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    A subsurface cyclonic eddy in the Bay of Bengal

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    J_Mar_Res_49_403.pdf (330.5Kb)
    Date
    1991
    Author
    Babu, M.T.
    PrasannaKumar, S.
    Rao, D.P.
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    Abstract
    CTD data collected from the Northwestern Bay of Bengal during late July 1984 reveal the existence of a cold core subsurface eddy centred at 17 degrees 40'N and 85 degrees 19'E. The thermal structure observed across the eddy indicate that it was confined to a level well below the mixed layer, between 50 and 300 db, and that it had a diameter of about 200 km. a temperature drop of 4-5 degrees C as compared with the surrounding was observed at the center of the eddy. A plausible mechanism for the eddy generation is baroclinic instability at the interface of two opposing boundaries currents present along the shelf edge of the western boundary of the Bay of Bengal. The southward current in the northern bay results partly from fresh water influx and to a larger extent from the action of wind stress curl while in the southern part the northward current is purely wind-driven. High stratification causEd. by fresh water influx prevented the eddy from being detected at the surface.
    URI
    http://drs.nio.org/drs/handle/2264/3342
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