Tropical cyclone research over the north Indian ocean: Impact of data and vortex initialization in high resolution mesoscale models

Abstract

The nomenclature of TCs is different in different parts of the world. In the Atlantic and eastern Pacific, they are known as ‘hurricane’ and in western Pacific as ‘typhoon’. In the North Indian Ocean (NIO) region, they are termed as ‘tropical cyclone’. Though, considered as a relatively rare phenomenon in any basin, annual frequency of occurrence is quite steady with an average variation of ±7%. Approximately, 80 tropical storm reach cyclonic storm intensity every year that cause an average number of 20,000 deaths and a total economic loss of $6-7 billion (Southern, 1979). Almost all these storms form within 25° latitude on both sides of the equator except in the equatorial region of 5° S to 5° N due to negligible Coriolis force.