Biological response of the sea around Sri Lanka to summer monsoon

Details Biological response of the sea around Sri Lanka to summer monsoon Biological response of the sea around Sri Lanka to summer monsoon

Jan 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004georl..3101302v&link_type=abstract

Geophysical Research Letters, Volume 31, Issue 1, CiteID L01302

Mathematics

Logic

2

Oceanography: Physical: Upper Ocean Processes, Oceanography: General: Descriptive And Regional Oceanography, Oceanography: Biological And Chemical: Plankton, Oceanography: General: Upwelling And Convergences

Scientific paper

Chlorophyll-a concentration (chl a) maps derived from the Ocean Color Monitor (OCM) on board Indian Remote Sensing Satellite (IRS-P4) and Seaviewing Wide field of View sensor (SeaWiFS) show increased chl a in the waters around Sri Lanka during summer monsoon. Physical processes that can lead to the phytoplankton bloom are investigated using upper ocean temperature profiles and satellite derived winds, sea surface temperature (SST) and sea level anomalies (SLA). There is a chl a bloom attached to the southern coast of Sri Lanka accompanied by cool SST, low SLA and upsloping of isotherms towards the coast. Coastal upwelling driven by monsoon winds is identified as the physical mechanism causing nutrient enrichment in the surface layer. The Southwest Monsoon Current (SMC) which flows eastward south of Sri Lanka and then into the Bay of Bengal advects the upwelled water eastward along its path. The chl a rich waters from the Indian coast also advects along with the SMC towards Sri Lanka. East of Sri Lanka the open ocean upwelling associated with the Sri Lanka Dome is also found to be an important process that upwell nutrients.

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