Please use this identifier to cite or link to this item: http://nopr.niscair.res.in/handle/123456789/35711
Title: Relation between Sonic Layer and Mixed layer depth in the Arabian Sea
Authors: Bhaskar, TVS Udaya
Swain, Debadatta
Keywords: Sonic Layer Depth;Mixed Layer Depth;Argo;Arabian Sea;Temperature Inversion
Issue Date: Oct-2016
Publisher: NISCAIR-CSIR, India
Abstract: Seasonal evolution of the sonic layer depth and its relation to mixed layer depth in the Arabian Sea is studied. Monthly sonic layer depth climatology is constructed using Argo temperature and salinity and compared with mixed layer depth. Sonic layer depth showed semiannual variability with peaks during June – August and December – February and lows during pre and post monsoon season. Sonic layer depth is observed to be shallower than mixed layer depth over most of the Arabian Sea except in the southeastern Arabian Sea during winter owing to temperature inversions. Sonic layer and mixed layer depth is observed to have high correlation (> 0.85) over most of the Arabian Sea indicating a good relationship between them, except in south eastern Arabian Sea. SLD is found to be deeper than MLD only in the southeastern AS (SEAS) during the winter season due to the presence of temperature inversions (TI) which are common phenomenon during that period. Advection of cooler low-salinity water over warmer salty SEAS water leads to the formation of TI in SEAS. Sound velocity being sensitive to temperature, results in deepening of SLD in this region. This can be used to understand relation between them to a great degree of accuracy and estimate one from the other.
Page(s): 1264-1271
URI: http://nopr.niscair.res.in/handle/123456789/35711
ISSN: 0975-1033 (Online); 0379-5136 (Print)
Appears in Collections:IJMS Vol.45(10) [October 2016]

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