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Spatio-temporal variations of convection and rainfall over Indian Ocean warm pool

Panchawagh, NV and Seetaramayya, P (2002) Spatio-temporal variations of convection and rainfall over Indian Ocean warm pool. Indian Journal of Radio and Space Physics, 31 (1). pp. 34-48.

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An attempt has been made to examine the spatio-temporal variability of rainfall and cloud cover in relation to the sea surface temperature distribution over the Indian Ocean warm pool (IOWP : 10°N-15°S; 60°-100°E) based on the NOAA Polar Orbiting Satellite outgoing longwave radiation (OLR) and WMO/WCRP Global Precipitation Climatological Project (GPCP) precipitation data at 2.5°2.5° latitude/longitude grid for the period 1979-1990 and 1986-1993, respectively. The above data were subjected to empirical orthogonal functions (EOFs) analysis and it was found that the first four modes (EOF 1-4) show strong variability in both the above parameters in the region. In general, the isopleths patterns of the EOF-1 for both the elements show more or less similar trend of fair flatness of positive maximum loading in relation to warm pool area and, generally, oriented in an east-west direction depending upon the orientation of the warm sea surface temperature isotherms. The other three modes (EOF 2-4) showed distribution slightly different from first mode (EOF-1). The isopleths of these later three modes showed an inclination from the isopleths of EOF-1 in the region, which implies that the processes which are operating during these modes differ from those of EOF-1.

Item Type: Article
Additional Information: Copyright of this article belongs to NISCAIR
Subjects: Meteorology and Climatology
Depositing User: IITM Library
Date Deposited: 25 Apr 2015 09:03
Last Modified: 25 Apr 2015 09:03

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