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Studies of Upwelling along the West Coast of India using Geopotential Anomaly

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Title Studies of Upwelling along the West Coast of India using Geopotential Anomaly
 
Creator Lathipa, P. N.
Murty, A. V. S.
 
Description 219-223
As summer is the season of mixing and winter the season of stratification in the Arabian Sea along the west coast of India, summer minus winter dynamic depth which takes into account the interelated effects of temperature, salinity and pressure is considered to reveal regional differences of the intensity of upwelling relative to winter situation. The areas of intensive upwel1ing are thus identified. Stabilities of water layers during summer are examined with respect to those during winter. Deeper waters are relatively less stable during summer. Stability increases during summer in the middle range of thermocline depth (core of thermocline). More mixing is found in the subsurface in the case of the regions of intense upwelling. Following model is suggested for explaining upwelling in the waters: Upwelling during summer should ogcur in the deep waters and the upward currents should cease to exist through the core of thermocline which becomes more stratified disallowing upward movement of water. Heat and salt are, therefore, to be transferred from the depth where upwelling ceases to the subsurface and surface by means of eddy diffusion. A mixing at the top layers reduces the core of thermocline and thereby intensifies the process of vertical transfer of properties. Thus, the cumulative manifestation of the entire mechanism of the total process is to make the characteristic properties such as coldness and denseness of the deeper waters appear at the subsurface and surface layers. Effects of physical processes such as those of.horizontal advection, precipitation and river discharge are neglected in the analysis in order to make the model less cumbersome.
 
Date 2017-01-03T06:07:57Z
2017-01-03T06:07:57Z
1978-12
 
Type Article
 
Identifier 0975-1033 (Online); 0379-5136 (Print)
http://nopr.niscair.res.in/handle/123456789/39556
 
Language en_US
 
Rights CC Attribution-Noncommercial-No Derivative Works 2.5 India
 
Publisher NISCAIR-CSIR, India
 
Source IJMS Vol.07(4) [December 1978]