West India coastal current and Lakshadweep high/low

Shetye, Satish R. (1998) West India coastal current and Lakshadweep high/low Sadhana (Academy Proceedings in Engineering Sciences), 23 (5-6). pp. 637-651. ISSN 0256-2499

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Official URL: http://www.ias.ac.in/j_archive/sadhana/23/5and6/63...

Related URL: http://dx.doi.org/10.1007/BF02744586


The West India Coastal Current (WICC) flows northward during November-February and southward during April-September. At the time of formation of the northward (southward) phase of the current, a high (low) in sea level-the Lakshadweep High (Low), forms off southwestern India, and migrates westward across the Arabian Sea. The annual cycle of the WICC and that of the Lakshadweep High/Low arise from a set of circumstances that are special to the North Indian Ocean. This relatively small tropical basin is driven by seasonal monsoon winds. As a result, its wind-driven near-surface circulation consists primarily of annual and semi-annual long, equatorially-trapped Kelvin and Rossby waves, and coastally-trapped Kelvin waves. In terms of these waves, the West India Coastal Current is a superposition of annual and semiannual coastally-trapped Kelvin waves. The Lakshadweep High/Low forms when the Kelvin waves, on turning around Sri Lanka, and propagating northward along the west coast of India, radiate Rossby waves.

Item Type:Article
Source:Copyright of this article belongs to Indian Academy of Sciences.
Keywords:West India Coastal Current; Lakshadweep Sea; Coastal Dynamics; Kelvin Waves; Rossby Waves
ID Code:61517
Deposited On:15 Sep 2011 12:58
Last Modified:18 May 2016 11:11

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