01-05 December 2025
INCOIS, Hyderabad, India.
| Abstract Submission No. | ABS-04-0153 |
| Title of Abstract | On the relative roles of mesoscale eddies and Kelvin wave propagation in governing the tracer balance over the Bay of Bengal. |
| Authors | Nihas A K*, Dr Sandeep K K |
| Organisation | IIT Bhubaneswar |
| Address | THEKKATHILVEEDU, KUREEPPALLY, KOLLAM, KERALA,691504 KOLLAM, Kerala, India Pincode: 691504 E-mail: nihasthekkathil786@gmail.com |
| Country | India |
| Presentation | Poster |
| Abstract | The Bay of Bengal is a semi-enclosed water body with complex climatic, hydrographic, and biogeochemical significance in the north-eastern Indian Ocean. The freshwater intake from neighbouring rivers and intense stratification, shallow mixed layer, and seasonal current reversals make this basin a critical region to monitor and analyse. The advancement of the South Asian monsoon, heat and salinity distributions and air-sea interactions make them unique. The Oceanic transports, such as volume, heat and salt, influence the upper ocean stratification, exchange of air-sea fluxes and intra-seasonal variability. This work employs a high-resolution ocean reanalysis product to quantify the spatiotemporal variability of these transports in the Bay of Bengal. The daily temperature, salinity, Sea Surface Height (SSH), zonal and meridional currents over the study region are obtained from global ocean physics reanalysis in Copernicus Marine Environment Monitoring Service (CMEMS), having 1/12° horizontal resolution. Using these datasets, the latitudinal variability of transport from the northern to southern Bay of Bengal over the years was estimated. Subsequently, the underlying factors for spatiotemporal variability in the transport were studied. The poleward propagation of equatorial coastal Kelvin waves along the boundaries of the Bay of Bengal imparts significant variations in sea level heights and current structures, especially the EICC and its reversals. These alter the transport structures in different aspects. The contribution of prevalent mesoscale eddies over the Western rim of the Bay of Bengal in modulating the transport structures is investigated based on the eddy kinetic energy distributions. The relative roles of eddies, Kelvin waves, the EICC, remote equatorial forcing and the local wind stress curl in governing the BOB's heat, salt, and volume transport varying with interannual climate modes were investigated. Identifying the key factors is essential in comprehending climate feedback in the region and the changes in biogeochemical cycles, especially under global climate-change scenarios. |
| Are you part of IIOE-2 endorsed project | no |
| Keywords | Ocean transports, Mesoscale eddies, Kelvin waves, EICC |
| For Awards | yes |
| Date Of Birth | 18-02-1999 |
| ECSN Registration Number | IIOE2-ECSN-0213 |