J4.6
The role of SST on the Asian summer monsoon circulation
P. L. S. Rao, IBM India Research Laboratory, New Delhi, India
In this paper, we examined the influence of sea surface temperature (SST) on the variability of Asian summer monsoon using a regional model. The NCEP reanalyses for June, July and August (JJA) of 1987 and 1988 are made use as initial conditions for the purpose. The monsoon circulation is maintained by persistent influx of heat and moisture as well as diabatic heating. We investigated the effect of interactive SST vs. prescribed SST of Indian Ocean on the monsoon circulation. It was demonstrated that the SST of Indian Ocean modulates the summer monsoon circulation. Also, the summer monsoon variability is more realistic with interactive SST. This is corroborated by simulations carried out with ECMWF analyses fields for JJA of 1987 and 1988.
Joint Session 4, Influence of air-sea interactions on monsoon development, variability and predictability (Joint Session with the 24th Conference on Hurricanes and Tropical Meteorology and the 10th Conference on Interaction of the Sea and Atmosphere)
Wednesday, 24 May 2000, 4:00 PM-6:00 PM
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