Climatology of recurvature of tropical cyclone over Bay of Bengal and Arabian Sea

One of the reasons of cyclone havoc is its path change and forming recurvature during its movement because recurvature of tropical cyclone is one of the fundamental problems in forecasting its movement and in pre-preparedness. In the present study the track of the tropical cyclone has been taken from website of NOAA (1931-1970) and India Meteorological Department (IMD) website (1981-2010). Based on above mentioned data the tropical cyclone recurvature is obtained for the 1931-2010 and also for the different decades. The cases were analyzed here for frequency of tropical cyclone recurvature of less than and more than 90 degree in pre monsoon and post monsoon season of the period of 1931-2010 over Bay of Bengal and Arabian Sea. The study reveals that the recurvature of tropical cyclone over Indian seas is greater during post-monsoon season as compared to pre-monsoon season (for both cases: more/less than 90 degree). In all cases, decade 1971-80 show highest recurvature frequency of tropical cyclones over Indian seas. The total number of cyclone associated with recurvature of less than 90 degree is more than that of recurvature of greater than 90 degree. The number of cyclone having recurvature less/greater than 90 degrees is more in Bay of Bengal than Arabian Sea.