante Arrhenius noted that water vapour in air continuously varied, but carbon dioxide (CO
2) was determined by long term geological processes. At the end of an ice age, warming from increased CO
2 would increase the amount of water vapour, amplifying its effect in a feedback process. In 1896, he published the first climate model of its kind, showing that halving of CO
2 could have produced the drop in temperature initiating the ice age. Arrhenius calculated the temperature increase expected from doubling CO
2 to be around 5–6 °C (9.0–10.8 °F). Other scientists were initially sceptical and believed the greenhouse effect to be saturated so that adding more CO
2 would make no difference. Experts thought climate would be self-regulating. From 1938 Guy Stewart Callendar published evidence that climate was warming and CO
2 levels increasing, but his calculations met the same objections.
Early calculations treated the atmosphere as a single layer but in the 1950s, Gilbert Plass used digital computers to model the different layers and found added CO
2 would cause warming. In the same decade Hans Suess found evidence CO
2 levels had been rising, Roger Revelle showed the oceans would not absorb the increase, and together they helped Charles Keeling to begin a record of continued increase, the Keeling Curve. Scientists alerted the public, and the dangers were highlighted at James Hansen's 1988 Congressional testimony. The Intergovernmental Panel on Climate Change, set up in 1988 to provide formal advice to the world's governments, spurred interdisciplinary research.
Before the 1980s, when it was unclear whether warming by greenhouse gases would dominate aerosol-induced cooling, scientists often used the term inadvertent climate modification to refer to humankind's impact on the climate. In the 1980s, the terms global warming and climate change were introduced, the former referring only to increased surface warming, while the latter describes the full effect of greenhouse gases on the climate. Global warming became the most popular term after NASA climate scientist James Hansen used it in his 1988 testimony in the U.S. Senate. In the 2000s, the term climate change increased in popularity. In lay usage, global warming usually refers to human-induced warming of the Earth system, whereas climate change can refer to natural as well as anthropogenic change. The two terms are often used interchangeably.
Various scientists, politicians and media figures have adopted the terms climate crisis or climate emergency to talk about climate change, while using global heating instead of global warming. The policy editor-in-chief of The Guardian explained that they included this language in their editorial guidelines "to ensure that we are being scientifically precise, while also communicating clearly with readers on this very important issue". Oxford Dictionary chose climate emergency as its word of the year in 2019 and defines the term as "a situation in which urgent action is required to reduce or halt climate change and avoid potentially irreversible environmental damage resulting from it".
- IPCC AR5 WG1 Summary for Policymakers 2013, p. 4: Warming of the climate system is unequivocal, and since the 1950s many of the observed changes are unprecedented over decades to millennia. The atmosphere and ocean have warmed, the amounts of snow and ice have diminished, sea level has risen, and the concentrations of greenhouse gases have increased; Gleick, 7 January 2017
- IPCC SR15 Ch1 2018, p. 54: Abundant empirical evidence of the unprecedented rate and global scale of impact of human influence on the Earth System (Steffen et al., 2016; Waters et al., 2016) has led many scientists to call for an acknowledgement that the Earth has entered a new geological epoch: the Anthropocene.
- "Scientific Consensus: Earth's Climate is Warming". Climate Change: Vital Signs of the Planet. NASA JPL. Archived from the original on 28 March 2020. Retrieved 29 March 2020.
- EPA 2020: Carbon dioxide (76%), Methane (16%), Nitrous Oxide (6%).
- EPA 2020: Carbon dioxide enters the atmosphere through burning fossil fuels (coal, natural gas, and oil), solid waste, trees and other biological materials, and also as a result of certain chemical reactions (e.g., manufacture of cement). Fossil fuel use is the primary source of CO
2 can also be emitted from direct human-induced impacts on forestry and other land use, such as through deforestation, land clearing for agriculture, and degradation of soils. Methane is emitted during the production and transport of coal, natural gas, and oil. Methane emissions also result from livestock and other agricultural practices and by the decay of organic waste in municipal solid waste landfills.
- USGCRP Chapter 3 2017 Figure 3.1 panel 2, Figure 3.3 panel 5.
- IPCC SRCCL 2019, p. 7: Since the pre-industrial period, the land surface air temperature has risen nearly twice as much as the global average temperature (high confidence). Climate change... contributed to desertification and land degradation in many regions (high confidence).; IPCC SRCCL 2019, p. 45: Climate change is playing an increasing role in determining wildfire regimes alongside human activity (medium confidence), with future climate variability expected to enhance the risk and severity of wildfires in many biomes such as tropical rainforests (high confidence).
- IPCC SROCC 2019, p. 16: Over the last decades, global warming has led to widespread shrinking of the cryosphere, with mass loss from ice sheets and glaciers (very high confidence), reductions in snow cover (high confidence) and Arctic sea ice extent and thickness (very high confidence), and increased permafrost temperature (very high confidence).
- IPCC SRCCL 2019, p. 7: Climate change, including increases in frequency and intensity of extremes, has adversely impacted food security and terrestrial ecosystems as well as contributed to desertification and land degradation in many regions (high confidence).
- IPCC SROCC 2019, p. 22: Ocean warming in the 20th century and beyond has contributed to an overall decrease in maximum catch potential (medium confidence), compounding the impacts from overfishing for some fish stocks (high confidence). In many regions, declines in the abundance of fish and shellfish stocks due to direct and indirect effects of global warming and biogeochemical changes have already contributed to reduced fisheries catches (high confidence).
- WHO, Nov 2015: Climate change is the greatest threat to global health in the 21st century.
- EPA (19 January 2017). "Climate Impacts on Ecosystems". Archived from the original on 27 January 2018. Retrieved 5 February 2019.
Mountain and arctic ecosystems and species are particularly sensitive to climate change... As ocean temperatures warm and the acidity of the ocean increases, bleaching and coral die-offs are likely to become more frequent.
- IPCC SR15 Ch1 2018, p. 64: Sustained net zero anthropogenic emissions of CO
2 and declining net anthropogenic non-CO
2 radiative forcing over a multi-decade period would halt anthropogenic global warming over that period, although it would not halt sea level rise or many other aspects of climate system adjustment.
- Trenberth & Fasullo 2016
- "Climate Change: Global Temperature".
- IPCC SR15 Summary for Policymakers 2018, p. 7: Future climate-related risks ... are larger if global warming exceeds 1.5 °C (2.7 °F) before returning to that level by 2100 than if global warming gradually stabilizes at 1.5°C. ... Some impacts may be long-lasting or irreversible, such as the loss of some ecosystems (high confidence).
- Climate Action Tracker 2019, p. 1: Under current pledges, the world will warm by 2.8°C by the end of the century, close to twice the limit they agreed in Paris. Governments are even further from the Paris temperature limit in terms of their real-world action, which would see the temperature rise by 3°C.; United Nations Environment Programme 2019, p. 27.
- IPCC SR15 Ch2 2018, p. 95: In model pathways with no or limited overshoot of 1.5°C, global net anthropogenic CO
2 emissions decline by about 45% from 2010 levels by 2030 (40–60% interquartile range), reaching net zero around 2050 (2045–2055 interquartile range); Rogelj et al. 2015.
- Neukom et al. 2019.
- "Global Annual Mean Surface Air Temperature Change". NASA. Retrieved 23 February 2020.
- EPA 2016: The U.S. Global Change Research Program, the National Academy of Sciences, and the Intergovernmental Panel on Climate Change (IPCC) have each independently concluded that warming of the climate system in recent decades is "unequivocal". This conclusion is not drawn from any one source of data but is based on multiple lines of evidence, including three worldwide temperature datasets showing nearly identical warming trends as well as numerous other independent indicators of global warming (e.g. rising sea levels, shrinking Arctic sea ice).
- IPCC SR15 Summary for Policymakers 2018, p. 4; WMO 2019, p. 6.
- IPCC SR15 Ch1 2018, p. 81.
- IPCC AR5 WG1 Ch2 2013, p. 162.
- IPCC AR5 WG1 Ch5 2013, p. 386; Neukom et al. 2019.
- IPCC AR5 WG1 Ch5 2013, pp. 389, 399–400: "The PETM [around 55.5–55.3 million years ago] was marked by ... global warming of 4 °C to 7 °C ... Deglacial global warming occurred in two main steps from 17.5 to 14.5 ka [thousand years ago] and 13.0 to 10.0 ka."
- IPCC SR15 Ch1 2018, p. 54.
- IPCC SR15 Ch1 2018, p. 57: This report adopts the 51-year reference period, 1850–1900 inclusive, assessed as an approximation of pre-industrial levels in AR5 ... Temperatures rose by 0.0 °C–0.2 °C from 1720–1800 to 1850–1900; Hawkins et al. 2017, p. 1844.
- IPCC AR5 WG1 Summary for Policymakers 2013, pp. 4–5: "Global-scale observations from the instrumental era began in the mid-19th century for temperature and other variables ... the period 1880 to 2012 ... multiple independently produced datasets exist."
- Kennedy et al. 2010, p. S26. Figure 2.5.
- Kennedy et al. 2010, pp. S26, S59-S60; USGCRP Chapter 1 2017, p. 35.
- IPCC AR4 WG2 Ch1 2007, Sec. 184.108.40.206, p. 99.
- "Global Warming". NASA JPL. Retrieved 11 September 2020.
Satellite measurements show warming in the troposphere but cooling in the stratosphere. This vertical pattern is consistent with global warming due to increasing greenhouse gases, but inconsistent with warming from natural causes.
- Sévellec & Drijfhout 2018.
- England et al. 2014; Knight et al. 2009.
- Lindsey 2018.
- United States Environmental Protection Agency 2016, p. 5: "Black carbon that is deposited on snow and ice darkens those surfaces and decreases their reflectivity (albedo). This is known as the snow/ice albedo effect. This effect results in the increased absorption of radiation that accelerates melting."
- IPCC SRCCL Summary for Policymakers 2019, p. 7.
- Sutton, Dong & Gregory 2007.
- "Climate Change: Ocean Heat Content". NOAA. 2018. Archived from the original on 12 February 2019. Retrieved 20 February 2019.
- IPCC AR5 WG1 Ch3 2013, p. 257: "Ocean warming dominates the global energy change inventory. Warming of the ocean accounts for about 93% of the increase in the Earth's energy inventory between 1971 and 2010 (high confidence), with warming of the upper (0 to 700 m) ocean accounting for about 64% of the total.
- Cazenave et al. 2014.
- NOAA, 10 July 2011.
- IPCC AR5 WG1 Ch12 2013, p. 1062; Cohen et al. 2014.
- NASA, 12 September 2018.
- Delworth & Zeng 2012, p. 5; Franzke et al. 2020.
- National Research Council 2012, p. 9.
- IPCC AR5 WG1 Ch10 2013, p. 916.
- Knutson 2017, p. 443; IPCC AR5 WG1 Ch10 2013, pp. 875–876.
- USGCRP 2009, p. 20.
- IPCC AR5 WG1 Summary for Policymakers 2013, pp. 13–14.
- NASA. "The Causes of Climate Change". Climate Change: Vital Signs of the Planet. Archived from the original on 8 May 2019. Retrieved 8 May 2019.
- IPCC AR4 WG1 Ch1 2007, FAQ1.1: "To emit 240 W m−2, a surface would have to have a temperature of around −19 °C (−2 °F). This is much colder than the conditions that actually exist at the Earth's surface (the global mean surface temperature is about 14 °C).
- ACS. "What Is the Greenhouse Effect?". Archived from the original on 26 May 2019. Retrieved 26 May 2019.
- Schmidt et al. 2010; USGCRP Climate Science Supplement 2014, p. 742.
- Wang, Shugart & Lerdau 2017.
- The Guardian, 19 February 2020.
- WMO 2020, p. 5.
- BBC, 10 May 2013; Schiermeier 2015.
- Siegenthaler et al. 2005; Lüthi et al. 2008.
- BBC, 10 May 2013.
- Olivier & Peters 2019, p. 14, 16–17, 23.
- EPA 2020: The main human activity that emits CO
2 is the combustion of fossil fuels (coal, natural gas, and oil) for energy and transportation, although certain industrial processes and land-use changes also emit CO
- Olivier & Peters 2019, p. 17; Our World In Data, 18 September 2020; EPA 2020: Greenhouse gas emissions from industry primarily come from burning fossil fuels for energy, as well as greenhouse gas emissions from certain chemical reactions necessary to produce goods from raw materials; "Redox, extraction of iron and transition metals".
Hot air (oxygen) reacts with the coke (carbon) to produce carbon dioxide and heat energy to heat up the furnace. Removing impurities: The calcium carbonate in the limestone thermally decomposes to form calcium oxide. calcium carbonate → calcium oxide + carbon dioxide; Kvande 2014: Carbon dioxide gas is formed at the anode, as the carbon anode is consumed upon reaction of carbon with the oxygen ions from the alumina (Al2O3). Formation of carbon dioxide is unavoidable as long as carbon anodes are used, and it is of great concern because CO2 is a greenhouse gas
- EPA 2020; Global Methane Initiative 2020: Estimated Global Anthropogenic Methane Emissions by Source, 2020: Enteric fermentation (27%), Manure Management (3%), Coal Mining (9%), Municipal Solid Waste (11%), Oil & Gas (24%), Wastewater (7%), Rice Cultivation (7%).
- Michigan State University 2014: Nitrous oxide is produced by microbes in almost all soils. In agriculture, N2O is emitted mainly from fertilized soils and animal wastes—wherever nitrogen (N) is readily available.; EPA 2019: Agricultural activities, such as fertilizer use, are the primary source of N2O emissions; Davidson 2009: 2.0% of manure nitrogen and 2.5% of fertilizer nitrogen was converted to nitrous oxide between 1860 and 2005; these percentage contributions explain the entire pattern of increasing nitrous oxide concentrations over this period.
- Bajzelj, Allwood & Cullen 2013.
- EPA 2019.
- IPCC SRCCL Summary for Policymakers 2019, p. 10.
- IPCC SROCC Ch5 2019, p. 450.
- Friedlingstein et al. 2019, p. 1803.
- Ritchie & Roser 2018
- The Sustainability Consortium, 13 September 2018; UN FAO 2016, p. 18.
- Curtis et al. 2018.
- World Resources Institute, 8 December 2019.
- IPCC SRCCL Ch2 2019, p. 172: "The global biophysical cooling alone has been estimated by a larger range of climate models and is −0.10 ± 0.14°C; it ranges from –0.57°C to +0.06°C ... This cooling is essentially dominated by increases in surface albedo: historical land cover changes have generally led to a dominant brightening of land".
- Haywood 2016, p. 456; McNeill 2017; Samset et al. 2018.
- IPCC AR5 WG1 Ch2 2013, p. 183.
- He et al. 2018; Storelvmo et al. 2016.
- Ramanathan & Carmichael 2008.
- Wild et al. 2005; Storelvmo et al. 2016; Samset et al. 2018.
- Twomey 1977.
- Albrecht 1989.
- USGCRP Chapter 2 2017, p. 78.
- Ramanathan & Carmichael 2008; RIVM 2016.
- Sand et al. 2015.
- USGCRP Chapter 2 2017, p. 78.
- National Research Council 2008, p. 6.
- "Is the Sun causing global warming?". Climate Change: Vital Signs of the Planet. Archived from the original on 5 May 2019. Retrieved 10 May 2019.
- USGCRP Chapter 2 2017, p. 79
- Fischer & Aiuppa 2020.
- Schmidt, Shindell & Tsigaridis 2014; Fyfe et al. 2016.
- IPCC AR4 WG1 Ch9 2007, pp. 702–703; Randel et al. 2009.
- "Thermodynamics: Albedo". NSIDC. Archived from the original on 11 October 2017. Retrieved 10 October 2017.
- "The study of Earth as an integrated system". Vitals Signs of the Planet. Earth Science Communications Team at NASA's Jet Propulsion Laboratory / California Institute of Technology. 2013. Archived from the original on 26 February 2019..
- USGCRP Chapter 2 2017, pp. 89-91.
- USGCRP Chapter 2 2017, pp. 89-90.
- Wolff et al. 2015: "the nature and magnitude of these feedbacks are the principal cause of uncertainty in the response of Earth's climate (over multi-decadal and longer periods) to a particular emissions scenario or greenhouse gas concentration pathway."
- Williams, Ceppi & Katavouta 2020.
- USGCRP Chapter 2 2017, p. 90.
- NASA, 28 May 2013.
- Cohen et al. 2014.
- Turetsky et al. 2019.
- NASA, 16 June 2011: "So far, land plants and the ocean have taken up about 55 percent of the extra carbon people have put into the atmosphere while about 45 percent has stayed in the atmosphere. Eventually, the land and oceans will take up most of the extra carbon dioxide, but as much as 20 percent may remain in the atmosphere for many thousands of years."
- IPCC SRCCL Ch2 2019, p. 133.
- Melillo et al. 2017: Our first-order estimate of a warming-induced loss of 190 Pg of soil carbon over the 21st century is equivalent to the past two decades of carbon emissions from fossil fuel burning.
- USGCRP Chapter 2 2017, pp. 93-95.
- Dean et al. 2018.
- Wolff et al. 2015
- IPCC AR5 SYR Glossary 2014, p. 120.
- Carbon Brief, 15 January 2018, "What are the different types of climate models?".
- Carbon Brief, 15 January 2018, "What is a climate model?".
- Carbon Brief, 15 January 2018, "Who does climate modelling around the world?".
- Stott & Kettleborough 2002.
- IPCC AR4 WG1 Ch8 2007, FAQ 8.1.
- Stroeve et al. 2007; National Geographic, 13 August 2019.
- Liepert & Previdi 2009.
- Rahmstorf et al. 2007; Mitchum et al. 2018.
- USGCRP Chapter 15 2017.
- IPCC AR5 SYR Summary for Policymakers 2014, Sec. 2.1.
- IPCC AR5 WG1 Technical Summary 2013, pp. 79–80.
- IPCC AR5 WG1 Technical Summary 2013, p. 57.
- Carbon Brief, 15 January 2018, "What are the inputs and outputs for a climate model?".
- Riahi et al. 2017; Carbon Brief, 19 April 2018.
- IPCC AR5 WG3 Ch5 2014, pp. 379–380.
- Matthews et al. 2009.
- Carbon Brief, 19 April 2018; Meinshausen 2019, p. 462.
- Rogelj et al. 2019.
- IPCC SR15 Summary for Policymakers 2018, p. 12.
- NOAA 2017.
- Hansen et al. 2016; Smithsonian, 26 June 2016.
- USGCRP Chapter 15 2017, p. 415.
- Scientific American, 29 April 2014; Burke & Stott 2017.
- Francis & Vavrus 2012; Sun, Perlwitz & Hoerling 2016; Carbon Brief, 31 January 2019.
- USGCRP Chapter 9 2017, p. 260.
- Zhang et al. 2008.
- IPCC AR5 WG1 Ch11 2013, p. 995; Wang & Overland 2009.
- IPCC SROCC Summary for Policymakers 2019, p. 18.
- Pistone, Eisenman & Ramanathan 2019.
- WCRP Global Sea Level Budget Group 2018.
- IPCC SROCC Ch4 2019, p. 324: GMSL (global mean sea level, red) will rise between 0.43 m (0.29–0.59 m, likely range) (RCP2.6) and 0.84 m (0.61–1.10 m, likely range) (RCP8.5) by 2100 (medium confidence) relative to 1986–2005.
- DeConto & Pollard 2016.
- Bamber et al. 2019.
- Doney et al. 2009.
- Deutsch et al. 2011
- IPCC SROCC Ch5 2019, p. 510; "Climate Change and Harmful Algal Blooms". EPA. Retrieved 11 September 2020.
- IPCC SR15 Ch3 2018, p. 283.
- "Tipping points in Antarctic and Greenland ice sheets". NESSC. 12 November 2018. Retrieved 25 February 2019.
- Clark et al. 2008.
- Liu et al. 2017.
- National Research Council 2011, p. 14; IPCC AR5 WG1 Ch12 2013, pp. 88–89, FAQ 12.3.
- IPCC AR5 WG1 Ch12 2013, p. 1112.
- Crucifix 2016
- Smith et al. 2009; Levermann et al. 2013.
- IPCC SR15 Ch3 2018, p. 218.
- IPCC SRCCL Ch2 2019, p. 133.
- IPCC SRCCL Summary for Policymakers 2019, p. 7; Zeng & Yoon 2009.
- Turner et al. 2020, p. 1.
- Urban 2015.
- Poloczanska et al. 2013.
- Smale et al. 2019.
- UNEP 2010, pp. 4–8.
- IPCC SROCC Ch5 2019, p. 510
- IPCC SROCC Ch5 2019, p. 451.
- "Coral Reef Risk Outlook". National Oceanic and Atmospheric Administration. Retrieved 4 April 2020.
At present, local human activities, coupled with past thermal stress, threaten an estimated 75 percent of the world's reefs. By 2030, estimates predict more than 90% of the world's reefs will be threatened by local human activities, warming, and acidification, with nearly 60% facing high, very high, or critical threat levels.
- Carbon Brief, 7 January 2020.
- IPCC AR5 WG2 Ch28 2014, p. 1596: "Within 50 to 70 years, loss of hunting habitats may lead to elimination of polar bears from seasonally ice-covered areas, where two-thirds of their world population currently live."
- "What a changing climate means for Rocky Mountain National Park". National Park Service. Retrieved 9 April 2020.
- IPCC AR5 WG2 Ch18 2014, pp. 983, 1008.
- IPCC AR5 WG2 Ch19 2014, p. 1077.
- IPCC AR4 SYR 2007, Section 3.3.3: Especially affected systems, sectors and regions Archived 23 December 2018 at the Wayback Machine.
- IPCC AR5 WG2 Ch11 2014, pp. 720–723.
- Costello et al. 2009; Watts et al. 2015; IPCC AR5 WG2 Ch11 2014, p. 713
- Watts et al. 2019, pp. 1836, 1848.
- Watts et al. 2019, pp. 1841, 1847.
- WHO 2014
- Springmann et al. 2016, p. 2; Haines & Ebi 2019
- IPCC SRCCL Ch5 2019, p. 451.
- Zhao et al. 2017
- IPCC SRCCL Ch5 2019, p. 439.
- IPCC AR5 WG2 Ch7 2014, p. 488
- IPCC SRCCL Ch5 2019, p. 5.
- IPCC SROCC Ch5 2019, p. 503.
- Holding et al. 2016; IPCC AR5 WG2 Ch3 2014, pp. 232–233.
- DeFries et al. 2019, p. 3; Krogstrup & Oman 2019, p. 10.
- Diffenbaugh & Burke 2019; The Guardian, 26 January 2015; Burke, Davis & Diffenbaugh 2018.
- IPCC AR5 WG2 Ch13 2014, pp. 796–797.
- Hallegatte et al. 2016, p. 12.
- IPCC AR5 WG2 Ch13 2014, p. 796.
- IPCC SROCC Ch4 2019, p. 328.
- UNHCR 2011, p. 3.
- Matthews 2018, p. 399.
- Xu C, Kohler TA, Lenton TM, Svenning JC, Scheffer M (2020). "Future of the human climate niche". Proc Natl Acad Sci U S A. 117 (21): 11350–11355. doi:10.1073/pnas.1910114117. PMC 7260949. PMID 32366654.CS1 maint: multiple names: authors list (link)
- Cattaneo et al. 2019; UN Environment, 25 October 2018.
- Brown, Oli, MRS No. 31 - Migration and Climate Change, International Organization for Migration, retrieved 8 October 2020
- Kaczan, David J.; Orgill-Meyer, Jennifer (2020). "The impact of climate change on migration: a synthesis of recent empirical insights". Climatic Change. 158 (3–4): 281–300. Bibcode:2020ClCh..158..281K. doi:10.1007/s10584-019-02560-0. S2CID 207988694. Retrieved 8 October 2020.
- Serdeczny et al. 2016.
- IPCC SRCCL Ch5 2019, pp. 439, 464.
- National Oceanic and Atmospheric Administration. "What is nuisance flooding?". Retrieved 8 April 2020.
- Kabir et al. 2016.
- Van Oldenborgh et al. 2019.
- IPCC AR5 SYR Summary for Policymakers 2014, p. 17, Section 3.
- Gordijn & ten Have 2012
- IPCC AR5 SYR Glossary 2014, p. 125.
- IPCC SR15 Summary for Policymakers 2018, pp. 13–15.
- IPCC SR15 Summary for Policymakers 2018, p. 15.
- United Nations Environment Programme 2019, Table ES.1.
- Friedlingstein et al. 2019.
- United Nations Environment Programme 2019, p. 46.
- REN21 2020, p. 32, Fig.1.
- Teske, ed. 2019, p. xxiii.
- Teske et al. 2019, p. 163, Table 7.1.
- Ritchie 2019; United Nations Environment Programme 2019, p. XXIV, Fig.ES.5
- The Guardian, 6 April 2020.
- Berrill et al. 2016.
- United Nations Environment Programme 2019, p. 46.
- Vox, 20 September 2019.
- Union of Concerned Scientists, 5 March 2013.
- IPCC SR15 Ch4 2018, pp. 324–325.
- Geyer, Stoms & Kallaos 2013.
- "Hydropower". iea.org. International Energy Agency. Retrieved 12 October 2020.
Hydropower generation is estimated to have increased by over 2% in 2019 owing to continued recovery from drought in Latin America as well as strong capacity expansion and good water availability in China (...) capacity expansion has been losing speed. This downward trend is expected to continue, due mainly to less large-project development in China and Brazil, where concerns over social and environmental impacts have restricted projects.
- Dunai, Marton; De Clercq, Geert (23 September 2019). "Nuclear energy too slow, too expensive to save climate: report". Reuters.
The cost of generating solar power ranges from $36 to $44 per megawatt hour (MWh), the WNISR said, while onshore wind power comes in at $29–$56 per MWh. Nuclear energy costs between $112 and $189. Over the past decade, (costs) for utility-scale solar have dropped by 88% and for wind by 69%. For nuclear, they have increased by 23%.
- IPCC SR15 Ch4 2018, pp. 326–327; Bednar, Obersteiner & Wagner 2019; European Commission, 28 November 2018, p. 188.
- Bui et al. 2018, p. 1068.
- World Resources Institute, 8 August 2019: IPCC SRCCL Ch2 2019, pp. 189–193.
- IPCC SR15 Ch4 2018, pp. 327–330.
- Krause et al. 2018, pp. 3026–3027.
- IPCC SR15 Ch2 2018, p. 109.
- Teske, ed. 2019, p. xxiii.
- World Resources Institute, 8 August 2019.
- Bui et al. 2018, p. 1068; IPCC SR15 Summary for Policymakers 2018, p. 17.
- United Nations Environment Programme 2019, Table ES.3; Teske, ed. 2019, p. xxvii, Fig.5.
- IPCC SR15 Ch2 2018, p. 131, Figure 2.15; Teske 2019, pp. 409–410.
- IPCC SR15 Ch2 2018, pp. 142–144; United Nations Environment Programme 2019, Table ES.3 & p.49.
- IPCC AR5 WG3 Ch9 2014, pp. 686–694.
- BBC, 17 December 2018.
- IPCC AR5 WG3 Ch10 2014, pp. 753–762; IRENA 2019, p. 49.
- World Resources Institute, December 2019, p. 1.
- World Resources Institute, December 2019, p. 10.
- New York Times, 1 January 2020; Druckman & Jackson 2016, Fig. 9.3.
- Union of Concerned Scientists, 8 January 2017; Hagmann, Ho & Loewenstein 2019.
- World Bank, June 2019, p. 12, Box 1.
- National Conference of State Legislators, 17 April 2020; European Parliament, February 2020.
- REN21 2019, p. 34.
- Global Subsidies Initiative 2019, p. iv
- International Institute for Sustainable Development 2019, p. iv.
- ICCT 2019, p. iv; Natural Resources Defense Council, 29 September 2017.
- Watts et al. 2019, pp. 1856-1858; WHO 2018, p. 27
- WHO 2018, p. 16–17.
- WHO 2018, p. 27.
- Nat Commun, 22 November 2018 harvnb error: no target: CITEREFNat_Commun,_22_November2018 (help)
- Carbon Brief, 4 Jan 2017.
- Pacific Environment, 3 October 2018; Ristroph 2019.
- UNCTAD 2009.
- IPCC SR15 Ch4 2018, pp. 396-397.
- IPCC AR5 SYR 2014, p. 112.
- IPCC SR15 Ch5 2018, p. 457.
- NASA's Global Climate Change. "Global climate change adaptation and mitigation". Climate Change: Vital Signs of the Planet. Archived from the original on 3 April 2019. Retrieved 12 April 2019.
- Cole 2008.
- IPCC AR4 WG2 Ch19 2007, p. 796.
- Doelle, Meinhard; Seck, Sara (2 July 2020). "Loss & damage from climate change: from concept to remedy?". Climate Policy. 20 (6): 669–680. doi:10.1080/14693062.2019.1630353. ISSN 1469-3062. S2CID 202329481.
- IPCC AR5 SYR 2014, p. 54.
- The Royal Society 2009; Gardiner & McKinnon 2019.
- Lawrence et al. 2018.
- Friedlingstein et al. 2019, Table 7.
- Mercure et al. 2018.
- Rauner et al. 2020.
- O'Sullivan, Overland & Sandalow 2017, pp. 11–12.
- UNFCCC, "What is the United Nations Framework Convention on Climate Change?"
- UNFCCC 1992, Article 2.
- IPCC AR4 WG3 Ch1 2007, Executive summary.
- UNFCCC, "What are United Nations Climate Change Conferences?".
- Ritchie, Roser, Mispy, Ortiz-Ospina (2018) "Measuring progress towards the Sustainable Development Goals." (SDG 13) SDG Tracker.
- United Nations (2017) Resolution adopted by the General Assembly on 6 July 2017, Work of the Statistical Commission pertaining to the 2030 Agenda for Sustainable Development (A/RES/71/313)
- Kyoto Protocol 1997; Liverman 2009, p. 290.
- Müller 2010; The New York Times, 25 May 2015; UNFCCC: Copenhagen 2009.
- Dessai 2001, p. 4; Grubb 2003.
- Liverman 2009, p. 290.
- EUobserver, 20 December 2009.
- UNFCCC: Copenhagen 2009.
- Paris Agreement 2015.
- Climate Focus 2015, p. 3; Carbon Brief, 8 October 2018.
- Climate Focus 2015, p. 5.
- "Status of Treaties, United Nations Framework Convention on Climate Change". United Nations Treaty Collection. Retrieved 20 November 2019.; Salon, 25 September 2019.
- BBC, 4 November 2020.
- BBC, 1 May 2019; Vice, 2 May 2019.
- The Verge, 27 December 2019.
- The Guardian, 28 November 2019
- Forbes, 3 February 2020.
- Goyal et al. 2019.
- UN Environment, 20 November 2017.
- Cook et al. 2016.
- "Scientific Consensus: Earth's Climate is Warming". NASA. Retrieved 30 October 2020.
- Powell, James (20 November 2019). "Scientists Reach 100% Consensus on Anthropogenic Global Warming". Bulletin of Science, Technology & Society. 37 (4): 183–184. doi:10.1177/0270467619886266. S2CID 213454806. Retrieved 15 November 2020.
- NRC 2008, p. 2; Oreskes 2007, p. 68; Gleick, 7 January 2017
- Joint statement of the G8+5 Academies (2009); Gleick, 7 January 2017.
- Royal Society 2005.
- IPCC AR5 WG1 Summary for Policymakers 2013, p. 17, D.3.
- IPCC SR15 Ch1 2018, p. 53.
- Ripple et al. 2017; Ripple et al. 2019; The Independent, 5 November 2019.
- Weart "The Public and Climate Change (since 1980)".
- Newell 2006, p. 80; Yale Climate Connections, 2 November 2010.
- Pew Research Center 2015.
- Gallup, 20 April 2011.
- Pew Research Center, 24 June 2013.
- NW, 1615 L. St; Suite 800Washington; Inquiries, DC 20036USA202-419-4300 | Main202-857-8562 | Fax202-419-4372 | Media (23 June 2020). "Two-Thirds of Americans Think Government Should Do More on Climate". Pew Research Center Science & Society. Retrieved 24 November 2020.
- Stover 2014.
- Dunlap & McCright 2011, pp. 144, 155; Björnberg et al. 2017.
- Oreskes & Conway 2010; Björnberg et al. 2017.
- O’Neill & Boykoff 2010; Björnberg et al. 2017.
- Björnberg et al. 2017.
- Dunlap & McCright 2015, p. 308.
- Dunlap & McCright 2011, p. 146.
- Harvey et al. 2018.
- The New York Times, 29 April 2017.
- Gunningham 2018.
- The Guardian, 19 March 2019; Boulianne, Lalancette & Ilkiw 2020.
- Deutsche Welle, 22 June 2019.
- Setzer & Byrnes 2019.
- Archer & Pierrehumbert 2013, pp. 10–14.
- Tyndall 1861.
- Archer & Pierrehumbert 2013, pp. 39–42; Fleming 2008, Tyndall. In 1856 Eunice Newton Foote experimented using glass cylinders filled with different gases heated by sunlight, but her apparatus could not distinguish the infrared greenhouse effect. She found moist air warmed more than dry air, and CO
2 warmed most, so she concluded higher levels of this in the past would have increased temperatures: Huddleston 2019.
- Lapenis 1998.
- Weart "The Carbon Dioxide Greenhouse Effect"; Fleming 2008, Arrhenius.
- Callendar 1938; Fleming 2007.
- Weart "Suspicions of a Human-Caused Greenhouse (1956–1969)".
- Weart "The Public and Climate Change: The Summer of 1988", "News reporters gave only a little attention ...".
- Weart 2013, p. 3567.
- NASA, 5 December 2008.
- Joo et al. 2015.
- NOAA, 17 June 2015: "when scientists or public leaders talk about global warming these days, they almost always mean human-caused warming"; IPCC AR5 SYR Glossary 2014, p. 120: "Climate change refers to a change in the state of the climate that can be identified (e.g., by using statistical tests) by changes in the mean and/or the variability of its properties and that persists for an extended period, typically decades or longer. Climate change may be due to natural internal processes or external forcings such as modulations of the solar cycles, volcanic eruptions and persistent anthropogenic changes in the composition of the atmosphere or in land use."
- NASA, 7 July 2020; Shaftel 2016: " 'Climate change' and 'global warming' are often used interchangeably but have distinct meanings. ... Global warming refers to the upward temperature trend across the entire Earth since the early 20th century ... Climate change refers to a broad range of global phenomena ...[which] include the increased temperature trends described by global warming."; Associated Press, 22 September 2015: "The terms global warming and climate change can be used interchangeably. Climate change is more accurate scientifically to describe the various effects of greenhouse gases on the world because it includes extreme weather, storms and changes in rainfall patterns, ocean acidification and sea level.".
- Hodder & Martin 2009; BBC Science Focus Magazine, 3 February 2020.
- The Guardian, 17 May 2019; BBC Science Focus Magazine, 3 February 2020.
- USA Today, 21 November 2019.
AR4 Working Group I Report
- IPCC (2007). Solomon, S.; Qin, D.; Manning, M.; Chen, Z.; et al. (eds.). Climate Change 2007: The Physical Science Basis. Contribution of Working Group I to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change. Cambridge University Press. ISBN 978-0-521-88009-1. (pb: 978-0-521-70596-7).
- Le Treut, H.; Somerville, R.; Cubasch, U.; Ding, Y.; et al. (2007). "Chapter 1: Historical Overview of Climate Change Science" (PDF). IPCC AR4 WG1 2007. pp. 93–127.
- Randall, D. A.; Wood, R. A.; Bony, S.; Colman, R.; et al. (2007). "Chapter 8: Climate Models and their Evaluation" (PDF). IPCC AR4 WG1 2007. pp. 589–662.
- Hegerl, G. C.; Zwiers, F. W.; Braconnot, P.; Gillett, N. P.; et al. (2007). "Chapter 9: Understanding and Attributing Climate Change" (PDF). IPCC AR4 WG1 2007. pp. 663–745.
AR4 Working Group II Report
- IPCC (2007). Parry, M. L.; Canziani, O. F.; Palutikof, J. P.; van der Linden, P. J.; et al. (eds.). Climate Change 2007: Impacts, Adaptation and Vulnerability. Contribution of Working Group II to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change. Cambridge University Press. ISBN 978-0-521-88010-7. (pb: 978-0-521-70597-4).
- Rosenzweig, C.; Casassa, G.; Karoly, D. J.; Imeson, A.; et al. (2007). "Chapter 1: Assessment of observed changes and responses in natural and managed systems" (PDF). IPCC AR4 WG2 2007. pp. 79–131.
- Schneider, S. H.; Semenov, S.; Patwardhan, A.; Burton, I.; et al. (2007). "Chapter 19: Assessing key vulnerabilities and the risk from climate change" (PDF). IPCC AR4 WG2 2007. pp. 779–810.
AR4 Working Group III Report
- IPCC (2007). Metz, B.; Davidson, O. R.; Bosch, P. R.; Dave, R.; et al. (eds.). Climate Change 2007: Mitigation of Climate Change. Contribution of Working Group III to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change. Cambridge University Press. ISBN 978-0-521-88011-4. (pb: 978-0-521-70598-1).
AR4 Synthesis Report
- IPCC (2007). Core Writing Team; Pachuri, R. K.; Reisinger, A. (eds.). Climate Change 2007: Synthesis Report. Contribution of Working Groups I, II and III to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change. IPCC. ISBN 978-92-9169-122-7.
AR5 Working Group I Report
- IPCC (2013). Stocker, T. F.; Qin, D.; Plattner, G.-K.; Tignor, M.; et al. (eds.). Climate Change 2013: The Physical Science Basis (PDF). Contribution of Working Group I to the Fifth Assessment Report of the Intergovernmental Panel on Climate Change. Cambridge, United Kingdom and New York, NY, USA: Cambridge University Press. ISBN 978-1-107-05799-9. (pb: 978-1-107-66182-0). https://www.ipcc.ch/report/ar5/wg1/
- IPCC (2013). "Summary for Policymakers" (PDF). IPCC AR5 WG1 2013.
- Stocker, T. F.; Qin, D.; Plattner, G.-K.; Alexander, L. V.; et al. (2013). "Technical Summary" (PDF). IPCC AR5 WG1 2013. pp. 33–115.
- Hartmann, D. L.; Klein Tank, A. M. G.; Rusticucci, M.; Alexander, L. V.; et al. (2013). "Chapter 2: Observations: Atmosphere and Surface" (PDF). IPCC AR5 WG1 2013. pp. 159–254.
- Rhein, M.; Rintoul, S. R.; Aoki, S.; Campos, E.; et al. (2013). "Chapter 3: Observations: Ocean" (PDF). IPCC AR5 WG1 2013. pp. 255–315.
- Masson-Delmotte, V.; Schulz, M.; Abe-Ouchi, A.; Beer, J.; et al. (2013). "Chapter 5: Information from Paleoclimate Archives" (PDF). IPCC AR5 WG1 2013. pp. 383–464.
- Bindoff, N. L.; Stott, P. A.; AchutaRao, K. M.; Allen, M. R.; et al. (2013). "Chapter 10: Detection and Attribution of Climate Change: from Global to Regional" (PDF). IPCC AR5 WG1 2013. pp. 867–952.
- Kirtman, B.; Power, S.; Adedoyin, J. A.; Boer, G. J.; et al. (2013). "Chapter 11: Near-term Climate Change: Projections and Predictability" (PDF). IPCC AR5 WG1 2013. pp. 953–1028.
- Collins, M.; Knutti, R.; Arblaster, J. M.; Dufresne, J.-L.; et al. (2013). "Chapter 12: Long-term Climate Change: Projections, Commitments and Irreversibility" (PDF). IPCC AR5 WG1 2013. pp. 1029–1136.
AR5 Working Group II Report
- IPCC (2014). Field, C. B.; Barros, V. R.; Dokken, D. J.; Mach, K. J.; et al. (eds.). Climate Change 2014: Impacts, Adaptation, and Vulnerability. Part A: Global and Sectoral Aspects. Contribution of Working Group II to the Fifth Assessment Report of the Intergovernmental Panel on Climate Change. Cambridge University Press. ISBN 978-1-107-05807-1. (pb: 978-1-107-64165-5). Chapters 1–20, SPM, and Technical Summary.
- Jiménez Cisneros, B. E.; Oki, T.; Arnell, N. W.; Benito, G.; et al. (2014). "Chapter 3: Freshwater Resources" (PDF). IPCC AR5 WG2 A 2014. pp. 229–269.
- Porter, J. R.; Xie, L.; Challinor, A. J.; Cochrane, K.; et al. (2014). "Chapter 7: Food Security and Food Production Systems" (PDF). IPCC AR5 WG2 A 2014. pp. 485–533.
- Smith, K. R.; Woodward, A.; Campbell-Lendrum, D.; Chadee, D. D.; et al. (2014). "Chapter 11: Human Health: Impacts, Adaptation, and Co-Benefits" (PDF). In IPCC AR5 WG2 A 2014. pp. 709–754.
- Olsson, L.; Opondo, M.; Tschakert, P.; Agrawal, A.; et al. (2014). "Chapter 13: Livelihoods and Poverty" (PDF). IPCC AR5 WG2 A 2014. pp. 793–832.
- Cramer, W.; Yohe, G. W.; Auffhammer, M.; Huggel, C.; et al. (2014). "Chapter 18: Detection and Attribution of Observed Impacts" (PDF). IPCC AR5 WG2 A 2014. pp. 979–1037.
- Oppenheimer, M.; Campos, M.; Warren, R.; Birkmann, J.; et al. (2014). "Chapter 19: Emergent Risks and Key Vulnerabilities" (PDF). IPCC AR5 WG2 A 2014. pp. 1039–1099.
- IPCC (2014). Barros, V. R.; Field, C. B.; Dokken, D. J.; Mach, K. J.; et al. (eds.). Climate Change 2014: Impacts, Adaptation, and Vulnerability. Part B: Regional Aspects (PDF). Contribution of Working Group II to the Fifth Assessment Report of the Intergovernmental Panel on Climate Change. Cambridge, United Kingdom and New York, NY, USA: Cambridge University Press. ISBN 978-1-107-05816-3. (pb: 978-1-107-68386-0). Chapters 21–30, Annexes, and Index.
AR5 Working Group III Report
- IPCC (2014). Edenhofer, O.; Pichs-Madruga, R.; Sokona, Y.; Farahani, E.; et al. (eds.). Climate Change 2014: Mitigation of Climate Change. Contribution of Working Group III to the Fifth Assessment Report of the Intergovernmental Panel on Climate Change. Cambridge, United Kingdom and New York, NY, USA: Cambridge University Press. ISBN 978-1-107-05821-7. (pb: 978-1-107-65481-5).
- Blanco, G.; Gerlagh, R.; Suh, S.; Barrett, J.; et al. (2014). "Chapter 5: Drivers, Trends and Mitigation" (PDF). IPCC AR5 WG3 2014. pp. 351–411.
- Lucon, O.; Ürge-Vorsatz, D.; Ahmed, A.; Akbari, H.; et al. (2014). "Chapter 9: Buildings" (PDF). IPCC AR5 WG3 2014.
- Fischedick, M.; Roy, J.; Abdel-Aziz, A.; Acquaye, A.; et al. (2014). "Chapter 10: Industry" (PDF). IPCC AR5 WG3 2014.
AR5 Synthesis Report
- IPCC AR5 SYR (2014). The Core Writing Team; Pachauri, R. K.; Meyer, L. A. (eds.). Climate Change 2014: Synthesis Report. Contribution of Working Groups I, II and III to the Fifth Assessment Report of the Intergovernmental Panel on Climate Change. Geneva, Switzerland: IPCC.
Special Report: Global Warming of 1.5 °C
- IPCC (2018). Masson-Delmotte, V.; Zhai, P.; Pörtner, H.-O.; Roberts, D.; et al. (eds.). Global Warming of 1.5°C. An IPCC Special Report on the impacts of global warming of 1.5°C above pre-industrial levels and related global greenhouse gas emission pathways, in the context of strengthening the global response to the threat of climate change, sustainable development, and efforts to eradicate poverty (PDF). Intergovernmental Panel on Climate Change. https://www.ipcc.ch/sr15/.
- IPCC (2018). "Summary for Policymakers" (PDF). IPCC SR15 2018. pp. 3–24.
- Allen, M. R.; Dube, O. P.; Solecki, W.; Aragón-Durand, F.; et al. (2018). "Chapter 1: Framing and Context" (PDF). IPCC SR15 2018. pp. 49–91.
- Rogelj, J.; Shindell, D.; Jiang, K.; Fifta, S.; et al. (2018). "Chapter 2: Mitigation Pathways Compatible with 1.5°C in the Context of Sustainable Development" (PDF). IPCC SR15 2018. pp. 93–174.
- Hoegh-Guldberg, O.; Jacob, D.; Taylor, M.; Bindi, M.; et al. (2018). "Chapter 3: Impacts of 1.5ºC Global Warming on Natural and Human Systems" (PDF). IPCC SR15 2018. pp. 175–311.
- de Coninck, H.; Revi, A.; Babiker, M.; Bertoldi, P.; et al. (2018). "Chapter 4: Strengthening and Implementing the Global Response" (PDF). IPCC SR15 2018. pp. 313–443.
- Roy, J.; Tschakert, P.; Waisman, H.; Abdul Halim, S.; et al. (2018). "Chapter 5: Sustainable Development, Poverty Eradication and Reducing Inequalities" (PDF). IPCC SR15 2018. pp. 445–538.
Special Report: Climate change and Land
- IPCC (2019). Shukla, P. R.; Skea, J.; Calvo Buendia, E.; Masson-Delmotte, V.; et al. (eds.). IPCC Special Report on Climate Change, Desertification, Land Degradation, Sustainable Land Management, Food Security, and Greenhouse gas fluxes in Terrestrial Ecosystems (PDF). In press.
- IPCC (2019). "Summary for Policymakers" (PDF). IPCC SRCCL 2019. pp. 3–34.
- Jia, G.; Shevliakova, E.; Artaxo, P. E.; De Noblet-Ducoudré, N.; et al. (2019). "Chapter 2: Land-Climate Interactions" (PDF). IPCC SRCCL 2019. pp. 131–247.
- Mbow, C.; Rosenzweig, C.; Barioni, L. G.; Benton, T.; et al. (2019). "Chapter 5: Food Security" (PDF). IPCC SRCCL 2019. pp. 437–550.
Special Report: The Ocean and Cryosphere in a Changing Climate
- IPCC (2019). Pörtner, H.-O.; Roberts, D. C.; Masson-Delmotte, V.; Zhai, P.; et al. (eds.). IPCC Special Report on the Ocean and Cryosphere in a Changing Climate (PDF). In press.
- IPCC (2019). "Summary for Policymakers" (PDF). IPCC SROCC 2019. pp. 3–35.
- Oppenheimer, M.; Glavovic, B.; Hinkel, J.; van de Wal, R.; et al. (2019). "Chapter 4: Sea Level Rise and Implications for Low Lying Islands, Coasts and Communities" (PDF). IPCC SROCC 2019. pp. 321–445.
- Bindoff, N. L.; Cheung, W. W. L.; Kairo, J. G.; Arístegui, J.; et al. (2019). "Chapter 5: Changing Ocean, Marine Ecosystems, and Dependent Communities" (PDF). IPCC SROCC 2019. pp. 447–587.
Other peer-reviewed sources
- Albrecht, Bruce A. (1989). "Aerosols, Cloud Microphysics, and Fractional Cloudiness". Science. 245 (4923): 1227–1239. Bibcode:1989Sci...245.1227A. doi:10.1126/science.245.4923.1227. PMID 17747885. S2CID 46152332.
- Bajzelj, B.; Allwood, J.; Cullen, J. (2013). "Designing Climate Change Mitigation Plans That Add Up". Environmental Science and Technology. 47 (14): 8062–8069. Bibcode:2013EnST...47.8062B. doi:10.1021/es400399h. PMC 3797518. PMID 23799265.
- Bamber, Jonathan L.; Oppenheimer, Michael; Kopp, Robert E.; Aspinall, Willy P.; Cooke, Roger M. (2019). "Ice sheet contributions to future sea-level rise from structured expert judgment". Proceedings of the National Academy of Sciences. 116 (23): 11195–11200. Bibcode:2019PNAS..11611195B. doi:10.1073/pnas.1817205116. ISSN 0027-8424. PMC 6561295. PMID 31110015.
- Bednar, Johannes; Obersteiner, Michael; Wagner, Fabian (2019). "On the financial viability of negative emissions". Nature Communications. 10 (1): 1783. Bibcode:2019NatCo..10.1783B. doi:10.1038/s41467-019-09782-x. ISSN 2041-1723. PMC 6467865. PMID 30992434.
- Berrill, P.; Arvesen, A.; Scholz, Y.; Gils, H. C.; et al. (2016). "Environmental impacts of high penetration renewable energy scenarios for Europe". Environmental Research Letters. 11 (1): 014012. Bibcode:2016ERL....11a4012B. doi:10.1088/1748-9326/11/1/014012.
- Björnberg, Karin Edvardsson; Karlsson, Mikael; Gilek, Michael; Hansson, Sven Ove (2017). "Climate and environmental science denial: A review of the scientific literature published in 1990–2015". Journal of Cleaner Production. 167: 229–241. doi:10.1016/j.jclepro.2017.08.066. ISSN 0959-6526.
- Boulianne, Shelley; Lalancette, Mireille; Ilkiw, David (2020). ""School Strike 4 Climate": Social Media and the International Youth Protest on Climate Change". Media and Communication. 8 (2): 208–218. doi:10.17645/mac.v8i2.2768. ISSN 2183-2439.
- Bui, M.; Adjiman, C.; Bardow, A.; Anthony, Edward J.; et al. (2018). "Carbon capture and storage (CCS): the way forward". Energy & Environmental Science. 11 (5): 1062–1176. doi:10.1039/c7ee02342a.
- Burke, Claire; Stott, Peter (2017). "Impact of Anthropogenic Climate Change on the East Asian Summer Monsoon". Journal of Climate. 30 (14): 5205–5220. arXiv:1704.00563. Bibcode:2017JCli...30.5205B. doi:10.1175/JCLI-D-16-0892.1. ISSN 0894-8755. S2CID 59509210.
- Burke, Marshall; Davis, W. Matthew; Diffenbaugh, Noah S (2018). "Large potential reduction in economic damages under UN mitigation targets". Nature. 557 (7706): 549–553. Bibcode:2018Natur.557..549B. doi:10.1038/s41586-018-0071-9. ISSN 1476-4687. PMID 29795251. S2CID 43936274.
- Callendar, G. S. (1938). "The artificial production of carbon dioxide and its influence on temperature". Quarterly Journal of the Royal Meteorological Society. 64 (275): 223–240. Bibcode:1938QJRMS..64..223C. doi:10.1002/qj.49706427503.
- Cattaneo, Cristina; Beine, Michel; Fröhlich, Christiane J.; Kniveton, Dominic; et al. (2019). "Human Migration in the Era of Climate Change". Review of Environmental Economics and Policy. 13 (2): 189–206. doi:10.1093/reep/rez008. hdl:10.1093/reep/rez008. ISSN 1750-6816. S2CID 198660593.
- Cazenave, Anny; Dieng, Habib-Boubacar; Meyssignac, Benoit; von Schuckmann, Karina; et al. (2014). "The rate of sea-level rise". Nature Climate Change. 4 (5): 358–361. Bibcode:2014NatCC...4..358C. doi:10.1038/nclimate2159. ISSN 1758-6798. S2CID 85396999.
- Cohen, Judah; Screen, James; Furtado, Jason C.; Barlow, Mathew; et al. (2014). "Recent Arctic amplification and extreme mid-latitude weather" (PDF). Nature Geoscience. 7 (9): 627–637. Bibcode:2014NatGe...7..627C. doi:10.1038/ngeo2234. ISSN 1752-0908.
- Cole, Daniel H. (2008). "Climate Change, Adaptation, and Development". UCLA Journal of Environmental Law and Policy. 26 (1).
- Cook, John; Oreskes, Naomi; Doran, Peter T.; Anderegg, William R. L.; et al. (2016). "Consensus on consensus: a synthesis of consensus estimates on human-caused global warming". Environmental Research Letters. 11 (4): 048002. Bibcode:2016ERL....11d8002C. doi:10.1088/1748-9326/11/4/048002.
- Costello, Anthony; Abbas, Mustafa; Allen, Adriana; Ball, Sarah; et al. (2009). "Managing the health effects of climate change". The Lancet. 373 (9676): 1693–1733. doi:10.1016/S0140-6736(09)60935-1. PMID 19447250. S2CID 205954939. Archived from the original on 13 August 2017.
- Curtis, P.; Slay, C.; Harris, N.; Tyukavina, A.; et al. (2018). "Classifying drivers of global forest loss". Science. 361 (6407): 1108–1111. Bibcode:2018Sci...361.1108C. doi:10.1126/science.aau3445. PMID 30213911. S2CID 52273353.
- Davidson, Eric (2009). "The contribution of manure and fertilizer nitrogen to atmospheric nitrous oxide since 1860". Nature Geoscience. 2: 659–662. doi:10.1016/j.chemer.2016.04.002.
- DeConto, Robert M.; Pollard, David (2016). "Contribution of Antarctica to past and future sea-level rise". Nature. 531 (7596): 591–597. Bibcode:2016Natur.531..591D. doi:10.1038/nature17145. ISSN 1476-4687. PMID 27029274. S2CID 205247890.
- Dean, Joshua F.; Middelburg, Jack J.; Röckmann, Thomas; Aerts, Rien; et al. (2018). "Methane Feedbacks to the Global Climate System in a Warmer World". Reviews of Geophysics. 56 (1): 207–250. Bibcode:2018RvGeo..56..207D. doi:10.1002/2017RG000559. ISSN 1944-9208.
- Delworth, Thomas L.; Zeng, Fanrong (2012). "Multicentennial variability of the Atlantic meridional overturning circulation and its climatic influence in a 4000 year simulation of the GFDL CM2.1 climate model". Geophysical Research Letters. 39 (13): n/a. Bibcode:2012GeoRL..3913702D. doi:10.1029/2012GL052107. ISSN 1944-8007.
- Deutsch, Curtis; Brix, Holger; Ito, Taka; Frenzel, Hartmut; et al. (2011). "Climate-Forced Variability of Ocean Hypoxia" (PDF). Science. 333 (6040): 336–339. Bibcode:2011Sci...333..336D. doi:10.1126/science.1202422. PMID 21659566. S2CID 11752699. Archived (PDF) from the original on 9 May 2016.
- Diffenbaugh, Noah S.; Burke, Marshall (2019). "Global warming has increased global economic inequality". Proceedings of the National Academy of Sciences. 116 (20): 9808–9813. doi:10.1073/pnas.1816020116. ISSN 0027-8424. PMC 6525504. PMID 31010922.
- Doney, Scott C.; Fabry, Victoria J.; Feely, Richard A.; Kleypas, Joan A. (2009). "Ocean Acidification: The Other CO2 Problem". Annual Review of Marine Science. 1 (1): 169–192. Bibcode:2009ARMS....1..169D. doi:10.1146/annurev.marine.010908.163834. PMID 21141034. S2CID 402398.
- England, Matthew H.; McGregor, Shayne; Spence, Paul; Meehl, Gerald A.; et al. (2014). "Recent intensification of wind-driven circulation in the Pacific and the ongoing warming hiatus" (PDF). Nature Climate Change. 4 (3): 222–227. Bibcode:2014NatCC...4..222E. CiteSeerX 10.1.1.683.5365. doi:10.1038/nclimate2106. Archived (PDF) from the original on 9 August 2017. Retrieved 29 January 2019.
- Fahey, D. W.; Doherty, S. J.; Hibbard, K. A.; Romanou, A.; Taylor, P. C. (2017). "Chapter 2: Physical Drivers of Climate Change" (PDF). In USGCRP2017.
- Knutson, T.; Kossin, J. P.; Mears, C.; Perlwitz, J.; Wehner, M. F. (2017). "Chapter 3: Detection and Attribution of Climate Change" (PDF). In USGCRP2017.
- Fischer, Tobias P.; Aiuppa, Alessandro (2020). "AGU Centennial Grand Challenge: Volcanoes and Deep Carbon Global CO
2 Emissions From Subaerial Volcanism—Recent Progress and Future Challenges". Geochemistry, Geophysics, Geosystems. 21 (3). doi:10.1029/2019GC008690. ISSN 1525-2027.
- Francis, Jennifer A.; Vavrus, Stephen (2012). "Evidence linking Arctic amplification to extreme weather in mid-latitudes". Geophysical Research Letters. 39 (6): n/a. Bibcode:2012GeoRL..39.6801F. doi:10.1029/2012GL051000.
- Franzke, Christian L. E.; Barbosa, Susana; Blender, Richard; Fredriksen, Hege-Beate; et al. (2020). "The Structure of Climate Variability Across Scales". Reviews of Geophysics. 58 (2): e2019RG000657. Bibcode:2020RvGeo..5800657F. doi:10.1029/2019RG000657. ISSN 1944-9208.
- Friedlingstein, Pierre; Jones, Matthew W.; O'Sullivan, Michael; Andrew, Robbie M.; et al. (2019). "Global Carbon Budget 2019". Earth System Science Data. 11 (4): 1783–1838. Bibcode:2019ESSD...11.1783F. doi:10.5194/essd-11-1783-2019. ISSN 1866-3508.
- Fyfe, John C.; Meehl, Gerald A.; England, Matthew H.; Mann, Michael E.; et al. (2016). "Making sense of the early-2000s warming slowdown" (PDF). Nature Climate Change. 6 (3): 224–228. Bibcode:2016NatCC...6..224F. doi:10.1038/nclimate2938. Archived (PDF) from the original on 7 February 2019.
- Gardiner, Stephen; McKinnon, Catriona (2019). "The Justice and Legitimacy of Geoengineering". Critical Review of International Social and Political Philosophy. 23 (5): 557–563. doi:10.1080/13698230.2019.1693157. ISSN 1369-8230.
- Geyer, R.; Stoms, D.; Kallaos, J. (2013). "Spatially-Explicit Life Cycle Assessment of Sun-to-Wheels Transportation Pathways in the U.S.". Environmental Science Technology. 47 (2): 1170–1176. Bibcode:2013EnST...47.1170G. doi:10.1021/es302959h. PMID 23268715.
- Gordijn, Bert; ten Have, Henk (2012). "Ethics of mitigation, adaptation and geoengineering". Medicine, Health Care and Philosophy. 15 (1): 1–2. doi:10.1007/s11019-011-9374-4. ISSN 1572-8633. PMID 22219039.
- Goyal, Rishav; England, Matthew H; Sen Gupta, Alex; Jucker, Martin (2019). "Reduction in surface climate change achieved by the 1987 Montreal Protocol". Environmental Research Letters. 14 (12): 124041. Bibcode:2019ERL....14l4041G. doi:10.1088/1748-9326/ab4874. ISSN 1748-9326.
- Grubb, M. (2003). "The Economics of the Kyoto Protocol" (PDF). World Economics. 4 (3): 144–145. Archived from the original (PDF) on 4 September 2012.
- Gunningham, Neil (2018). "Mobilising civil society: can the climate movement achieve transformational social change?" (PDF). Interface: A Journal for and About Social Movements. 10. Archived (PDF) from the original on 12 April 2019. Retrieved 12 April 2019.
- Hagmann, David; Ho, Emily H.; Loewenstein, George (2019). "Nudging out support for a carbon tax". Nature Climate Change. 9 (6): 484–489. Bibcode:2019NatCC...9..484H. doi:10.1038/s41558-019-0474-0. S2CID 182663891.
- Haines, A.; Ebi, K. (2019). "The Imperative for Climate Action to Protect Health". New England Journal of Medicine. 380 (3): 263–273. doi:10.1056/NEJMra1807873. PMID 30650330. S2CID 58662802.
- Hansen, James; Sato, Makiko; Hearty, Paul; Ruedy, Reto; et al. (2016). "Ice melt, sea level rise and superstorms: evidence from paleoclimate data, climate modeling, and modern observations that 2 °C global warming could be dangerous". Atmospheric Chemistry and Physics. 16 (6): 3761–3812. arXiv:1602.01393. Bibcode:2016ACP....16.3761H. doi:10.5194/acp-16-3761-2016. ISSN 1680-7316. S2CID 9410444.
- Harvey, Jeffrey A.; Van den Berg, Daphne; Ellers, Jacintha; Kampen, Remko; et al. (2018). "Internet Blogs, Polar Bears, and Climate-Change Denial by Proxy". BioScience. 68 (4): 281–287. doi:10.1093/biosci/bix133. ISSN 0006-3568. PMC 5894087. PMID 29662248.
- Hawkins, Ed; Ortega, Pablo; Suckling, Emma; Schurer, Andrew; et al. (2017). "Estimating Changes in Global Temperature since the Preindustrial Period". Bulletin of the American Meteorological Society. 98 (9): 1841–1856. Bibcode:2017BAMS...98.1841H. doi:10.1175/bams-d-16-0007.1. ISSN 0003-0007.
- He, Yanyi; Wang, Kaicun; Zhou, Chunlüe; Wild, Martin (2018). "A Revisit of Global Dimming and Brightening Based on the Sunshine Duration". Geophysical Research Letters. 45 (9): 4281–4289. Bibcode:2018GeoRL..45.4281H. doi:10.1029/2018GL077424. ISSN 1944-8007.
- Hodder, Patrick; Martin, Brian (2009). "Climate Crisis? The Politics of Emergency Framing". Economic and Political Weekly. 44 (36): 53–60. ISSN 0012-9976. JSTOR 25663518.
- Holding, S.; Allen, D. M.; Foster, S.; Hsieh, A.; et al. (2016). "Groundwater vulnerability on small islands". Nature Climate Change. 6 (12): 1100–1103. Bibcode:2016NatCC...6.1100H. doi:10.1038/nclimate3128. ISSN 1758-6798.
- Joo, Gea-Jae; Kim, Ji Yoon; Do, Yuno; Lineman, Maurice (2015). "Talking about Climate Change and Global Warming". PLOS ONE. 10 (9): e0138996. Bibcode:2015PLoSO..1038996L. doi:10.1371/journal.pone.0138996. ISSN 1932-6203. PMC 4587979. PMID 26418127.
- Kabir, Russell; Khan, Hafiz T. A.; Ball, Emma; Caldwell, Khan (2016). "Climate Change Impact: The Experience of the Coastal Areas of Bangladesh Affected by Cyclones Sidr and Aila". Journal of Environmental and Public Health. 2016: 9654753. doi:10.1155/2016/9654753. PMC 5102735. PMID 27867400.
- Kennedy, J. J.; Thorne, W. P.; Peterson, T. C.; Ruedy, R. A.; et al. (2010). Arndt, D. S.; Baringer, M. O.; Johnson, M. R. (eds.). "How do we know the world has warmed?". Special supplement: State of the Climate in 2009. Bulletin of the American Meteorological Society. 91 (7). S26-S27. doi:10.1175/BAMS-91-7-StateoftheClimate.
- Kopp, R. E.; Hayhoe, K.; Easterling, D. R.; Hall, T.; et al. (2017). "Chapter 15: Potential Surprises: Compound Extremes and Tipping Elements". In USGCRP 2017. Archived from the original on 20 August 2018.
- Knight, J.; Kenney, J. J.; Folland, C.; Harris, G.; et al. (2009). "Do Global Temperature Trends Over the Last Decade Falsify Climate Predictions? [in "State of the Climate in 2008"]". Bulletin of the American Meteorological Society. 90 (8): S75–S79. doi:10.1175/BAMS-91-7-StateoftheClimate.
- Kossin, J. P.; Hall, T.; Knutson, T.; Kunkel, K. E.; Trapp, R. J.; Waliser, D. E.; Wehner, M. F. (2017). "Chapter 9: Extreme Storms". In USGCRP2017.
- Knutson, T. (2017). "Appendix C: Detection and attribution methodologies overview.". In USGCRP2017.
- Krause, Andreas; Pugh, Thomas A. M.; Bayer, Anita D.; Li, Wei; et al. (2018). "Large uncertainty in carbon uptake potential of land-based climate-change mitigation efforts". Global Change Biology. 24 (7): 3025–3038. Bibcode:2018GCBio..24.3025K. doi:10.1111/gcb.14144. ISSN 1365-2486. PMID 29569788. S2CID 4919937.
- Kvande, H. (2014). "The Aluminum Smelting Process". Journal of Occupational and Environmental Medicine. 56 (5 Suppl): S2–S4. doi:10.1097/JOM.0000000000000154. PMC 4131936. PMID 24806722.
- Lapenis, Andrei G. (1998). "Arrhenius and the Intergovernmental Panel on Climate Change". Eos. 79 (23): 271. Bibcode:1998EOSTr..79..271L. doi:10.1029/98EO00206.
- Lawrence, Mark G.; Schäfer, Stefan; Muri, Helene; Scott, Vivian; et al. (2018). "Evaluating climate geoengineering proposals in the context of the Paris Agreement temperature goals". Nature Communications. 9 (1): 3734. Bibcode:2018NatCo...9.3734L. doi:10.1038/s41467-018-05938-3. ISSN 2041-1723. PMC 6137062. PMID 30213930.
- Levermann, Anders; Clark, Peter U.; Marzeion, Ben; Milne, Glenn A.; et al. (2013). "The multimillennial sea-level commitment of global warming". Proceedings of the National Academy of Sciences. 110 (34): 13745–13750. Bibcode:2013PNAS..11013745L. doi:10.1073/pnas.1219414110. ISSN 0027-8424. PMC 3752235. PMID 23858443.
- Liepert, Beate G.; Previdi, Michael (2009). "Do Models and Observations Disagree on the Rainfall Response to Global Warming?". Journal of Climate. 22 (11): 3156–3166. Bibcode:2009JCli...22.3156L. doi:10.1175/2008JCLI2472.1.
- Liverman, Diana M. (2009). "Conventions of climate change: constructions of danger and the dispossession of the atmosphere". Journal of Historical Geography. 35 (2): 279–296. doi:10.1016/j.jhg.2008.08.008.
- Liu, Wei; Xie, Shang-Ping; Liu, Zhengyu; Zhu, Jiang (2017). "Overlooked possibility of a collapsed Atlantic Meridional Overturning Circulation in warming climate". Science Advances. 3 (1): e1601666. Bibcode:2017SciA....3E1666L. doi:10.1126/sciadv.1601666. PMC 5217057. PMID 28070560.
- Lüthi, Dieter; Le Floch, Martine; Bereiter, Bernhard; Blunier, Thomas; et al. (2008). "High-resolution carbon dioxide concentration record 650,000–800,000 years before present" (PDF). Nature. 453 (7193): 379–382. Bibcode:2008Natur.453..379L. doi:10.1038/nature06949. PMID 18480821. S2CID 1382081.
- Matthews, H. Damon; Gillett, Nathan P.; Stott, Peter A.; Zickfeld, Kirsten (2009). "The proportionality of global warming to cumulative carbon emissions". Nature. 459 (7248): 829–832. Bibcode:2009Natur.459..829M. doi:10.1038/nature08047. ISSN 1476-4687. PMID 19516338. S2CID 4423773.
- Matthews, Tom (2018). "Humid heat and climate change". Progress in Physical Geography: Earth and Environment. 42 (3): 391–405. doi:10.1177/0309133318776490. S2CID 134820599.
- McNeill, V. Faye (2017). "Atmospheric Aerosols: Clouds, Chemistry, and Climate". Annual Review of Chemical and Biomolecular Engineering. 8 (1): 427–444. doi:10.1146/annurev-chembioeng-060816-101538. ISSN 1947-5438. PMID 28415861.
- Melillo, J. M.; Frey, S. D.; DeAngelis, K. M.; Werner, W. J.; et al. (2017). "Long-term pattern and magnitude of soil carbon feedback to the climate system in a warming world". Science. 358 (6359): 101–105. Bibcode:2017Sci...358..101M. doi:10.1126/science.aan2874. PMID 28983050.
- Mercure, J.-F.; Pollitt, H.; Viñuales, J. E.; Edwards, N. R.; et al. (2018). "Macroeconomic impact of stranded fossil fuel assets" (PDF). Nature Climate Change. 8 (7): 588–593. Bibcode:2018NatCC...8..588M. doi:10.1038/s41558-018-0182-1. ISSN 1758-6798. S2CID 89799744.
- Mitchum, G. T.; Masters, D.; Hamlington, B. D.; Fasullo, J. T.; et al. (2018). "Climate-change–driven accelerated sea-level rise detected in the altimeter era". Proceedings of the National Academy of Sciences. 115 (9): 2022–2025. Bibcode:2018PNAS..115.2022N. doi:10.1073/pnas.1717312115. ISSN 0027-8424. PMC 5834701. PMID 29440401.
- National Research Council (2011). Climate Stabilization Targets: Emissions, Concentrations, and Impacts over Decades to Millennia. Washington, DC: National Academies Press. doi:10.17226/12877. ISBN 978-0-309-15176-4. Archived from the original on 20 July 2010. Retrieved 19 August 2013.
- National Research Council (2011). "Causes and Consequences of Climate Change". America's Climate Choices. Washington, DC: The National Academies Press. doi:10.17226/12781. ISBN 978-0-309-14585-5. Archived from the original on 21 July 2015. Retrieved 28 January 2019.
- Neukom, Raphael; Steiger, Nathan; Gómez-Navarro, Juan José; Wang, Jianghao; et al. (2019). "No evidence for globally coherent warm and cold periods over the preindustrial Common Era" (PDF). Nature. 571 (7766): 550–554. Bibcode:2019Natur.571..550N. doi:10.1038/s41586-019-1401-2. ISSN 1476-4687. PMID 31341300. S2CID 198494930.
- Neukom, Raphael; Barboza, Luis A.; Erb, Michael P.; Shi, Feng; et al. (2019). "Consistent multidecadal variability in global temperature reconstructions and simulations over the Common Era". Nature Geoscience. 12 (8): 643–649. Bibcode:2019NatGe..12..643P. doi:10.1038/s41561-019-0400-0. ISSN 1752-0908. PMC 6675609. PMID 31372180.
- O’Neill, Saffron J.; Boykoff, Max (2010). "Climate denier, skeptic, or contrarian?". Proceedings of the National Academy of Sciences of the United States of America. 107 (39): E151. Bibcode:2010PNAS..107E.151O. doi:10.1073/pnas.1010507107. ISSN 0027-8424. PMC 2947866. PMID 20807754.
- Pistone, Kristina; Eisenman, Ian; Ramanathan, Veerabhadran (2019). "Radiative Heating of an Ice-Free Arctic Ocean". Geophysical Research Letters. 46 (13): 7474–7480. Bibcode:2019GeoRL..46.7474P. doi:10.1029/2019GL082914. ISSN 1944-8007. S2CID 197572148.
- Poloczanska, Elvira S.; Brown, Christopher J.; Sydeman, William J.; Kiessling, Wolfgang; et al. (2013). "Global imprint of climate change on marine life" (PDF). Nature Climate Change. 3 (10): 919–925. Bibcode:2013NatCC...3..919P. doi:10.1038/nclimate1958. ISSN 1758-6798.
- Rahmstorf, Stefan; Cazenave, Anny; Church, John A.; Hansen, James E.; et al. (2007). "Recent Climate Observations Compared to Projections" (PDF). Science. 316 (5825): 709. Bibcode:2007Sci...316..709R. doi:10.1126/science.1136843. PMID 17272686. S2CID 34008905. Archived (PDF) from the original on 6 September 2018.
- Ramanathan, V.; Carmichael, G. (2008). "Global and Regional Climate Changes due to Black Carbon". Nature Geoscience. 1 (4): 221–227. Bibcode:2008NatGe...1..221R. doi:10.1038/ngeo156.
- Randel, William J.; Shine, Keith P.; Austin, John; Barnett, John; et al. (2009). "An update of observed stratospheric temperature trends" (PDF). Journal of Geophysical Research. 114 (D2): D02107. Bibcode:2009JGRD..11402107R. doi:10.1029/2008JD010421.
- Rauner, Sebastian; Bauer, Nico; Dirnaichner, Alois; Van Dingenen, Rita; Mutel, Chris; Luderer, Gunnar (2020). "Coal-exit health and environmental damage reductions outweigh economic impacts". Nature Climate Change. 10 (4): 308–312. Bibcode:2020NatCC..10..308R. doi:10.1038/s41558-020-0728-x. ISSN 1758-6798. S2CID 214619069.
- Riahi, Keywan; van Vuuren, Detlef P.; Kriegler, Elmar; Edmonds, Jae; et al. (2017). "The Shared Socioeconomic Pathways and their energy, land use, and greenhouse gas emissions implications: An overview". Global Environmental Change. 42: 153–168. doi:10.1016/j.gloenvcha.2016.05.009. ISSN 0959-3780.
- Ripple, William J.; Wolf, Christopher; Newsome, Thomas M.; Galetti, Mauro; et al. (2017). "World Scientists' Warning to Humanity: A Second Notice". BioScience. 67 (12): 1026–1028. doi:10.1093/biosci/bix125.
- Ripple, William J.; Wolf, Christopher; Newsome, Thomas M.; Barnard, Phoebe; et al. (2019). "World Scientists' Warning of a Climate Emergency". BioScience. doi:10.1093/biosci/biz088. hdl:1808/30278.
- Ristroph, E. (2019). "Fulfilling Climate Justice And Government Obligations To Alaska Native Villages: What Is The Government Role?". William & Mary Environmental Law and Policy Review. 43 (2).
- Rogelj, Joeri; Forster, Piers M.; Kriegler, Elmar; Smith, Christopher J.; et al. (2019). "Estimating and tracking the remaining carbon budget for stringent climate targets". Nature. 571 (7765): 335–342. Bibcode:2019Natur.571..335R. doi:10.1038/s41586-019-1368-z. ISSN 1476-4687. PMID 31316194. S2CID 197542084.
- Rogelj, Joeri; Meinshausen, Malte; Schaeffer, Michiel; Knutti, Reto; Riahi, Keywan (2015). "Impact of short-lived non-CO
2 mitigation on carbon budgets for stabilizing global warming". Environmental Research Letters. 10 (7): 1–10. doi:10.1088/1748-9326/10/7/075001.
- Samset, B. H.; Sand, M.; Smith, C. J.; Bauer, S. E.; et al. (2018). "Climate Impacts From a Removal of Anthropogenic Aerosol Emissions" (PDF). Geophysical Research Letters. 45 (2): 1020–1029. Bibcode:2018GeoRL..45.1020S. doi:10.1002/2017GL076079. ISSN 1944-8007. PMC 7427631. PMID 32801404.
- Sand, M.; Berntsen, T. K.; von Salzen, K.; Flanner, M. G.; et al. (2015). "Response of Arctic temperature to changes in emissions of short-lived climate forcers". Nature. 6 (3): 286–289. doi:10.1038/nclimate2880.
- Schmidt, Gavin A.; Ruedy, Reto A.; Miller, Ron L.; Lacis, Andy A. (2010). "Attribution of the present-day total greenhouse effect". Journal of Geophysical Research: Atmospheres. 115 (D20): D20106. Bibcode:2010JGRD..11520106S. doi:10.1029/2010JD014287. ISSN 2156-2202. S2CID 28195537.
- Schmidt, Gavin A.; Shindell, Drew T.; Tsigaridis, Kostas (2014). "Reconciling warming trends". Nature Geoscience. 7 (3): 158–160. Bibcode:2014NatGe...7..158S. doi:10.1038/ngeo2105. hdl:2060/20150000726.
- Serdeczny, Olivia; Adams, Sophie; Baarsch, Florent; Coumou, Dim; et al. (2016). "Climate change impacts in Sub-Saharan Africa: from physical changes to their social repercussions" (PDF). Regional Environmental Change. 17 (6): 1585–1600. doi:10.1007/s10113-015-0910-2. ISSN 1436-378X. S2CID 3900505.
- Sévellec, Florian; Drijfhout, Sybren S. (2018). "A novel probabilistic forecast system predicting anomalously warm 2018–2022 reinforcing the long-term global warming trend". Nature Communications. 9 (1): 3024. Bibcode:2018NatCo...9.3024S. doi:10.1038/s41467-018-05442-8. PMC 6092397. PMID 30108213.
- Siegenthaler, Urs; Stocker, Thomas F.; Monnin, Eric; Lüthi, Dieter; et al. (2005). "Stable Carbon Cycle–Climate Relationship During the Late Pleistocene" (PDF). Science. 310 (5752): 1313–1317. Bibcode:2005Sci...310.1313S. doi:10.1126/science.1120130. PMID 16311332.
- Sutton, Rowan T.; Dong, Buwen; Gregory, Jonathan M. (2007). "Land/sea warming ratio in response to climate change: IPCC AR4 model results and comparison with observations". Geophysical Research Letters. 34 (2): L02701. Bibcode:2007GeoRL..3402701S. doi:10.1029/2006GL028164.
- Smale, Dan A.; Wernberg, Thomas; Oliver, Eric C. J.; Thomsen, Mads; Harvey, Ben P. (2019). "Marine heatwaves threaten global biodiversity and the provision of ecosystem services" (PDF). Nature Climate Change. 9 (4): 306–312. Bibcode:2019NatCC...9..306S. doi:10.1038/s41558-019-0412-1. ISSN 1758-6798. S2CID 91471054.
- Smith, Joel B.; Schneider, Stephen H.; Oppenheimer, Michael; Yohe, Gary W.; et al. (2009). "Assessing dangerous climate change through an update of the Intergovernmental Panel on Climate Change (IPCC) 'reasons for concern'". Proceedings of the National Academy of Sciences. 106 (11): 4133–4137. Bibcode:2009PNAS..106.4133S. doi:10.1073/pnas.0812355106. PMC 2648893. PMID 19251662.
- Springmann, M.; Mason-D’Croz, D.; Robinson, S.; Garnett, T.; et al. (2016). "Global and regional health effects of future food production under climate change: a modelling study". Lancet. 387 (10031): 1937–46. doi:10.1016/S0140-6736(15)01156-3. PMID 26947322. S2CID 41851492.
- Stott, Peter A.; Kettleborough, J. A. (2002). "Origins and estimates of uncertainty in predictions of twenty-first century temperature rise". Nature. 416 (6882): 723–726. Bibcode:2002Natur.416..723S. doi:10.1038/416723a. ISSN 1476-4687. PMID 11961551. S2CID 4326593.
- Stroeve, J.; Holland, Marika M.; Meier, Walt; Scambos, Ted; et al. (2007). "Arctic sea ice decline: Faster than forecast". Geophysical Research Letters. 34 (9): L09501. Bibcode:2007GeoRL..3409501S. doi:10.1029/2007GL029703.
- Storelvmo, T.; Phillips, P. C. B.; Lohmann, U.; Leirvik, T.; Wild, M. (2016). "Disentangling greenhouse warming and aerosol cooling to reveal Earth's climate sensitivity" (PDF). Nature Geoscience. 9 (4): 286–289. Bibcode:2016NatGe...9..286S. doi:10.1038/ngeo2670. ISSN 1752-0908.
- Sun, Lantao; Perlwitz, Judith; Hoerling, Martin (2016). "What caused the recent "Warm Arctic, Cold Continents" trend pattern in winter temperatures?". Geophysical Research Letters. 43 (10): 5345–5352. Bibcode:2016GeoRL..43.5345S. doi:10.1002/2016GL069024. ISSN 1944-8007. S2CID 9384933.
- Trenberth, Kevin E.; Fasullo, John T. (2016). "Insights into Earth's Energy Imbalance from Multiple Sources". Journal of Climate. 29 (20): 7495–7505. Bibcode:2016JCli...29.7495T. doi:10.1175/JCLI-D-16-0339.1. OSTI 1537015.
- Turetsky, Merritt R.; Abbott, Benjamin W.; Jones, Miriam C.; Anthony, Katey Walter; et al. (2019). "Permafrost collapse is accelerating carbon release". Nature. 569 (7754): 32–34. Bibcode:2019Natur.569...32T. doi:10.1038/d41586-019-01313-4. PMID 31040419.
- Turner, Monica G.; Calder, W. John; Cumming, Graeme S.; Hughes, Terry P.; et al. (2020). "Climate change, ecosystems and abrupt change: science priorities". Philosophical Transactions of the Royal Society B. 375 (1794). doi:10.1098/rstb.2019.0105. PMC 7017767. PMID 31983326.
- Twomey, S. (1977). "The Influence of Pollution on the Shortwave Albedo of Clouds". J. Atmos. Sci. 34 (7): 1149–1152. Bibcode:1977JAtS...34.1149T. doi:10.1175/1520-0469(1977)034<1149:TIOPOT>2.0.CO;2. ISSN 1520-0469.
- Tyndall, John (1861). "On the Absorption and Radiation of Heat by Gases and Vapours, and on the Physical Connection of Radiation, Absorption, and Conduction". Philosophical Magazine. 4. 22: 169–194, 273–285. Archived from the original on 26 March 2016.
- UNEP (2010). UNEP Emerging Issues: Environmental Consequences of Ocean Acidification: A Threat to Food Security (PDF). Nairobi, Kenya: United Nations Environment Programme (UNEP). Archived from the original (PDF) on 7 April 2015..
- Urban, Mark C. (2015). "Accelerating extinction risk from climate change". Science. 348 (6234): 571–573. Bibcode:2015Sci...348..571U. doi:10.1126/science.aaa4984. ISSN 0036-8075. PMID 25931559.
- USGCRP (2009). Karl, T. R.; Melillo, J.; Peterson, T.; Hassol, S. J. (eds.). Global Climate Change Impacts in the United States. Cambridge University Press. ISBN 978-0-521-14407-0. Archived from the original on 6 April 2010. Retrieved 17 April 2010.
- USGCRP (2017). Wuebbles, D. J.; Fahey, D. W.; Hibbard, K. A.; Dokken, D. J.; et al. (eds.). Climate Science Special Report: Fourth National Climate Assessment, Volume I. Washington, DC: U.S. Global Change Research Program. doi:10.7930/J0J964J6.
- Vandyck, T.; Keramidas, K.; et al. (2018). "Air quality co-benefits for human health and agriculture counterbalance costs to meet Paris Agreement pledges". Nat Commun. 9 (4939): 4939. Bibcode:2018NatCo...9.4939V. doi:10.1038/s41467-018-06885-9. PMC 6250710. PMID 30467311.
- Wuebbles, D. J.; Easterling, D. R.; Hayhoe, K.; Knutson, T.; et al. (2017). "Chapter 1: Our Globally Changing Climate" (PDF). In USGCRP2017.
- Walsh, John; Wuebbles, Donald; Hayhoe, Katherine; Kossin, Kossin; et al. (2014). "Appendix 3: Climate Science Supplement" (PDF). Climate Change Impacts in the United States: The Third National Climate Assessment. US National Climate Assessment.
- Wang, M.; Overland, J. E. (2009). "A sea ice free summer Arctic within 30 years?". Geophysical Research Letters. 36 (7): n/a. Bibcode:2009GeoRL..36.7502W. doi:10.1029/2009GL037820. Archived from the original on 19 January 2012.
- Wang, Bin; Shugart, Herman H.; Lerdau, Manuel T. (2017). "Sensitivity of global greenhouse gas budgets to tropospheric ozone pollution mediated by the biosphere". Environmental Research Letters. 12 (8): 084001. Bibcode:2017ERL....12h4001W. doi:10.1088/1748-9326/aa7885. ISSN 1748-9326.
- Watts, Nick; Adger, W Neil; Agnolucci, Paolo; Blackstock, Jason; et al. (2015). "Health and climate change: policy responses to protect public health". The Lancet. 386 (10006): 1861–1914. doi:10.1016/S0140-6736(15)60854-6. hdl:10871/20783. PMID 26111439. S2CID 205979317. Archived from the original on 7 April 2017.
- Watts, Nick; Amann, Markus; Arnell, Nigel; Ayeb-Karlsson, Sonja; et al. (2019). "The 2019 report of The Lancet Countdown on health and climate change: ensuring that the health of a child born today is not defined by a changing climate". The Lancet. 394 (10211): 1836–1878. doi:10.1016/S0140-6736(19)32596-6. ISSN 0140-6736. PMID 31733928. S2CID 207976337.
- WCRP Global Sea Level Budget Group (2018). "Global sea-level budget 1993–present". Earth System Science Data. 10 (3): 1551–1590. Bibcode:2018ESSD...10.1551W. doi:10.5194/essd-10-1551-2018. ISSN 1866-3508.
- Weart, Spencer (2013). "Rise of interdisciplinary research on climate". Proceedings of the National Academy of Sciences. 110 (Supplement 1): 3657–3664. doi:10.1073/pnas.1107482109. PMC 3586608. PMID 22778431.
- Wild, M.; Gilgen, Hans; Roesch, Andreas; Ohmura, Atsumu; et al. (2005). "From Dimming to Brightening: Decadal Changes in Solar Radiation at Earth's Surface". Science. 308 (5723): 847–850. Bibcode:2005Sci...308..847W. doi:10.1126/science.1103215. PMID 15879214. S2CID 13124021.
- Williams, Richard G; Ceppi, Paulo; Katavouta, Anna (2020). "Controls of the transient climate response to emissions by physical feedbacks, heat uptake and carbon cycling". Environmental Research Letters. 15 (9): 0940c1. Bibcode:2020ERL....15i40c1W. doi:10.1088/1748-9326/ab97c9.
- Wolff, Eric W.; Shepherd, John G.; Shuckburgh, Emily; Watson, Andrew J. (2015). "Feedbacks on climate in the Earth system: introduction". Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences. 373 (2054): 20140428. Bibcode:2015RSPTA.37340428W. doi:10.1098/rsta.2014.0428. PMC 4608041. PMID 26438277.
- Zeng, Ning; Yoon, Jinho (2009). "Expansion of the world's deserts due to vegetation-albedo feedback under global warming". Geophysical Research Letters. 36 (17): L17401. Bibcode:2009GeoRL..3617401Z. doi:10.1029/2009GL039699. ISSN 1944-8007. S2CID 1708267.
- Zhang, Jinlun; Lindsay, Ron; Steele, Mike; Schweiger, Axel (2008). "What drove the dramatic arctic sea ice retreat during summer 2007?". Geophysical Research Letters. 35: 1–5. Bibcode:2008GeoRL..3511505Z. doi:10.1029/2008gl034005. S2CID 9387303.
- Zhao, C.; Liu, B.; et al. (2017). "Temperature increase reduces global yields of major crops in four independent estimates". Proceedings of the National Academy of Sciences. 114 (35): 9326–9331. doi:10.1073/pnas.1701762114. PMC 5584412. PMID 28811375.
Books, reports and legal documents
- Adams, B.; Luchsinger, G. (2009). Climate Justice for a Changing Planet: A Primer for Policy Makers and NGOs (PDF). UN Non-Governmental Liaison Service (NGLS). ISBN 978-92-1-101208-8.
- Archer, David; Pierrehumbert, Raymond (2013). The Warming Papers: The Scientific Foundation for the Climate Change Forecast. John Wiley & Sons. ISBN 978-1-118-68733-8.
- Climate Focus (December 2015). "The Paris Agreement: Summary. Climate Focus Client Brief on the Paris Agreement III" (PDF). Archived (PDF) from the original on 5 October 2018. Retrieved 12 April 2019.
- Clark, P. U.; Weaver, A. J.; Brook, E.; Cook, E. R.; et al. (December 2008). "Executive Summary". In: Abrupt Climate Change. A Report by the U.S. Climate Change Science Program and the Subcommittee on Global Change Research. Reston, VA: U.S. Geological Survey. Archived from the original on 4 May 2013.
- Climate Action Tracker (2019). Warming projections global update, December 2019 (PDF) (Report).
- DeFries, Ruth; Edenhofer, Ottmar; Halliday, Alex; Heal, Geoffrey; et al. (September 2019). The missing economic risks in assessments of climate change impacts (PDF) (Report). Grantham Research Institute on Climate Change and the Environment, London School of Economics and Political Science.
- Dessai, Suraje (2001). "The climate regime from The Hague to Marrakech: Saving or sinking the Kyoto Protocol?" (PDF). Tyndall Centre Working Paper 12. Tyndall Centre. Archived from the original (PDF) on 10 June 2012. Retrieved 5 May 2010.
- Druckman, A.; Jackson, T. (2016). "Understanding Households as Drivers of Carbon Emissions". In Clift, R.; Druckman, A. (eds.). Taking Stock of Industrial Ecology. Springer, Cham. pp. 181–203. doi:10.1007/978-3-319-20571-7_9. ISBN 978-3-319-20571-7.
- Dunlap, Riley E.; McCright, Aaron M. (2011). "Chapter 10: Organized climate change denial". In Dryzek, John S.; Norgaard, Richard B.; Schlosberg, David (eds.). The Oxford Handbook of Climate Change and Society. Oxford University Press. pp. 144–160. ISBN 9780199566600.
- Dunlap, Riley E.; McCright, Aaron M. (2015). "Chapter 10: Challenging Climate Change: The Denial Countermovement". In Dunlap, Riley E.; Brulle, Robert J. (eds.). Climate Change and Society: Sociological Perspectives. Oxford University Press. pp. 300–332. ISBN 9780199-356119.
- European Commission (28 November 2018). In-depth analysis accompanying the Commission Communication COM(2018) 773: A Clean Planet for all - A European strategic long-term vision for a prosperous, modern, competitive and climate neutral economy (PDF) (Report). Brussels. p. 188.
- Fleming, James Rodger (2007). The Callendar Effect: the life and work of Guy Stewart Callendar (1898–1964). Boston: American Meteorological Society. ISBN 978-1-878220-76-9.
- Academia Brasileira de Ciéncias (Brazil); Royal Society of Canada; Chinese Academy of Sciences; Académie des Sciences (France); Deutsche Akademie der Naturforscher Leopoldina (Germany); Indian National Science Academy; Accademia Nazionale dei Lincei (Italy); Science Council of Japan, Academia Mexicana de Ciencias; Russian Academy of Sciences; Academy of Science of South Africa; Royal Society (United Kingdom); National Academy of Sciences (United States of America) (May 2009). "G8+5 Academies' joint statement: Climate change and the transformation of energy technologies for a low carbon future" (PDF). The National Academies of Sciences, Engineering, and Medicine. Archived (PDF) from the original on 15 February 2010. Retrieved 5 May 2010.
- Global Methane Initiative (2020). Global Methane Emissions and Mitigation Opportunities (PDF) (Report). Global Methane Initiative.
- Global Subsidies Initiative (June 2019). Raising Ambition Through Fossil Fuel Subsidy Reform: Greenhouse gas emissions results modelling from 26 countries (PDF) (Report). Geneva: Global Subsidies Initiative of the International Institute for Sustainable Development.
- Haywood, Jim (2016). "Chapter 27 - Atmospheric Aerosols and Their Role in Climate Change". In Letcher, Trevor M. (ed.). Climate Change: Observed Impacts on Planet Earth. Elsevier. ISBN 9780444635242.
- Bridle, Richard; Sharma, Shruti; Mostafa, Mostafa; Geddes, Anna (June 2019). Fossil Fuel to Clean Energy Subsidy Swaps (PDF) (Report).
- Global Energy Transformation: A Roadmap to 2050 (2019 edition) (PDF) (Report). IRENA. 2019. Retrieved 15 May 2020.
- Krogstrup, Signe; Oman, William (4 September 2019). Macroeconomic and Financial Policies for Climate Change Mitigation: A Review of the Literature (PDF). IMF working papers. doi:10.5089/9781513511955.001. ISBN 9781513511955. ISSN 1018-5941. S2CID 203245445.
- Meinshausen, Malte (2019). "Implications of the Developed Scenarios for Climate Change". In Teske, Sven (ed.). Achieving the Paris Climate Agreement Goals. Achieving the Paris Climate Agreement Goals: Global and Regional 100% Renewable Energy Scenarios with Non-energy GHG Pathways for +1.5 °C and +2 °C. Springer International Publishing. pp. 459–469. doi:10.1007/978-3-030-05843-2_12. ISBN 978-3-030-05843-2.
- Millar, Neville; Doll, Julie; Robertson, G. (November 2014). Management of nitrogen fertilizer to reduce nitrous oxide (N2O) emissions from field crops (PDF) (Report). Michigan State University.
- Miller, J.; Du, L.; Kodjak, D. (2017). Impacts of World-Class Vehicle Efficiency and Emissions Regulations in Select G20 Countries (PDF) (Report). Washington, DC: The International Council on Clean Transportation.
- Müller, Benito (February 2010). Copenhagen 2009: Failure or final wake-up call for our leaders? EV 49 (PDF). Oxford Institute for Energy Studies. p. i. ISBN 978-1-907555-04-6. Archived (PDF) from the original on 10 July 2017. Retrieved 18 May 2010.
- National Research Council (2008). Understanding and responding to climate change: Highlights of National Academies Reports, 2008 edition, produced by the US National Research Council (US NRC) (Report). Washington, DC: National Academy of Sciences. Archived from the original on 4 March 2016. Retrieved 14 January 2016.
- National Research Council (2012). Climate Change: Evidence, Impacts, and Choices (PDF) (Report). Archived (PDF) from the original on 20 February 2013. Retrieved 9 September 2017.
- Newell, Peter (14 December 2006). Climate for Change: Non-State Actors and the Global Politics of the Greenhouse. Cambridge University Press. ISBN 978-0-521-02123-4. Retrieved 30 July 2018.
- NOAA. "January 2017 analysis from NOAA: Global and Regional Sea Level Rise Scenarios for the United States" (PDF). Archived (PDF) from the original on 18 December 2017. Retrieved 7 February 2019.
- NRC (2008). "Understanding and Responding to Climate Change" (PDF). Board on Atmospheric Sciences and Climate, US National Academy of Sciences. Archived (PDF) from the original on 11 October 2017. Retrieved 9 November 2010.
- O'Sullivan, Meghan; Overland, Indra; Sandalow, David (2017). The Geopolitics of Renewable Energy (PDF) (working paper). New York: Center on Global Energy Policy.
- Olivier, J. G. J.; Peters, J. A. H. W. (2019). Trends in global CO
2 and total greenhouse gas emissions (PDF). The Hague: PBL Netherlands Environmental Assessment Agency.
- Oreskes, Naomi (2007). "The scientific consensus on climate change: How do we know we're not wrong?". In DiMento, Joseph F. C.; Doughman, Pamela M. (eds.). Climate Change: What It Means for Us, Our Children, and Our Grandchildren. The MIT Press. ISBN 978-0-262-54193-0.
- Oreskes, Naomi; Conway, Erik (2010). Merchants of Doubt: How a Handful of Scientists Obscured the Truth on Issues from Tobacco Smoke to Global Warming (first ed.). Bloomsbury Press. ISBN 978-1-59691-610-4.
- REN21 (2019). Renewables 2019 Global Status Report (PDF). Paris: REN21 Secretariat. ISBN 978-3-9818911-7-1.
- REN21 (2020). Renewables 2020 Global Status Report (PDF). Paris: REN21 Secretariat. ISBN 978-3-948393-00-7.
- Royal Society (13 April 2005). Economic Affairs – Written Evidence. The Economics of Climate Change, the Second Report of the 2005–2006 session, produced by the UK Parliament House of Lords Economics Affairs Select Committee. UK Parliament. Archived from the original on 13 November 2011. Retrieved 9 July 2011.
- Stepherd, John (September 2009). Geoengineering the climate: Science, governance and uncertainty (PDF). London: The Royal Society. ISBN 978-0-85403-773-5.
- Setzer, Joana; Byrnes, Rebecca (July 2019). Global trends in climate change litigation: 2019 snapshot (PDF). London: the Grantham Research Institute on Climate Change and the Environment and the Centre for Climate Change Economics and Policy.
- Teske, Sven, ed. (2019). "Executive Summary" (PDF). Achieving the Paris Climate Agreement Goals: Global and Regional 100% Renewable Energy Scenarios with Non-energy GHG Pathways for +1.5 °C and +2 °C. Springer International Publishing. pp. xiii–xxxv. doi:10.1007/978-3-030-05843-2. ISBN 978-3-030-05843-2.
- Teske, Sven; Nagrath, Kriti; Morris, Tom; Dooley, Kate (2019). "Renewable Energy Resource Assessment". In Teske, Sven (ed.). Achieving the Paris Climate Agreement Goals. Achieving the Paris Climate Agreement Goals: Global and Regional 100% Renewable Energy Scenarios with Non-energy GHG Pathways for +1.5 °C and +2 °C. Springer International Publishing. pp. 161–173. doi:10.1007/978-3-030-05843-2_7. hdl:10453/139583. ISBN 978-3-030-05843-2.
- Teske, Sven (2019). "Trajectories for a Just Transition of the Fossil Fuel Industry". In Teske, Sven (ed.). Achieving the Paris Climate Agreement Goals. Achieving the Paris Climate Agreement Goals: Global and Regional 100% Renewable Energy Scenarios with Non-energy GHG Pathways for +1.5 °C and +2 °C. Springer International Publishing. pp. 403–411. doi:10.1007/978-3-030-05843-2_9. hdl:10453/139584. ISBN 978-3-030-05843-2.
- UN FAO (2016). Global Forest Resources Assessment 2015. How are the world's forests changing? (PDF) (Report). Food and Agriculture Organization of the United Nations. ISBN 978-92-5-109283-5. Retrieved 1 December 2019.
- United Nations Environment Programme (2019). Emissions Gap Report 2019 (PDF). Nairobi. ISBN 978-92-807-3766-0.
- UNFCCC (1992). United Nations Framework Convention on Climate Change (PDF).
- UNFCCC (1997). "Kyoto Protocol to the United Nations Framework Convention on Climate Change". United Nations.
- UNFCCC (30 March 2010). "Decision 2/CP.15: Copenhagen Accord". Report of the Conference of the Parties on its fifteenth session, held in Copenhagen from 7 to 19 December 2009. United Nations Framework Convention on Climate Change. FCCC/CP/2009/11/Add.1. Archived from the original on 30 April 2010. Retrieved 17 May 2010.
- UNFCCC (2015). "Paris Agreement" (PDF). United Nations Framework Convention on Climate Change.
- Park, Susin (May 2011). "Climate Change and the Risk of Statelessness: The Situation of Low-lying Island States" (PDF). United Nations High Commissioner for Refugees. Archived (PDF) from the original on 2 May 2013. Retrieved 13 April 2012.
- United States Environmental Protection Agency (2016). Methane and Black Carbon Impacts on the Arctic: Communicating the Science (Report). Archived from the original on 6 September 2017. Retrieved 27 February 2019.
- Van Oldenborgh, Geert-Jan; Philip, Sjoukje; Kew, Sarah; Vautard, Robert; et al. (2019). "Human contribution to the record-breaking June 2019 heat wave in France". Semantic Scholar. S2CID 199454488.
- State and Trends of Carbon Pricing 2019 (PDF) (Report). Washington, DC: World Bank. June 2019. doi:10.1596/978-1-4648-1435-8.
- World Health Organisation (2018). COP24 Special Report Health and Climate Change (PDF). Geneva. ISBN 978-92-4-151497-2.
- World Health Organization (2014). Quantitative risk assessment of the effects of climate change on selected causes of death, 2030s and 2050s (PDF) (Report). Geneva, Switzerland. ISBN 978-92-4-150769-1.
- World Meteorological Organization (2019). WMO Statement on the State of the Global Climate in 2018. WMO-No. 1233. Geneva. ISBN 978-92-63-11233-0.
- World Meteorological Organization (2020). WMO Statement on the State of the Global Climate in 2019. WMO-No. 1248. Geneva. ISBN 978-92-63-11248-4.
- Hallegatte, Stephane; Bangalore, Mook; Bonzanigo, Laura; Fay, Marianne; et al. (2016). Shock Waves : Managing the Impacts of Climate Change on Poverty. Climate Change and Development (PDF). Washington DC: World Bank. doi:10.1596/978-1-4648-0673-5. hdl:10986/22787. ISBN 978-1-4648-0674-2.
- World Resources Institute (December 2019). Creating a Sustainable Food Future: A Menu of Solutions to Feed Nearly 10 Billion People by 2050 (PDF). Washington, DC. ISBN 978-1-56973-953-2.
- American Institute of Physics
- Weart, Spencer (October 2008). The Discovery of Global Warming (2nd ed.). Cambridge, MA: Harvard University Press. ISBN 978-0-67403-189-0. Archived from the original on 18 November 2016. Retrieved 16 June 2020.
- Weart, Spencer (February 2019). The Discovery of Global Warming (online ed.). Archived from the original on 18 June 2020. Retrieved 19 June 2020.
- Weart, Spencer (January 2020). "The Carbon Dioxide Greenhouse Effect". The Discovery of Global Warming. American Institute of Physics. Archived from the original on 11 November 2016. Retrieved 19 June 2020.
- Weart, Spencer (January 2020). "The Public and Climate Change". The Discovery of Global Warming. American Institute of Physics. Archived from the original on 11 November 2016. Retrieved 19 June 2020.
- Weart, Spencer (January 2020). "The Public and Climate Change: Suspicions of a Human-Caused Greenhouse (1956–1969)". The Discovery of Global Warming. American Institute of Physics. Archived from the original on 11 November 2016. Retrieved 19 June 2020.
- Weart, Spencer (January 2020). "The Public and Climate Change (cont. – since 1980)". The Discovery of Global warming. American Institute of Physics. Archived from the original on 11 November 2016. Retrieved 19 June 2020.
- Weart, Spencer (January 2020). "The Public and Climate Change: The Summer of 1988". The Discovery of Global Warming. American Institute of Physics. Archived from the original on 11 November 2016. Retrieved 19 June 2020.
- Associated Press
- Colford, Paul (22 September 2015). "An addition to AP Stylebook entry on global warming". AP Style Blog. Retrieved 6 November 2019.
- Amos, Jonathan (10 May 2013). "Carbon dioxide passes symbolic mark". BBC. Archived from the original on 29 May 2013. Retrieved 27 May 2013.
- Rodgers, Lucy (17 December 2018). "Climate change: The massive CO
2 emitter you may not know about". BBC. Archived from the original on 17 December 2018.
- "UK Parliament declares climate change emergency". BBC. 1 May 2019. Retrieved 30 June 2019.
- Rigby, Sara (3 February 2020). "Climate change: should we change the terminology?". BBC Science Focus Magazine. Retrieved 24 March 2020.
- McGrath, Matt (4 November 2020). "Climate change: US formally withdraws from Paris agreement". BBC News. Retrieved 6 November 2020.
- Bulletin of the Atomic Scientists
- Carbon Brief
- Yeo, Sophie (4 January 2017). "Clean energy: The challenge of achieving a 'just transition' for workers". Carbon Brief. Retrieved 18 May 2020.
- McSweeney, Robert M.; Hausfather, Zeke (15 January 2018). "Q&A: How do climate models work?". Carbon Brief. Archived from the original on 5 March 2019. Retrieved 2 March 2019.
- Hausfather, Zeke (19 April 2018). "Explainer: How 'Shared Socioeconomic Pathways' explore future climate change". Carbon Brief. Retrieved 20 July 2019.
- Hausfather, Zeke (8 October 2018). "Analysis: Why the IPCC 1.5C report expanded the carbon budget". Carbon Brief. Retrieved 28 July 2020.
- McSweeney, Robert M. (31 January 2019). "Q&A: How is Arctic warming linked to the 'polar vortex' and other extreme weather?". Carbon Brief.
- Dunne, Daisy; Gabbatiss, Josh; Mcsweeny, Robert (7 January 2020). "Media reaction: Australia's bushfires and climate change". Carbon Brief. Retrieved 11 January 2020.
- Deutsche Welle
- Ruiz, Irene Banos (22 June 2019). "Climate Action: Can We Change the Climate From the Grassroots Up?". Ecowatch. Deutsche Welle. Archived from the original on 23 June 2019. Retrieved 23 June 2019.
- "Myths vs. Facts: Denial of Petitions for Reconsideration of the Endangerment and Cause or Contribute Findings for Greenhouse Gases under Section 202(a) of the Clean Air Act". U.S. Environmental Protection Agency. 25 August 2016. Retrieved 7 August 2017.
- US EPA (13 September 2019). "Global Greenhouse Gas Emissions Data". Archived from the original on 17 February 2020. Retrieved 8 August 2020.
- US EPA (15 September 2020). "Overview of Greenhouse Gases". Retrieved 15 September 2020.
- European Parliament
- Ciucci, M. (February 2020). "Renewable Energy". European Parliament. Retrieved 3 June 2020.
- Mirchandani, Bhakti (3 February 2020). "A €1 Trillion Opportunity: How To Read The EU Green Deal Investment Plan". Forbes. Retrieved 10 February 2020.
- Pugliese, Anita (20 April 2011). "Fewer Americans, Europeans View Global Warming as a Threat". Gallup. Archived from the original on 24 April 2011. Retrieved 22 April 2011.
- The Guardian
- Nuccitelli, Dana (26 January 2015). "Climate change could impact the poor much more than previously thought". The Guardian. Archived from the original on 28 December 2016.
- Carrington, Damian (19 March 2019). "School climate strikes: 1.4 million people took part, say campaigners". The Guardian. Archived from the original on 20 March 2019. Retrieved 12 April 2019.
- Carrington, Damian (17 May 2019). "Why the Guardian is changing the language it uses about the environment". The Guardian. Retrieved 20 May 2019.
- Milman, Oliver (15 September 2019). "'Americans are waking up': two-thirds say climate crisis must be addressed". The Guardian. Retrieved 16 September 2019.
- Rankin, Jennifer (28 November 2019). "'Our house is on fire': EU parliament declares climate emergency". The Guardian. ISSN 0261-3077. Retrieved 28 November 2019.Too risky
- Watts, Jonathan (19 February 2020). "Oil and gas firms 'have had far worse climate impact than thought'". The Guardian.
- Carrington, Damian (6 April 2020). "New renewable energy capacity hit record levels in 2019". The Guardian. Retrieved 25 May 2020.
- The Independent
- Weston, Phoebe (5 November 2019). "11,000 scientists declare global climate emergency and warn of 'untold human suffering'". The Independent. Retrieved 7 November 2019.
- Conway, Erik M. (5 December 2008). "What's in a Name? Global Warming vs. Climate Change". NASA. Archived from the original on 9 August 2010.
- Riebeek, H. (16 June 2011). "The Carbon Cycle: Feature Articles: Effects of Changing the Carbon Cycle". Earth Observatory, part of the EOS Project Science Office located at NASA Goddard Space Flight Center. Archived from the original on 6 February 2013. Retrieved 4 February 2013.
- "Arctic amplification". NASA. 2013. Archived from the original on 31 July 2018.
- Shaftel, Holly (January 2016). "What's in a name? Weather, global warming and climate change". NASA Climate Change: Vital Signs of the Planet. Archived from the original on 28 September 2018. Retrieved 12 October 2018.
- Carlowicz, Michael (12 September 2018). "Watery heatwave cooks the Gulf of Maine". NASA's Earth Observatory.
- Shaftel, Holly; Jackson, Randal; Callery, Susan; Bailey, Daniel, eds. (7 July 2020). "Overview: Weather, Global Warming and Climate Change". Climate Change: Vital Signs of the Planet. Retrieved 14 July 2020.
- National Conference of State Legislators
- "State Renewable Portfolio Standards and Goals". National Conference of State Legislators. 17 April 2020. Retrieved 3 June 2020.
- National Geographic
- Welch, Craig (13 August 2019). "Arctic permafrost is thawing fast. That affects us all". National Geographic. Retrieved 25 August 2019.
- National Science Digital Library
- Fleming, James R. (17 March 2008). "Climate Change and Anthropogenic Greenhouse Warming: A Selection of Key Articles, 1824–1995, with Interpretive Essays". National Science Digital Library Project Archive PALE:ClassicArticles. Retrieved 7 October 2019.
- Natural Resources Defense Council
- "What Is the Clean Power Plan?". Natural Resources Defense Council. 29 September 2017. Retrieved 3 August 2020.
- Schiermeier, Quirin (7 July 2015). "Climate scientists discuss future of their field". Nature. doi:10.1038/nature.2015.17917. Archived from the original on 11 October 2017.
- Crucifix, Michel (2016). "Earth's narrow escape from a big freeze". Nature. 529 (7585): 162–163. doi:10.1038/529162a. ISSN 1476-4687. PMID 26762453.
- The New York Times
- Rudd, Kevin (25 May 2015). "Paris Can't Be Another Copenhagen". The New York Times. Archived from the original on 3 February 2018. Retrieved 26 May 2015.
- Fandos, Nicholas (29 April 2017). "Climate March Draws Thousands of Protesters Alarmed by Trump's Environmental Agenda". The New York Times. ISSN 0362-4331. Archived from the original on 12 April 2019. Retrieved 12 April 2019.
- Albeck-Ripka, Livia (1 January 2020). "How to Reduce Your Carbon Footprint". New York Times. Retrieved 31 May 2020.
- NOAA (10 July 2011). "Polar Opposites: the Arctic and Antarctic". Archived from the original on 22 February 2019. Retrieved 20 February 2019.
- "What's the difference between global warming and climate change?". NOAA Climate.gov. 17 June 2015. Archived from the original on 7 November 2018. Retrieved 15 October 2018.
- Huddleston, Amara (17 July 2019). "Happy 200th birthday to Eunice Foote, hidden climate science pioneer". NOAA Climate.gov. Retrieved 8 October 2019.
- Lindsey, Rebecca (4 September 2018). "Did global warming stop in 1998?". NOAA. Archived from the original on 4 March 2019. Retrieved 20 February 2019.
- Our World in Data
- Pew Research Center
- Pew Research Center (24 June 2013). "Climate Change and Financial Instability Seen as Top Global Threats". Pew Research Center for the People & the Press. Archived from the original on 4 October 2013.
- Pew Research Center (5 November 2015). Global Concern about Climate Change, Broad Support for Limiting Emissions (Report). Archived from the original on 29 July 2017. Retrieved 7 August 2017.
- Pacific Environment
- Tyson, Dj (3 October 2018). "This is What Climate Change Looks Like in Alaska—Right Now". Pacific Environment. Retrieved 3 June 2020.
- Leopold, Evelyn (25 September 2019). "How leaders planned to avert climate catastrophe at the UN (while Trump hung out in the basement)". Salon. Retrieved 20 November 2019.
- Gleick, Peter (7 January 2017). "Statements on Climate Change from Major Scientific Academies, Societies, and Associations (January 2017 update)". ScienceBlogs. Retrieved 2 April 2020.
- Scientific American
- Wing, Scott L. (29 June 2016). "Studying the Climate of the Past Is Essential for Preparing for Today's Rapidly Changing Climate". Smithsonian. Retrieved 8 November 2019.
- The Sustainability Consortium
- "One-Fourth of Global Forest Loss Permanent: Deforestation Is Not Slowing Down". The Sustainability Consortium. 13 September 2018. Retrieved 1 December 2019.
- UN Environment
- "The Montreal Protocol: triumph by treaty". UN Environment. 20 November 2017. Archived from the original on 12 April 2019. Retrieved 12 April 2019.
- "Curbing environmentally unsafe, irregular and disorderly migration". UN Environment. 25 October 2018. Archived from the original on 18 April 2019. Retrieved 18 April 2019.
- "What are United Nations Climate Change Conferences?". UNFCCC. Archived from the original on 12 May 2019. Retrieved 12 May 2019.
- "What is the United Nations Framework Convention on Climate Change?". UNFCCC.
- Union of Concerned Scientists
- "Tropical Deforestation and Global Warming". Union of Concerned Scientists. 9 December 2012. Retrieved 6 August 2020.
- "Environmental Impacts of Renewable Energy Technologies". Union of Concerned Scientists. 5 March 2013. Retrieved 15 May 2020.
- "Carbon Pricing 101". Union of Concerned Scientists. 8 January 2017. Retrieved 15 May 2020.
- USA Today
- Rice, Doyle (21 November 2019). "'Climate emergency' is Oxford Dictionary's word of the year". USA Today. Retrieved 3 December 2019.
- Segalov, Michael (2 May 2019). "The UK Has Declared a Climate Emergency: What Now?". Vice. Retrieved 30 June 2019.
- The Verge
- Calma, Justine (27 December 2019). "2019 was the year of 'climate emergency' declarations". The Verge. Retrieved 28 March 2020.
- Roberts, D. (20 September 2019). "Getting to 100% renewables requires cheap energy storage. But how cheap?". Vox. Retrieved 28 May 2020.
- World Health Organization
- "WHO calls for urgent action to protect health from climate change – Sign the call". World Health Organization. November 2015. Retrieved 2 September 2020.
- World Resources Institute
- Levin, Kelly (8 August 2019). "How Effective Is Land At Removing Carbon Pollution? The IPCC Weighs In". World Resources institute. Retrieved 15 May 2020.
- Seymour, Frances; Gibbs, David (8 December 2019). "Forests in the IPCC Special Report on Land Use: 7 Things to Know". World Resources Institute.
- Yale Climate Connections
- Peach, Sara (2 November 2010). "Yale Researcher Anthony Leiserowitz on Studying, Communicating with American Public". Yale Climate Connections. Archived from the original on 7 February 2019. Retrieved 30 July 2018.
|Scholia has a profile for global warming (Q7942).|
- Climate Change at the National Academies – Repository for reports
- Met Office: Climate Guide – UK National Weather Service
- Educational Global Climate Modelling (EdGCM) – Research-quality climate change simulator
- Global Climate Change Indicators – NOAA
- Result of total melting of Polar regions on World – National Geographic