Abstract ID- MA19-Th3-P002 North Indian Ocean Cyclones of 2019 and Associated Upper Ocean Thermal Structure A. A. Deo and D. W. Ganer Indian Institute of Tropical Meteorology, Pune, India
[email protected] Introduction Methodology and Study Area Discussion and Conclusion Tropical cyclone (TC) interact not only with the Several studies have shown that the cooling in surface but also with the deeper oceans, the sea surface is 2–3ºC in Indian Ocean during the depth depending upon the strength of the wind passage of tropical cyclone depending upon its mixing.TC induced ocean vertical mixing can intensity. Few studies are there depicting the alter the upper-ocean temperature structure, change in the subsurface of the ocean.The heat Fani(ESCS) Vayu(VSCS) Maha(ESCS) Bulbul(VSCS) influencing ocean heat content. The upper ocean 115 80 100 75 (kts) content of ocean plays important role in response is typically characterized by sea Figure -2 intensification (Sharma et al 2014) and movement surface cooling and subsurface warming which is OMT is average temperature of an ocean layer. of the TC induced by a combination of physical processes OMT data of different layers, surface to 50, Figure-5 including enthalpy flux exchange, Ekman pumping, 100, 150, 200, 300, 500, 700 meters and that up Change in OMT during Vayu and Bulbul geostrophic advection and ocean vertical mixing. to 26ºC isotherm depth, have been derived using In exploring the ocean’s role in cyclone’s sea surface height anomaly, estimated from intensification, it is necessary to consider not altimeter observations, and SST obtained from only SST, but the thermal structure of the radiometers.