By C.V.Singh Centre For Energy Studies Indian Institute Of Technology Hauz Khas, New Delhi-110016, INDIA E-mail : cvsingh@cas.iitd.ernet.in Abstract
The present study analysis the dominant rainfall patterns from standard rainfall records over India, along with the major modes of outgoing long-wave radiation that occurred in flood and drought years over India during the period 1978-2002. The data has been divided in two categories flood and drought years. It has been observed that flood year occurs during 1983,1988 and 1994 ,where a drought year occurs in 1982,1987 and 2002. The characteristics of monsoon rainfall and outgoing long-wave radiation at 68 stations in India is highlighted. The purpose of such an analysis is to ascertain the nature of the rainfall distribution.
The variations of outgoing long-wave radiation for the summer monsoon period show a close association with the large scale monsoon rainfall over India. The satellite observed outgoing long-wave radiation can be used to monitor the large scale monsoon circulation and its interannual variability. The correlation coefficient between OLR and monsoon rainfall was found to be = -0.69, which is significant at the 5% level, thus indicating some association between them. It has also been found that the rainfall fluctuations between drought and flood years of the monsoon season over the Indian region are strongly associated with the outgoing long wave radiation.
Key Words:(Monsoon Variability,Outgoing long-wave radiation,Flood years,Drought Years, Satellite)
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