Understanding the characteristics of rapid intensity changes of Tropical Cyclones over North Indian Ocean

Abstract North Indian Ocean (NIO), which comprises of Bay Bengal (BoB) and Arabian Sea (AS) basins, is one the highly potential regions for Tropical Cyclones (TCs) in world. Significant improvements have been achieved prediction movement TCs, since last decade. However, sudden intensity changes becomes a challenging task research operational meteorologists. Hence, present study focuses on finding climatological characteristics such over NIO regions. Rapid Intensification (RI) defined as 24-h maximum sustained surface wind speed rate equal to 30 knots (15.4 ms ?1 ). The results suggest that TCs formed basin are both seasonal sensitive. Since 2000, significant trend observed RI basin. At least among three cyclones getting intensified category. More number cases identified BoB than AS. post-monsoon season holds more rapid decay cases, with 63% 90% contribution. Most attaining onset their initial stage. Further, India receiving landfalling followed by Bangladesh Oman. east coast India, Tamil Nadu, Andhra Pradesh most vulnerable states these TCs. cyclogenesis locations associated hold higher moisture, sea temperature compared Non-RI cases.