Summary of Abstract Submission

Abstract Submission No. IO50-05-0036PresentationPoster

RAINFALL PATTERNS OVER INDIA: THE COMBINED EFFECT OF EL NINO AND INDIAN OCEAN DIPOLE

Dr. K. P. R. Vittal Murty*1

1 Dept of Meteorology &Oceanography, Andhrauniversity,Andhrapradesh, India

ABSTRACT :

India is a monsoonal country. Good monsoon which assures timely and well distributed rainfall leads to boosts the economy of the country. On the contrary a failure in monsoon rainfall upsets the economy. The monsoon being a part of the global circulation is influenced by regional parameters and their interannual variations. In this article, the importance of climate change vis--vis vagaries in monsoon is studied and an attempt is made to get the physical basis for climatic change in the monsoon system. The importance of teleconnections in estimating the vagaries, in other words, the changes in monsoon systems is well documented. In this article the rainfall pattern in El Nino years are verified during 1990-2010. In this study we are proposing for the first time the combined effect of (Indian ocean dipole) IOD and El Nino on summer monsoon rainfall over India. It is found that when there is +ve IOD the rainfall is normal even though there is El Nino. However during -ve IOD, there is a drought condition. Thus the importance of teleconnections coupled with IOD on monsoon systems is discussed and illustrated in this article. It is concluded that the combined effect of IOD and El Nino are very important in studying the long term climatic trends of monsoon, which influence water resource in the Indian sub continent.