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Indian Ocean response to anomalous conditions in 2006

Vinayachandran, PN and Kurian, Jaison and Neema, CP (2007) Indian Ocean response to anomalous conditions in 2006. In: Geophysical Research Letters, 34 (15).

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Official URL: http://www.agu.org/pubs/crossref/2007/2007GL030194...


The equatorial Indian Ocean (EIO) exhibited anomalous conditions characteristic of an Indian Ocean dipole (IOD) during 2006. The eastern EIO had cold sea surface temperature anomalies (SSTA), lower sea level, shallow thermocline and higher chlorophyll than normal. The anomalies in the east, restricted to the south of the equator, were highest off Sumatra. The western pole of the IOD was marked by warm SSTA and deeper thermocline with maxima on either side of the equator. An ocean general circulation model of the Indian Ocean forced by QuikSCAT winds reproduces the IOD of 2006 remarkably well. The switch over to cooling in the east and warming in the west happened during May and July respectively. In the east, air-sea heat flux initiated cold SSTA in the model which were sustained later by oceanic processes. In the west, surface heat fluxes and horizontal advection caused warm SSTA and contribution by the latter decreased after August.

Item Type: Journal Article
Publication: Geophysical Research Letters
Publisher: American Geophysical Union
Additional Information: Copyright of this article belongs to American Geophysical Union.
Department/Centre: Division of Mechanical Sciences > Centre for Atmospheric & Oceanic Sciences
Date Deposited: 22 Mar 2010 07:22
Last Modified: 22 Mar 2010 07:22
URI: http://eprints.iisc.ac.in/id/eprint/26338

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