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Discrete Dynamics in Nature and Society
Volume 2014 (2014), Article ID 282085, 8 pages
http://dx.doi.org/10.1155/2014/282085
Research Article

A Numerical Simulation of Extratropical Storm Surge and Hydrodynamic Response in the Bohai Sea

1Physical Oceanography Laboratory, Ocean University of China, Qingdao 266100, China
2School of Science, Tianjin University of Science and Technology, TEDA, Tianjin 300457, China
3College of Marine Science and Engineering, Tianjin University of Science and Technology, TEDA, Tianjin 300457, China

Received 24 September 2013; Revised 15 January 2014; Accepted 19 January 2014; Published 10 March 2014

Academic Editor: Qi-Ru Wang

Copyright © 2014 Yumei Ding and Lei Ding. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

A hindcast of typical extratropical storm surge occurring in the Bohai Sea in October 2003 is performed using a three-dimensional (3D) Finite Volume Coastal Ocean Model (FVCOM). The storm surge model is forced by 10 m winds obtained from the Weather Research Forecasting (WRF) model simulation. It is shown that the simulated storm surge and tides agree well with the observations. The nonlinear interaction between the surge and astronomical tides, the spatial distribution of the maximum surge level, and the hydrodynamic response to the storm surge are studied. The storm surge is the interaction of the surge and the astronomical tides. The currents change rapidly during the storm surge and turn to be the unidirectional at some places where the tidal currents are usually rectilinear. The results show that the local surge current velocity in each depth, with a magnitude of the same order as the astronomic tidal currents, increases or decreases rapidly depending on the relationship between the winds and current directions. Furthermore, the current pattern gets more complicated under the influence of the direction of the winds, which might affect sand movement in the coastal water of the Bohai Sea.