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dc.contributor.authorNisha, K.
dc.contributor.authorRao, S.A.
dc.contributor.authorGopalakrishna, V.V.
dc.contributor.authorRao, R.R.
dc.contributor.authorGirishKumar, M.S.
dc.contributor.authorPankajakshan, T.
dc.contributor.authorRavichandran, M.
dc.contributor.authorRajesh, S.
dc.contributor.authorGirish, K.
dc.contributor.authorJohnson, Z.
dc.contributor.authorAnuradha, M.
dc.contributor.authorGavaskar, S.S.M.
dc.contributor.authorSuneel, V.
dc.contributor.authorKrishna, S.M.
dc.date.accessioned2009-11-17T11:52:18Z
dc.date.available2009-11-17T11:52:18Z
dc.date.issued2009
dc.identifier.citationJournal of Physical Oceanography, vol.39(5); 1184-1199
dc.identifier.urihttp://drs.nio.org/drs/handle/2264/3451
dc.description.abstractRepeat XBT transects made at near-fortnightly intervals in the Lakshadweep Sea (southeastern Arabian Sea) and ocean data assimilation products are examined to describe the year-to-year variability in the observed near-surface thermal inversions during the winter seasons of 2002-06. Despite the existence of a large low-salinity water intrusion into the Lakshadweep Sea, there was an unusually lower number of nearsurface thermal inversions during the winter 2005/06 compared to the other winters. The possible causative mechanisms are examined. During the summer monsoon of 2005 and the following winter season, unusually heavy rainfall occurred over the southwestern Bay of Bengal and the Lakshadweep Sea compared to other years in the study. Furthermore, during the winter of 2005, both the East India Coastal Current and the Winter Monsoon Current were stronger compared to the other years, transporting larger quantities of low salinity waters from the Bay of Bengal into the Lakshadweep Sea where a relatively cooler near-surface thermal regime persisted owing to prolonged upwelling until November 2005. In addition, the observed local surface wind field was relatively stronger, and the net surface heat gain to the ocean was weaker over the Lakshadweep Sea during the postmonsoon season of 2005. Thus, in winter 2005/06, the combination of prolonged upwelling and stronger surface wind field resulting in anomalous net surface heat loss caused weaker secondary warming of the near-surface waters in the Lakshadweep Sea. This led to a weaker horizontal sea surface temperature (SST) gradient between the Lakshadweep Sea and the intruding Bay of Bengal waters and, hence, a reduced number of thermal inversions compared to other winters despite the presence of stronger vertical haline stratification.
dc.language.isoen
dc.publisherAmerican Meteorological Society
dc.rightsAn edited version of this paper was published by American Meteorological Society. Copyright [2009] American Meteorological Society
dc.subjectthermal inversions
dc.subjectmonsoon
dc.subjectsea surface temperature
dc.subjectCoastal Current
dc.titleReduced near-surface thermal inversions in 2005-06 in the southeastern Arabian Sea (Lakshadweep Sea)
dc.typeJournal Article


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