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Longhurst code

Longhurst code refers to a set of geospatial four-letter geocodes for referencing geographic regions in oceanography.

The set of 56 geocodes represent biogeochemical provinces that partition the pelagic environment. It is assumed that each province represents a unique set of environmental conditions.[1]

They are named after Alan R. Longhurst, the author of "Ecological Geography of the Sea", the textbook in which these codes are defined.[2]

These codes have also been used in bioinformatic databases such as IMG to represent sample origins for sequenced microbial genomes, as a supplement to latitude and longitude coordinate metrics.[3]

longhurst_code province_name ocean biome
FKLD Southwest Atlantic shelves Atlantic Coastal
BRAZ Brazilian current coast Atlantic Coastal
BENG Benguela current coast Atlantic Coastal
GUIN Guinea current coast Atlantic Coastal
CNRY Canary current coast Atlantic Coastal
GUIA Guianas coast Atlantic Coastal
NECS Northeast Atlantic shelves Atlantic Coastal
NWCS Northwest Atlantic shelves Atlantic Coastal
ARCT Atlantic Arctic Atlantic Polar
SARC Atlantic sub-Arctic Atlantic Polar
SATL South Atlantic gyral Atlantic Trade wind
ETRA Eastern tropical Atlantic Atlantic Trade wind
WTRA Western tropical Atlantic Atlantic Trade wind
CARB Caribbean Atlantic Trade wind
NATR North Atlantic tropical gyral Atlantic Trade wind
NAST E Northeast Atlantic subtropical gyral Atlantic Westerly
MEDI Mediterranean Sea Atlantic Westerly
NAST W Northwest Atlantic subtropical gyral Atlantic Westerly
GFST Gulf Stream Atlantic Westerly
NADR North Atlantic Drift Atlantic Westerly
HUMB Humboldt current coast Pacific Coastal
AUSE East Australian coast Pacific Coastal
SUND Sunda-Arafura shelves Pacific Coastal
CHIN China Sea Pacific Coastal
CAMR Central American coast Pacific Coastal
ALSK Alaska coastal downwelling Pacific Coastal
NEWZ New Zealand coast Pacific Coastal
CCAL Coastal Californian current Pacific Coastal
BERS North Pacific epicontinental sea Pacific Polar
ARCH Archipelagic deep basins Pacific Trade wind
PEQD Pacific equatorial divergence Pacific Trade wind
PNEC North Pacific equatorial counter current Pacific Trade wind
NPTG North Pacific Tropical gyre Pacific Trade wind
C(O)CAL California current Pacific Trade wind
SPSG South Pacific gyre Pacific Trade wind
WARM Western Pacific warm pool Pacific Trade wind
TASM Tasman Sea Pacific Westerly
KURO Kuroshio current Pacific Westerly
PSAE Eastern Pacific subarctic gyres Pacific Westerly
PSAW Western Pacific subarctic gyres Pacific Westerly
NPPF North Pacific polar front Pacific Westerly
NPSW Northwest Pacific subtropical Pacific Westerly
NPSE Northeast Pacific subtropical Pacific Westerly
EAFR Eastern India coast Indian Coastal
AUSW Western Australian and Indonesian coast Indian Coastal
IND E Eastern India coast Indian Coastal
REDS Red Sea, Persian Gulf Indian Coastal
IND W Western India coast Indian Coastal
ISSG Indian South subtropical gyre Indian Trade wind
MONS Indian monsoon gyre Indian Trade wind
ARAB Northwest Arabian Sea upwelling Indian Westerly
SSTC South subtropical convergence Antarctic Westerly
SANT Subantarctic water ring Antarctic Westerly
ANTA Antarctic Antarctic Polar
APLR Austral polar Antarctic Polar
BPRL Boreal polar Arctic Polar


  1. ^ Reygondeau, Gabriel; Longhurst, Alan; Martinez, Elodie; Beaugrand, Gregory; Antoine, David; Maury, Olivier (2013). "Dynamic biogeochemical provinces in the global ocean". Global Biogeochemical Cycles. 27 (4): 1046–1058. doi:10.1002/gbc.20089. ISSN 0886-6236.
  2. ^ Ecological Geography of the Sea (ISBN 0124555217), Academic Press, 2007
  3. ^ Markowitz, V. M.; Chen, I.-M. A.; Palaniappan, K.; Chu, K.; Szeto, E.; Grechkin, Y.; Ratner, A.; Jacob, B.; Huang, J.; Williams, P.; Huntemann, M.; Anderson, I.; Mavromatis, K.; Ivanova, N. N.; Kyrpides, N. C. (2011). "IMG: the integrated microbial genomes database and comparative analysis system". Nucleic Acids Research. 40 (D1): D115–D122. doi:10.1093/nar/gkr1044. ISSN 0305-1048. PMC 3245086. PMID 22194640.