Extending the SeaWiFS chlorophyll data set back 50 years in the northeast Atlantic

Details Extending the SeaWiFS chlorophyll data set back 50 years in the northeast Atlantic Extending the SeaWiFS chlorophyll data set back 50 years in the northeast Atlantic

Mar 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005georl..3206603r&link_type=abstract

Geophysical Research Letters, Volume 32, Issue 6, CiteID L06603

Mathematics

Logic

7

Oceanography: General: Remote Sensing And Electromagnetic Processes (0689, 2487, 3285, 4455, 6934), Oceanography: General: Climate And Interannual Variability (1616, 1635, 3305, 3309, 4513), Oceanography: Biological And Chemical: Phytoplankton, Oceanography: Biological And Chemical: Ecosystems, Structure, Dynamics, And Modeling (0439)

Scientific paper

Phytoplankton play a key role in biogeochemical cycling and climate processes. Precise quantitative measurements of chlorophyll-a (Chl-a), a measure of phytoplankton biomass, have only been available globally since 1997 from the Sea-viewing Wide Field-of-view Sensor (SeaWiFS). In the North Atlantic, semi-quantitative measurements of chlorophyll (Phytoplankton Color Index, PCI) for >50 years have been collected by the Continuous Plankton Recorder. Here we demonstrate a significant correlation between PCI and SeaWiFS Chl-a from 1997-2002. Combining both time series allows quantification of the stepwise increase in biomass in the mid-1980s this regime shift corresponded to a 60% increase in Chl-a. This was a result of an 80% increase in Chl-a during winter, alongside a smaller summer increase. This new high-resolution data set on the monthly variation of Chl-a in the North Atlantic since 1948 is now available for the development and validation of climate models, and for interpretation of ecological changes related to climate.

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