Modified Longhurst biogeographic provinces from Djavidnia et al. [1]
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.[2]
They are named after Alan R. Longhurst, the author of "Ecological Geography of the Sea", the textbook in which these codes are defined.[3]
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.[4]
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
East African 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
^Djavidnia, S.; Mélin, F.; Hoepffner, N. (2010). "Comparison of global ocean colour data records". Ocean Science. 6 (1): 61–76. Bibcode:2010OcSci...6...61D. doi:10.5194/os-6-61-2010.
^Reygondeau, Gabriel; Longhurst, Alan; Martinez, Elodie; Beaugrand, Gregory; Antoine, David; Maury, Olivier (2013). "Dynamic biogeochemical provinces in the global ocean" (PDF). Global Biogeochemical Cycles. 27 (4): 1046–1058. Bibcode:2013GBioC..27.1046R. doi:10.1002/gbc.20089. ISSN 0886-6236.
^Ecological Geography of the Sea (ISBN 0124555217), Academic Press, 2007
^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.
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