In this article we examine the relationship between the warm pool properties and the ElNiño, LaNiña, ENSO years for the period from 1870–2015. It is also the largest consistent contributor to the global Ocean warming trends. In this study we observed that a warm Indian Ocean can in turn modulate the pacific conditions including the ElNino events. So, basically such large warming over the Indian Ocean has implication on the global climate. In this article we focused on the causes for this warming and found that it was mainly due to ElNino events. The ElNino events weaken during the summer westerly winds over the Indian Ocean, but in the summer the effect of LaNino events the surface temperature increases around 20 C .The sea surface temperature over Arabian Sea, Bay of Bengal and equatorial Indian Ocean is favorable for the formation of warm pool in the years 1999, 2010. The year 2010, shows the sea surface temperature greater than 300c over equatorial Indian Ocean and south eastern Arabian Sea .This is a good condition for getting good amount of rain fall over India.
