Seasonal and interannual variability of calcite in the vicinity of the Patagonian shelf break (38°S-52°S)

Details Seasonal and interannual variability of calcite in the vicinity of the Patagonian shelf break (38°S-52°S) Seasonal and interannual variability of calcite in the vicinity of the Patagonian shelf break (38°S-52°S)

Aug 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006georl..3316610s&link_type=abstract

Geophysical Research Letters, Volume 33, Issue 16, CiteID L16610

Mathematics

Logic

6

Oceanography: Biological And Chemical: Ecological Prediction, Oceanography: Biological And Chemical: Food Webs, Structure, And Dynamics (0491), Oceanography: Biological And Chemical: Ecosystems, Structure, Dynamics, And Modeling (0439), Oceanography: Biological And Chemical: Nutrients And Nutrient Cycling (0470, 1050), Oceanography: Biological And Chemical: Phytoplankton

Scientific paper

The timing and duration of coccolithophore blooms along the Patagonian shelf break, as well as insights on the mechanisms that drive and maintain these blooms, were analyzed using time series of chlorophyll chl a, calcite, and sea-surface temperature (SST) derived from remote sensing data (SeaWiFS and AVHRR) and historic hydrographic data. The seasonal variability and succession of phytoplankton groups respond to light intensity and nutrient supply within the mixed layer due to seasonal changes in stratification. The early spring bloom is diatom-dominated and starts in September under nutrient-rich Malvinas waters when the mixed layer begins to shallow (<80 m), and peaks around November with mixed layer depths (MLD) less than 40 m. After nutrient depletion from the spring bloom, a coccolithophore bloom begins in November when the MLD is less than 40 m, and peaks in January when the MLD reaches its minimum (18 m) and PAR reaches its maximum intensity.

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