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Hareesh Kumar P.V.,Naval Physical and Oceanography Laboratory | Mathew B.,Naval Physical and Oceanography Laboratory | Ramesh Kumar M.R.,National Institute of Oceanography of India | Raghunadha Rao A.,Naval Physical and Oceanography Laboratory | And 3 more authors.
Ocean Dynamics | Year: 2013

Physical oceanography measurements reveal a strong salinity (0.18 psu km-1) and temperature (0.07 C km-1) front off the east coast of India in December 1997. T-S diagrams suggest lateral mixing between the fresh water at the coast and the ambient warmer, saltier water. This front seems to be the result of southward advection of fresh and cool water, formed in the northern Bay of Bengal during the monsoon, by the East Indian Coastal Current, as suggested by the large-scale salinity structure in the SODA re-analysis and the anti-cyclonic gyre in the northwestern Bay of Bengal during winter. The data further reveals an offshore front in January, which appears to be the result of a meso-scale re-circulation around an eddy, bringing cold and freshwater from the northern Bay of Bengal further away from the shore. Our cruise data hence illustrates that very strong salinity fronts can appear in the Bay of Bengal after the monsoon, as a result of intense coastal circulation and stirring by eddies. © 2013 Springer-Verlag Berlin Heidelberg.

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