Wind wave effects on hydrodynamic modeling of ocean circulation in the South China Sea

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Title Wind wave effects on hydrodynamic modeling of ocean circulation in the South China Sea
Author Zhang, Hong; Sannasiraj, S.A.; Chan, Eng Soon
Journal Name The Open Civil Engineering Journal
Year Published 2009
Place of publication Netherlands
Publisher Bentham Science Publishers
Abstract Wind, wave and current interactions control the boundary fluxes, momentum and energy exchange between the atmosphere and the ocean, and within the water column. The wind wave effect on the circulation is investigated in a three-dimensional time-dependant ocean circulation model. This POM (Princeton Ocean Model) based model is implemented with realistic coastlines in South China Sea and emphasizes the simulation of physical parameters in the water column. Taking account of the wind waves, an increase in air-sea drag coefficient, reflecting an enhanced sea surface roughness due to increased wave heights, is shown to improve the simulated surface current and the sea surface elevation. It is also found that developing waves with smaller peak periods influenced the surface circulation more significantly. The inclusion of the wind wave parameterization also affects the current near the seabed in the shallow water. The model is validated against current, temperature and salinity data measured in the Asian Seas International Acoustics Experiment (ASIAEX). The simulation results in the period of April - May 2001 show that wave-induced surface stress increases the magnitude of currents both at the surface and near the seabed. On the other hand, wave-induced bottom stress retards the near bottom currents in shallow water. Therefore the net effect of wind waves on circulation depends on the significance of current and elevation changes due to wind waves through both the surface and the bottom.
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Copyright Statement Copyright remains with the authors 2009. This is the author-manuscript version of this paper. It is posted here with permission of the copyright owner[s] for your personal use only. No further distribution permitted. For information about this journal please refer to the journal's website or contact the authors.
Volume 3
Page from 48
Page to 61
ISSN 1874-1495
Date Accessioned 2009-09-02
Language en_AU
Faculty Faculty of Science, Environment, Engineering and Technology
Subject PRE2009-Ocean Engineering
Publication Type Journal Articles (Refereed Article)
Publication Type Code c1e

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