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Annales Geophysicae An interactive open-access journal of the European Geosciences Union
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Volume 28, issue 3
Ann. Geophys., 28, 817–824, 2010
https://doi.org/10.5194/angeo-28-817-2010
© Author(s) 2010. This work is distributed under
the Creative Commons Attribution 3.0 License.
Ann. Geophys., 28, 817–824, 2010
https://doi.org/10.5194/angeo-28-817-2010
© Author(s) 2010. This work is distributed under
the Creative Commons Attribution 3.0 License.

ANGEO Communicates 19 Mar 2010

ANGEO Communicates | 19 Mar 2010

Waves in shallow water off west coast of India during the onset of summer monsoon

V. Sanil Kumar1, C. Sajiv Philip1, and T. N. Balakrishnan Nair2 V. Sanil Kumar et al.
  • 1Ocean Engineering Division, National Institute of Oceanography (Council of Scientific & Industrial Research), Dona Paula, Goa 403 004, India
  • 2Indian National Centre for Ocean Information System (Ministry of Earth Sciences), P.O. 21, IDA-Jeedimetla, Hyderabad – 72, India

Abstract. The wave growth characteristics during the onset of summer monsoon in a swell dominated open ocean at a location off the west coast of India at 14 m water depth are studied. 67% of the measured waves are due to the swells arriving from south and south-west and the balance was due to the seas from south-west to north-west. Wave age of the measured data indicates that the measured waves are young sea with presence of swells. Even when the wind speed reduced to less than 3 m/s, significant wave height more than 2 m is present due to the swells in the Arabian Sea. The maximum wave height increased from 2 to 8 m within 60 h. The mean wave directions at the high frequencies align with the westerly wind direction and gradually shift to south-westerly swell direction at low frequencies during the wave growth. The strong westerly winds present between longitude 72° and 72.5° at latitude 12.5° has created the high waves (Hm0 upto 5.65 m) during the measurement period.

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