A numerical study of storm surges caused by cold-air outbreaks in the Bohai Sea |
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Authors: | Peng Zhao Wensheng Jiang |
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Institution: | (1) Physical Oceanography Laboratory, Ocean University of China, 238 Song-Ling Road, Qingdao, 266100, China |
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Abstract: | Storm surges in the Bohai Sea are not only associated with tropical cyclones and extra-tropical cyclones, but also cold-air
outbreaks. Cold-air outbreaks attack China from four major tracks, with each track having its own prevailing wind over the
Bohai Sea. As the pressure field of cold-air outbreaks can be converted into the surface wind, storm surges can be investigated
by the pressure field of cold-air outbreaks entirely. This paper took the different major tracks, pressure field, and high
wind period into consideration and constructed 20 scenarios to describe the actual situation of cold-air outbreaks. Based
on the results modeled by FVCOM, the influence of various cold-air outbreaks on the maximum surge in the Bohai Sea and the
probability of the surge elevation at three typical tide gauges were investigated. Finally, a powerful decision-making tool
to estimate storm surges induced by cold-air outbreaks was provided. |
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