High-resolution numerical modelling of seasonal volume, freshwater, and heat transport along the Indian coast

Madkaiker, Kunal; Rao, Ambarukhana D.; Joseph, Sudheer

doi:https://doi.org/10.5194/os-20-1167-2024

Articles | Volume 20, issue 5

https://doi.org/10.5194/os-20-1167-2024

© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.

Special issue:

Oceanography at coastal scales: modelling, coupling, observations,...

https://doi.org/10.5194/os-20-1167-2024

© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 20, issue 5

Research article

|

24 Sep 2024

Research article |

| 24 Sep 2024

High-resolution numerical modelling of seasonal volume, freshwater, and heat transport along the Indian coast

Kunal Madkaiker, Ambarukhana D. Rao, and Sudheer Joseph

Supplement

https://doi.org/10.5194/os-20-1167-2024-supplement

Data sets

The gebco_2020 grid - A continuous terrain model of the global oceans and land P. Weatherall et al. https://doi.org/10.5285/a29c5465-b138-234d-e053-6c86abc040b9

ERA5 hourly data on single levels from 1940 to present H. Hersbach et al. https://doi.org/10.24381/cds.adbb2d47

ERA5 hourly data on pressure levels from 1940 to present H. Hersbach et al. https://doi.org/10.24381/cds.bd0915c6

OSTIA L4 SST Analysis (GDS2) UK Met Office https://doi.org/10.5067/GHOST-4FK02

SMOS SSS L3 maps generated by CATDS CEC LOCEAN J. Boutin et al. https://doi.org/10.17882/52804

CORA, Coriolis Ocean Dataset for Reanalysis Tanguy Szekely et al. https://doi.org/10.17882/46219

Global Total (COPERNICUS-GLOBCURRENT), Ekman and Geostrophic currents at the Surface and 15m Copernicus Marine Service https://doi.org/10.48670/mds-00327

Model code and software

MITgcm/MITgcm: checkpoint68z (Version checkpoint68z) Jean-Michel Campin et al. https://doi.org/10.5281/zenodo.13104130

Short summary

Using a high-resolution model, we estimated the volume, freshwater, and heat transports along Indian coasts. Affected by coastal currents, transport along the eastern coast is highly seasonal, and the western coast is impacted by intraseasonal oscillations. Coastal currents and equatorial forcing determine the relation between NHT and net heat flux in dissipating heat in coastal waters. The north Indian Ocean functions as a heat source or sink based on seasonal flow of meridional heat transport.