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Influence of Winds on Temporally Varying Short and Long Period Gravity Waves in the Near Shore Regions of Eastern Arabian Sea : Volume 9, Issue 5 (25/09/2012)

By Glejin, J.

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Book Id: WPLBN0003984459
Format Type: PDF Article :
File Size: Pages 27
Reproduction Date: 2015

Title: Influence of Winds on Temporally Varying Short and Long Period Gravity Waves in the Near Shore Regions of Eastern Arabian Sea : Volume 9, Issue 5 (25/09/2012)  
Author: Glejin, J.
Volume: Vol. 9, Issue 5
Language: English
Subject: Science, Ocean, Science
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Publication Date:
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications


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Balakrishnan Nair, T. N., Singh, J., Kumar, V. S., & Glejin, J. (2012). Influence of Winds on Temporally Varying Short and Long Period Gravity Waves in the Near Shore Regions of Eastern Arabian Sea : Volume 9, Issue 5 (25/09/2012). Retrieved from

Description: Ocean Engineering, CSIR-National Institute of Oceanography (Council of Scientific & Industrial Research), Dona Paula, Goa 403 004, India. Wave data collected off Ratnagiri, west coast of India during 1 May 2010 to 30 April 2012 is used in the study. Seasonal and annual variation in wave data controlled by the local wind system such as sea breeze and land breeze, and remote wind generated long period waves observed along the west coast of India, is studied. Sea breeze plays an important role in determining the sea state during pre and post monsoon seasons and the maximum wave height is observed during peak hours of sea breeze at 15:00 UTC. Long period waves (peak period over 13 s) are observed mainly during the pre and the post monsoon season. Maximum peak period observed during the study is 22 s and is in the month of October. Long period waves observed during the south west monsoon period of 2011 are identified as swell propagated from the Southern Ocean with an estimated travelling time of 5–6 days. The swells reaching the Arabian Sea from the South Indian Ocean and Southern Ocean, due to storms during the pre and post monsoon periods will modify the near surface winds, due to the dominant wave induced wind regime. Energy spectrum of observed waves indicates onset and decline of strong south west monsoon winds. Convergence of energy-containing frequency bands corresponding to short period waves (Tp < 8 s) and long period waves (Tp > 13 s) to intermediate period waves (8 < Tp < 13 s) are observed at the end of the pre monsoon season; divergence is observed during the start of the post monsoon period from intermediate period waves to short period waves and long period waves. South west monsoon period is characterized by the energy corresponding to the frequency band of intermediate period waves along the west coast of India.

Influence of winds on temporally varying short and long period gravity waves in the near shore regions of Eastern Arabian Sea

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