Study of Some Dynamical Perspectives of Tropical Cyclones

Tropical Cyclones are intense anticlockwise rotating low pressure weather systems that form over the Tropical Oceans. Intense, means near surface sustained wind speed exceeds 17ms-1 (60 Km h-1,32Kn). Severe tropical cyclones with near surface sustained wind speeds equal to or exceeding 33ms-1(120 km h-1,64 Kn) are called Hurricane over the Atlantic Ocean, East Pacific ocean and the Caribbean sea, Typhoon over the Western North Pacific Ocean. The life cycle of a Tropical Cyclone can be broadly classified into 4 stages: - 1) Genesis stage, 2) turbulence growing stage, 3) matured stage & 4) decay stage. The critical factors significant in storm formation: - i) Warm ocean water of at least 260 C. ii) At least 50 latitude from the equator. iii) Low vertical wind shear. iv) Moisture in the mid-latitude. v) Unstable conditions. vi) Preexisting disturbances. In the second stage of tropical cyclone life cycle, viz. in turbulence growing stage a small depression over oceans develops into a magnified storm by the catalytic influence of the above mentioned critical factors. In my research work I have made a humble attempt to explore the following issues regarding the tropical cyclone genesis, its subsequent development from depression, its stability analysis and track prediction: