Ocean Science
Ocean Science
OS
Articles | Volume 17, issue 1
Articles | Volume 17, issue 1
https://doi.org/10.5194/os-17-393-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/os-17-393-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 17, issue 1
Research article
 | 
03 Mar 2021
Research article |  | 03 Mar 2021

Correlation between subsurface salinity anomalies in the Bay of Bengal and the Indian Ocean Dipole and governing mechanisms

Zheen Zhang, Thomas Pohlmann, and Xueen Chen

Data sets

HAMSOM Historical Experiment of the Bay of Bengal Zheen Zhang https://cera-www.dkrz.de/WDCC/ui/cerasearch/entry?acronym=DKRZ_LTA_119_ds00001

EN4: quality controlled subsurface ocean temperature and salinity profiles and objective Simon A. Good, Matthew J. Martin, and Nick A. Rayner https://www.metoffice.gov.uk/hadobs/en4/

The German contribution of the Estimating the Circulation and Climate of the Ocean project Armin Köhl https://icdc.cen.uni-hamburg.de/

MPI-ESM-MR historical run Max Planck Institute for Meteorology https://esgf-node.llnl.gov/projects/cmip5/

Roemmich-Gilson Argo Climatology Dean Roemmich and John Gilson http://sio-argo.ucsd.edu/RG_Climatology.html

ERA5 ECMWF https://www.ecmwf.int/en/forecasts/datasets/reanalysis-datasets/era5

World Ocean Atlas 2018 NOAA https://www.nodc.noaa.gov/OC5/woa18/

WaterGAP Petra Döll, Frank Kaspar, and Bernhard Lehner http://www.watergap.de/

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Short summary
In this study, we found that the interannual subsurface temperature and salinity variability of the Bay of Bengal (BoB) shows a remarkable delayed correlation with the Indian Ocean Dipole mode. We employed a regional model and determined the contributions of the coastal Kelvin waves and the westward-moving Rossby waves to this correlation. An analysis of the salinity budget revealed that the advection terms dominate the subsurface salinity changes in the BoB.
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