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Dynamics of tidal and non-tidal currents along the southwest continental shelf of India

DRS at CSIR-National Institute of Oceanography

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Title Dynamics of tidal and non-tidal currents along the southwest continental shelf of India
 
Creator Aruna, C.
Ravichandran, C.
Srinivas, K.
Rasheed, P.A.A.
Lekshmi, S.
 
Subject tidal currents
tidal dynamics
continental shelves
time-series analysis
tide gauges
 
Description The tidal regimes over the continental shelves are often less documented due to lack of coastal water level data. This is of concern since continental shelves rule the global dissipation of tidal energy. The tides along the Southwest Indian shelf are predominantly mixed, semidiurnal in nature. Motion over any continental shelf is governed by the tide-driven oscillatory flow. In this paper, tidal and non-tidal characteristics of the waters of Southwest continental shelf of India are assessed using the observed time-series of water level collected during November- December 2005, from four tide gauge stations distributed along the southwest shelf of India. The tidal amplitudes showed a general decrease from north to south. Harmonic analysis of the tidal constituents showed the prominent tidal constituent to be M sub(2) followed by K sub(1), S sub(2) and O. The non-tidal sea-level along the shelf, showed a northward propagation with periodicities of several days. Local wind patterns and pressure systems play an increasingly important role in controlling the non-tidal circulation in this region.
 
Date 2008-01-31T11:10:37Z
2008-01-31T11:10:37Z
2007
 
Type Conference Article
 
Identifier METOC - 2007. Proceedings of the National Symposium on 'Emerging Tredns in Meteorology and Oceanography', 21-22 May 2007, eds. Vijayakumar, D.; Jothiraman, V.; Jyothi, A.K.; Satya Prakash; Krishna, M.S.H. 359-364p.
http://drs.nio.org/drs/handle/2264/788
 
Language en
 
Publisher School of Naval Oceanology and Meteorology