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Life cycle of eddies along the western boundary of the Bay of Bengal and their implications

DRS at CSIR-National Institute of Oceanography

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Title Life cycle of eddies along the western boundary of the Bay of Bengal and their implications
 
Creator Nuncio, M.
PrasannaKumar, S.
 
Subject thermohaline circulation
temperature
salinity
oceanic eddies
western boundary currents
 
Description Analysis of vertical thermohaline structure along the western boundary of the Bay of Bengal revealed many undulations during April–May 2003. A prominent feature noticed was a dome in the northwestern boundary of the Bay of Bengal, which was found to be a cyclonic eddy (NCE). This eddy altered the ambient temperature by 6 degrees C and salinity by 0.8 psu. NCE was formed from a meander generated out of an instability due to cross-shore density gradient in the northeastward flowing western boundary current during early February. The cross-shore density gradient was developed under the influence of cyclonic (upwelling)/anticyclonic (downwelling) wind stress curl along the western boundary/open ocean region and the westward propagating Rossby wave. EOFs of SLA showed that annual cycle (EOFs 1 and 2) accounts for 39% of the total variance, while meso-scale eddies contributed up to 25% of the variance. Meso-scale eddies dominate the BOB circulation and are able to enhance the surface chlorophyll whenever the stratification is weak as in the case of intermonsoon 2003.
 
Date 2012-02-22T04:46:03Z
2012-02-22T04:46:03Z
2012
 
Type Journal Article
 
Identifier Journal of Marine Systems, vol.94; 2012; 9-17
no
http://drs.nio.org/drs/handle/2264/4019
 
Language en
 
Relation J_Mar_Syst_94_9.jpg
 
Rights An edited version of this paper was published by Elsevier. Copyright [2011] Elsevier
 
Publisher Elsevier