台湾海峡三维风海流的数值模拟

作者：任华堂  刘钦政  吴辉碇

单位：国家海洋环境预报中心, 北京

关键词：POM模式 风海流 水位 流场 台湾海峡

分类号：P445

出版年·卷·期（页码）：2002·2002·第四期（24-32）

摘要：

本文利用POM模式模拟了季风在台湾海峡引起的风海流以及三维流场结构。在冬季和夏季两种条件下,得出了季风引起的水位变化和三维流场结构。结果显示在冬季季风的作用下,海峡的东部和北部发生减水而西南部产生增水;在夏季海峡北部产生增水而东南部和西南部产生减水。在科氏力的作用下,风海流表层流向偏于风向右侧。风海流在20m处形成的流场和底层流场本文也给出了模拟结果。流速的艾克曼螺线显示:该海域的流速并不随水深加大而一致减小,而是先减小至一定深度再稍微增大,然后继续衰减至零。

Based on the POM model, the numerical simulation of wind current is studiedunder monsoon condition in Taiwan Strait. It is disclosed how the surface elevation and 3D velocity structure distribute in Taiwan Strait. In winter, the surface elevation of the southwest turns higher while the east and north lower, and in summer the north turns higher while the southwest and southeast lower. The outcome shows that the surface velocity direction is deviated from the wind. The velocity field at 20m depth and bottom is also discussed in this paper. This paper also shows how the velocity varies with depth, and draw a conclusion that the maximum velocity is not in the surface but in a certain depth.

参考文献：

[1] Blumburg A F, Melior G L. A description of a three-dimension coastal ocean circulation model In: Three Dimensional Coastal Models (N. Heaps, ed), 208, American Geophysical Union. Washington DC., 1987. [2] Melior, G. L., S. Hakkinen, T. EzerandR. Patchen, A generalization ora sigma coordinate ocean model and anintercomparison of model vertical grids, In: Ocean Forecasting: Conceptual Basis and Applications, N. Pinardi and J.D. Woods (Eds.), Springer, 2002, 55～72. [3] Mellor, G. L., and T. Yamada, Development of a turbulence closure model for geophysical fluid problems, Rev. Geophys.Space Phys., 1982,20:851～875. [4] 吴伯瑜.台湾海峡风海流的数值计算.海洋学报,1982,4(2):139～148. [5] 陆凤山等.台湾海峡一种三维风海流数值计算模式.台湾海峡,1997,16(4):434～440.

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