| 摘要: |
| 本文采用Liu and Leendertse (1978) 的三维有限差分格式,对在1949-1987年期间对北部湾海区有较大影响的41场热带气旋作了风海流数值后报,后报的风暴潮与实测符合良好。为满足海洋工程的需要,本文还对涠洲岛西南海域某站的后报海流结果进行了分析,将该站各次台风的最大流速与极值分布拟合,给出各重现期海流值,同时对8303号台风的流场分布也作了分析。
要获得由台风引起的风海流及对应各重现期的极值作出推断,目前只能采取对台风风海流的数值后报方法,本模式计算范围西面以越南东岸为界,东面到雷州半岛、海南岛的西岸及109°30′E子午线,南至17°N(图1)。网格点的水平距离为13.8375km,垂直方向从海平面起算分为3层(0-10m,10-30m,30m-海底)。本文重点研究的站位位于涠洲岛西南(图1中A点所示),其水深为42m、所给出的风海流可代表5m、20m、36m处的数值。 |
| 关键词: 北部湾台风、风海流、三维数值 |
| DOI： |
| 分类号: |
| 基金项目:中国科学院海洋研究所调查研究报告第2412号 |
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| THREE-DIMENSIONAL NUMERICAL HINDCASTS OF THE TYPHOON-GENERATED CURRENTS IN BEIBU GULF |
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Yu Kejun1, Fang Guohong1, Wang Xinyi1, Shi Jianji2
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1.Institute of Oceanology, Academia Sinica;2.China Offshore Oil Nanhai West Corp
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| Abstract: |
| The tropical-cyclone-generated currents for the severest 41 events in the Gulf of Tonkin (Beibu Gulf) during 1949-1987 were numerically hindcasted by using Liu and Leendertse's (1978) finite-difference model. The hindcasted storm surges agreed satisfactorily with the observed values. To meet the need of engineering design an extreme value analysis was carried out to obtain extreme current speeds corresponding to various return periods. An analysis of the current field generated by the typhoon No.8303(Vera, 1983) is also reported in the present paper. |
| Key words: BEIBU GULF,TYPHOON-GENERATED CURRENTS,THREE-DIMENSIONAL NUMERICAL HINDCASTS |
