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Ocean atmosphere coupling over monsoon regions

Gadgil, Sulochana and Joseph, PV and Joshi, NV (1984) Ocean atmosphere coupling over monsoon regions. In: Nature, 312 (5990). pp. 141-143.

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Official URL: http://www.nature.com/nature/journal/v312/n5990/ab...

Abstract

In monsoon regions, the seasonal migration of the intertropical convergence zone (ITCZ) is manifested as a seasonal reversal of winds. Most of the summer monsoon rainfall over India occurs owing to synoptic and large-scale convection associated with the continental ITCZ (Fig. 1). We have investigated the interaction between these large-scale convective systems and the ocean over which they are generated1â3, concentrating on the relationship between organized convection over the Indian Ocean and sea surface temperature (SST). We report here that on a monthly basis the degree of cloudiness correlates well with SST for the relatively colder oceans, but when SST is maintained above 28 °C it ceases to be an important factor in determining the variability of cloudiness. Over the major regions of convection east of 70°E, which are warm year after year, the observed cloudiness cannot be correlated with variations in SST.

Item Type: Journal Article
Additional Information: Copyright for this article belongs to Macmillan magazines ltd.
Department/Centre: Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited: 28 Jan 2010 06:43
Last Modified: 28 Jan 2010 06:43
URI: http://eprints.iisc.ernet.in/id/eprint/20252

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