Articles | Volume 17, issue 1
https://doi.org/10.5194/os-17-393-2021
https://doi.org/10.5194/os-17-393-2021
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

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Cited articles

Ashok, K., Guan, Z., and Yamagata, T.: A Look at the Relationship between the ENSO and the Indian Ocean Dipole, J. Meteorol. Soc. Jpn. Ser. II, 81, 41–56, https://doi.org/10.2151/jmsj.81.41, 2003. a
Backhaus, J. O.: A Three-dimensional Model for the Simulation of Shelf Sea Dynamics, Deutsche Hydrografische Z., 38, 165–187, 1985. a, b
Becker, J. J., Sandwell, D. T., Smith, W. H. F., Braud, J., Binder, B., Depner, J., Fabre, D., Factor, J., Ingalls, S., Kim, S.-H., Ladner, R., Marks, K., Nelson, S., Pharaoh, A., Trimmer, R., Rosenberg, J. V., Wallace, G., and Weatherall, P.: Global Bathymetry and Elevation Data at 30 Arc Seconds Resolution: SRTM30_PLUS, Mar. Geodesy, 32, 355–371, https://doi.org/10.1080/01490410903297766, 2009. a
Becker, J. J., Sandwell, D. T., Smith, W. H. F., Braud, J., Binder, B., Depner, J., Fabre, D., Factor, J., Ingalls, S., Kim, S.-H., Ladner, R., Marks, K., Nelson, S., Pharaoh, A., Trimmer, R., Von Rosenberg, J., Wallace, G., and Weatherall, P.: Global Bathymetry and Elevation Data at 30 Arc Seconds Resolution: SRTM30_PLUS, available at: ftp://topex.ucsd.edu/pub/srtm30_plus, last access: 26 February 2021. 
Chatterjee, A., Shankar, D., McCreary, J. P., Vinayachandran, P. N., and Mukherjee, A.: Dynamics of Andaman Sea Circulation and Its Role in Connecting the Equatorial Indian Ocean to the Bay of Bengal, J. Geophys. Res.-Oceans, 122, 3200–3218, https://doi.org/10.1002/2016JC012300, 2017. a, b
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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.