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Study the Mechanism of Surface Chlorophyll-a Variability in the Southern Tropical Indian Ocean Using an OGCM

Jayakumar, A and Gnanaseelan, C (2012) Study the Mechanism of Surface Chlorophyll-a Variability in the Southern Tropical Indian Ocean Using an OGCM. Marine Geodesy, 35 (3). pp. 246-256.

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Abstract

Eleven years (1997-2007) of SeaWiFS observations and Ocean General Circulation Model sensitivity experiments are used to understand chlorophyll-a variability in the southern tropical Indian Ocean. The strong offshore Ekman transport forced by anomalous southeasterly winds are responsible for inducing higher chlorophyll-a in the eastern equatorial Indian Ocean. In the case of the southwest tropical Indian Ocean, Rossby waves and local upwelling are responsible for lifting the phytoplankton from deep chlorophyll maxima to the surface. Both intraseasonal dynamical response and interannual forcing are responsible for the phytoplankton blooming in the western basin, whereas the interannual forcing is mainly responsible in the east.

Item Type: Article
Additional Information: Copyright of this article belongs to Taylor and Francis
Uncontrolled Keywords: annual variation; chlorophyll a; concentration (composition); Ekman transport; oceanic general circulation model; phytoplankton; Rossby wave; SeaWiFS; upwelling, Indian Ocean; Indian Ocean (Equatorial); Indian Ocean (Tropical)
Subjects: Meteorology and Climatology
Depositing User: IITM Library
Date Deposited: 28 Dec 2013 18:03
Last Modified: 28 Dec 2013 18:03
URI: http://moeseprints.incois.gov.in/id/eprint/475

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