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.
They are named after Alan R. Longhurst, the author of "Ecological Geography of the Sea", the textbook in which these codes are defined.Ecological Geography of the Sea (), Academic Press, 2007
These codes have also been used in bioinformatic databases such as to represent sample origins for sequenced microbial genomes, as a supplement to latitude and longitude coordinate metrics.
longhurst_code province_name ocean biomeFKLD Southwest Atlantic shelves Atlantic CoastalBRAZ Brazilian current coast Atlantic CoastalBENG Benguela current coast Atlantic CoastalGUIN Guinea current coast Atlantic CoastalCNRY Canary current coast Atlantic CoastalGUIA Guianas coast Atlantic CoastalNECS Northeast Atlantic shelves Atlantic CoastalNWCS Northwest Atlantic shelves Atlantic CoastalARCT Atlantic Arctic Atlantic PolarSARC Atlantic sub-Arctic Atlantic PolarSATL South Atlantic gyral Atlantic Trade windETRA Eastern tropical Atlantic Atlantic Trade windWTRA Western tropical Atlantic Atlantic Trade windCARB Caribbean Atlantic Trade windNATR North Atlantic tropical gyral Atlantic Trade windNAST E Northeast Atlantic subtropical gyral Atlantic WesterlyMEDI Mediterranean Sea Atlantic WesterlyNAST W Northwest Atlantic subtropical gyral Atlantic WesterlyGFST Gulf Stream Atlantic WesterlyNADR North Atlantic Drift Atlantic WesterlyHUMB Humboldt current coast Pacific CoastalAUSE East Australian coast Pacific CoastalSUND Sunda-Arafura shelves Pacific CoastalCHIN China Sea Pacific CoastalCAMR Central American coast Pacific CoastalALSK Alaska coastal downwelling Pacific CoastalNEWZ New Zealand coast Pacific CoastalCCAL Coastal Californian current Pacific CoastalBERS North Pacific epicontinental sea Pacific PolarARCH Archipelagic deep basins Pacific Trade windPEQD Pacific equatorial divergence Pacific Trade windPNEC North Pacific equatorial counter current Pacific Trade windNPTG North Pacific Tropical gyre Pacific Trade windC(O)CAL California current Pacific Trade windSPSG South Pacific gyre Pacific Trade windWARM Western Pacific warm pool Pacific Trade windTASM Tasman Sea Pacific WesterlyKURO Kuroshio current Pacific WesterlyPSAE Eastern Pacific subarctic gyres Pacific WesterlyPSAW Western Pacific subarctic gyres Pacific WesterlyNPPF North Pacific polar front Pacific WesterlyNPSW Northwest Pacific subtropical Pacific WesterlyNPSE Northeast Pacific subtropical Pacific WesterlyEAFR East African coast Indian CoastalAUSW Western Australian and Indonesian coast Indian CoastalIND E Eastern India coast Indian CoastalREDS Red Sea, Persian Gulf Indian CoastalIND W Western India coast Indian CoastalISSG Indian South subtropical gyre Indian Trade windMONS Indian monsoon gyre Indian Trade windARAB Northwest Arabian Sea upwelling Indian WesterlySSTC South subtropical convergence Antarctic WesterlySANT Subantarctic water ring Antarctic WesterlyANTA Antarctic Antarctic PolarAPLR Austral polar Antarctic PolarBPLR Boreal polar Arctic Polar
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