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An intrathermocline eddy and a tropical cyclone in the Bay of Bengal

DRS at CSIR-National Institute of Oceanography

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Title An intrathermocline eddy and a tropical cyclone in the Bay of Bengal
 
Creator Gordon, A.L.
Shroyer, E.
Murty, V.S.N.
 
Subject Meteorology and climatology
Oceanography and limnology
Oceanography and limnology
 
Description The Bay of Bengal, subjected to monsoonal forcing and tropical cyclones, displays a complex field of ocean eddies. On 5 December 2013 a sub-surface vortex or Intrathermocline Eddy (ITE) composed of water characteristic of the Andaman Sea was observed within the thermocline of the western Bay of Bengal. We propose that the ITE was the product of Tropical Cyclone Lehar interaction on 27 November 2013 with a westward propagating surface eddy from the eastern Bay of Bengal. While Lehar’s interaction with the ocean initially removes heat from the upper layers of the eddy, air-sea flux is limited as the deeper portions of the eddy was subducted into the stratified thermocline, inhibiting further interaction with the atmosphere. The ITE core from 30 to 150 m is thus isolated from local air-sea fluxes by strong stratification at the mixed layer base, and its periphery is stable to shear instability, suggestive of longevity and the ability to carry water far distances with minimal modification.
 
Date 2017-09-22T09:29:13Z
2017-09-22T09:29:13Z
2017
 
Type Journal Article
 
Identifier Scientific Reports, vol.7; 2017; No.46218 doi:10.1038/srep46218
http://drs.nio.org/drs/handle/2264/5122
 
Language en
 
Rights This is an open access article published © 2017 Macmillan Publishers Limited, part of Springer Nature. All Rights Reserved.
 
Publisher Nature Publishing Group