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In meteorology, the Antarctic High is the stronger of the two polar highs, areas of high atmospheric pressure situated in the poles.[1] It is situated over Eastern Antarctica, hence it sometimes being referred to as the East Antarctic High.[2]
Effects
editSince the Last Glacial Period, temperature trends have suggested that the interplay from the Antarctic High and Southern Annular Mode has played a significant role in katabatic winds over the Patriot Hills Base Camp.[3] A 2022 study by Nature noted that when the high is over the Drake Passage, it alongside an elongated cyclone located in the South Pacific transport warm and moist air to the southwestern Antarctic Peninsula, which is linked to record-high temperatures, extreme summertime melt, and dramatic break-ups in the Larsen Ice Shelf and eastern Antarctic Peninsula since the 1990s.[4]
References
edit- ^ "Polar Vortex". National Geographic Society. Retrieved 10 October 2024.
- ^ Mayewski, P. A.; Meredith, M. P.; Summerhayes, C. P.; Turner, J.; Worby, A.; Barrett, P. J.; Casassa, G.; Bertler, N. A. N.; Bracegirdle, T.; Naveira Garabato, A. C.; Bromwich, D.; Campbell, H.; Hamilton, G. S.; Lyons, W. B.; Maasch, K. A.; Aoki, S.; Xiao, C.; van Ommen, Tas (March 2009). "State of the Antarctic and Southern Ocean climate system". Reviews of Geophysics. 47 (1). doi:10.1029/2007RG000231.
- ^ Turney, Chris; Fogwill, Chris; Van Ommen, Tas D.; Moy, Andrew D.; Etheridge, David; Rubino, Mauro; Curran, Mark A. J.; Rivera, AndréS (October 2013). "Late Pleistocene and early Holocene change in the Weddell Sea: a new climate record from the Patriot Hills, Ellsworth Mountains, West Antarctica". Journal of Quaternary Science. 28 (7): 697–704. doi:10.1002/jqs.2668. ISSN 0267-8179.
- ^ Clem, Kyle R.; Bozkurt, Deniz; Kennett, Daemon; King, John C.; Turner, John (13 July 2022). "Central tropical Pacific convection drives extreme high temperatures and surface melt on the Larsen C Ice Shelf, Antarctic Peninsula". Nature Communications. 13 (1): 3906. doi:10.1038/s41467-022-31119-4. ISSN 2041-1723.