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Numerical simulation of North Indian Ocean State prior to the onset of SW monsoon using SSM/I winds

Salvekar, PS and Ganer, DW and Deo, AA and Reddy, PR and Basu, S and Kumar, R (2002) Numerical simulation of North Indian Ocean State prior to the onset of SW monsoon using SSM/I winds. Marine Geodesy, 25 (1-2). pp. 115-131.

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The Sea Surface Temperatures (SST) and currents are simulated over the north Indian Ocean, during the onset phase of southwest monsoon for the three years 1994, 1995, and 1996, using daily Special Sensor Microwave/Imager (SSM/I) winds and National Center for Environmental Prediction (NCEP) heat fluxes as forcings in the 21/2 layer thermodynamic numerical ocean model. The results are discussed for the 30-day period from 16 May to 13 June for all the three years, to determine the ocean state during the onset phase of SW monsoon. The maximum variability in the simulated SST is found along the Somali coast, Indian coasts, and equatorial regions. The maximum SST in the North Arabian Sea is found to be greater than 30°C and minimum SST in the west equatorial region is 25°C during the onset phase of all three years. Model SSTs are in agreement with Reynolds SST. SST gradients in the north-south as well as in the east-west directions, west of 80°E are found to change significantly prior to the onset. It can be inferred from the study that the SST gradient of 2.5°C/2000 km is seen due north and due west of the region 2°-7°S, 60°-65°E, about 8 to 10 days prior to the arrival of SW monsoon near Kerala coast. Upper and lower layer circulation fields do not show prominent interannual variability.

Item Type: Article
Additional Information: Copyright of this article belongs to Taylor & Francis
Uncontrolled Keywords: monsoon; numerical model; oceanic circulation; sea surface temperature; SSM-I, India
Subjects: Meteorology and Climatology
Depositing User: IITM Library
Date Deposited: 24 Apr 2015 14:33
Last Modified: 24 Apr 2015 14:33

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