对“麦莎”路径及造成黄渤海域大风浪的数值模拟

Simulation of Typhoon Matsa's Track and Strong Winds and High Waves over Yellow Sea and Bohai by MM5 and SWAN

2005年9号热带风暴“麦莎”8月8日凌晨开始影响大连,到10日过程完全结束,历时近两天,不仅造成了暴雨(局部大暴雨)天气,而且大连海区出现最大风力8-9级、阵风11级的大风。此时适逢天文大潮高峰期,渤海和黄海北部海域出现4 m以上的浪高,形成了风暴潮。利用MM5模式和第三代浅水波浪数值预报SWAN模式,对“麦莎”的移动路径以及“麦莎”造成黄渤海域的强风场、强浪场进行模拟,结果与实况基本一致,并且通过模拟,对缺少资料的海面风场、浪高场有更全面的了解。

The Typhoon Matsa affected Dalian on 8 August 2005. During the process, heavy or severe rainfall occurred in Dalian, and strong winds and high waves were observed over the sea area around Dalian with the wind force being force 7 to force 8, even up to force 11 instantaneously, which came across the astronomical tide peak, resulting the waves of more than 4 meter high and the storm surge over the Bohai Sea and the northern Huanghai Sea. By means of MM5 model and the third generation of shallow-water wave model SWAN, the simulation is conducted on the moving track of Typhoon Matsa and the winds and waves caused by Matsa. The simulated result is in accordance with the actual condition basically.