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On an upwelling front, propagation of upwelling and vertical velocity in the eastern Arabian sea during monsoon, 1987

DRS at CSIR-National Institute of Oceanography

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Title On an upwelling front, propagation of upwelling and vertical velocity in the eastern Arabian sea during monsoon, 1987
 
Creator Antony, M.K.
Unnikrishnan, A.S.
 
Subject coastal upwelling
oceanic fronts
velocity
hydrographic data
winds
monsoons
 
Description A coastal upwelling front parallel to the coast and identifiable upto a depth of 75 m was observed between 12.5 and 16 degrees N along the eastern Arabian Sea in September, 1987 from closely spaced digital BT data. With a north-south slope in the thermocline, the front has a temperature gradient of about 6 degrees C over a distance of 30-50 km and appears to be closer to the coast on the northern side than the southern side. Information derived from data during July 1987 shows no such front upto 30-m depth at this location. An estimate based on the positions of isotherms indicates offshore movement of surface water at a rate of about 1-2 km/day from July to September. Vertical velocities computed in the frontal region using the conservation equation of temperature show an average value of -2.77 x 10 sup(-2) cm/sec which is indicative of upwelling. A comparison of offshore volume transport and a temperature anomaly near the coast did not show good correlation. These observations suggest that upwelling along this coast propagates from south to north in the form of a coastally trapped wave
 
Date 2009-05-08T12:14:08Z
2009-05-08T12:14:08Z
1992
 
Type Conference Article
 
Identifier Proceedings of the PORSEC-'92 in Okinawa, Conference for Pacific Ocean Environments and Probing, 25-31 August, 1992, Okinawa, Japan. Vol. 1, 527-532p.
http://drs.nio.org/drs/handle/2264/3133
 
Language en
 
Rights Copyright [1992]. All efforts have been made to respect the copyright to the best of our knowledge. Inadvertent omissions, if brought to our notice, stand for correction and withdrawal of document from this repository.
 
Publisher PORSEC Committee, Shimizu, Japan