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Relation between Sonic Layer and Mixed layer depth in the Arabian Sea

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Title Relation between Sonic Layer and Mixed layer depth in the Arabian Sea
 
Creator Bhaskar, TVS Udaya
Swain, Debadatta
 
Subject Sonic Layer Depth
Mixed Layer Depth
Argo
Arabian Sea
Temperature Inversion
 
Description 1264-1271
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.
 
Date 2016-10-18T06:06:19Z
2016-10-18T06:06:19Z
2016-10
 
Type Article
 
Identifier 0975-1033 (Online); 0379-5136 (Print)
http://nopr.niscair.res.in/handle/123456789/35711
 
Language en_US
 
Rights CC Attribution-Noncommercial-No Derivative Works 2.5 India
 
Publisher NISCAIR-CSIR, India
 
Source IJMS Vol.45(10) [October 2016]