Numerical simulation and dynamic study of the wintertime circulation of the Bohai Sea |
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Authors: | Fang Yue Fang Guo-hong Zhang Qing-hua |
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Institution: | (1) Institute of Oceanology, Chinese Academy of Sciences, 266071 Qingdao, China;(2) Key Laboratory of Marine Science and Numerical Modelling, SOA, 266003 Qingdao, China;(3) Department of Oceanography, Texas A&M University, 77840-3146 College Station, TX, USA |
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Abstract: | This numerical study of the Bohai Sea wintertime circulation by means of a two dimensional barotropic model with resolution
of 1/24° in longitude and latitude showed that the Bohai Sea wintertime circulation is dominated by local monsoon winds. The
major current components include the Bohai Warm Current, the North Shandong Coastal Current, and the Liaodong Gyre. The Bohai
Warm Current originates from the Yellow Sea Warm Current at the northern part of Bohai Strait, meanders westwards and finally
enters the northern part of Bohai Bay. The North Shandong Coastal Current flows along the southwest shore of Bohai Bay and
Laizhou Bay and exits from the Bohai Sea through the south Bohai Strait. The anticyclonic Liaodong Gyre is located in the
north of Liaodong Bay. A pair of eddies and the small scale Jinzhou Gyre are found between the Bohai Warm Current and the
Liaodong Gyre. The computed volume transport for both the Bohai Warm Current and North Shandong Coastal Current is about 0.03
Sv (1 Sv=1×106 m3/s). The numerical experiments showed that the combined effect of local monsoon winds and bottom topography dominate the formation
of the circulation pattern. The Coriolis force and the wind stress curl are of certain importance. The beta effect, the momentum
advection and the open boundary condition have little influence on the circulation pattern.
Contribution No. 3467 from the Institute of Oceanology, Chinese Academy of Sciences.
Work supported by the Chinese Academy of Sciences (grant No. KZ952-J1-405) and the Key Laboratory of Marine Science and Numerical
Modelling, State Oceanic Administration. |
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Keywords: | Bohai Sea wintertime circulation dynamics numerical study |
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