01-05 December 2025
INCOIS, Hyderabad, India.
| Abstract Submission No. | ABS-05-0317 |
| Title of Abstract | Role of physical oceanographic parameters in impacting the cyclogenesis over Indian Ocean |
| Authors | Anuj Gupta*, Debasis Kundu*, Sreenivas Pentakota, Pushpalatha T., P. Gopi Krishna |
| Organisation | University of Hyderabad |
| Address | 1400 Master Colony, O/S Bada Goan Gate Jhansi, Uttar Pradesh, India Pincode: 284002 E-mail: thisisanujgupta@gmail.com |
| Country | India |
| Presentation | Oral |
| Abstract | Tropical cyclones form over tropical regions in both hemispheres (the Northern and Southern Indian Oceans). Till now, sea surface temperature (SST) is known as the only important parameter for cyclogenesis from an oceanic point of view. Oceanic Rossby and Kelvin waves are the factors that control the variability of different parameters. The Indian Ocean produces a lot of cyclogenesis each year, which have wide social and economic impacts on the Indian subcontinent. The objective of this work is to understand different physical oceanographic parameters and their impacts on tropical cyclones in the tropical Indian Ocean. In the northern Indian Ocean, downwelling kelvin waves (dKw) manipulate the thermal structure of the ocean by affecting the thermocline depth. Due to dKw propagation, the thermocline depth increases, warms up the sea surface, and increases the oceanic heat content. It impacts the sea surface salinity (SSS) as well, which eventually drives the density to change. Both warm SST and high oceanic heat content induce cyclogenesis, though SSS does not have too much importance in cyclogenesis. A positive sea level anomaly (SLA), which is mainly influenced by downwelling Rossby waves (dRw), influences cyclogenesis by deepening the thermocline depth from October to December. The Rossby wave pattern is not clearly visible in sea surface temperature, but during August and September, a coastal kelvin wave is propagating, which is influencing cyclogenesis, We found that in the southern Indian Ocean Westward, propagating dRw significantly controls different oceanic parameters and eventually controls the cyclogenesis over this region. Further, the impact of different oceanic parameters on cyclogenesis over Bay of Bengal is reported in this study. |
| Are you part of IIOE-2 endorsed project | no |
| Keywords | Tropical Cyclone, Kelvin waves, Rossby waves, Bay of Bengal, ocean and atmosphere data |
| For Awards | no |