热带气旋风暴潮模拟中的海面风场特征对比研究

Comparison study on the sea surface wind in the storm surge simulation induced by tropical cyclone

该文以1997年热带气旋Winnie(1997)在我国登陆前后时段为例,对热带气旋风暴潮数值模拟中常用的Holland经验模型风场和多重嵌套中尺度气象数值模式模拟风场的结构和时间演变特征进行了对比分析,结果表明,经验模型风场对实际热带气旋风场的刻画存在诸多缺陷,这些缺陷对于热带气旋风暴潮的准确模拟将产生不可忽视的影响,特别是有可能影响到风暴潮增水过程初振和余振的机理,用中尺度热带气旋数值模式模拟风场取代经验模型风场将是准确刻画热带气旋风暴潮增减水过程的有效手段。文中还讨论了采用经验模型风场存在的具体问题。

In this paper, the comparison study of the surface wind over ocean, provided by the empirical wind mode and the meso-scale tropical cyclone numerical model respectively, was conducted during landfall period of tropical cyclone Winnie (1997).The results show that there are shortcomings in the structure and time-evolution of tropical cyclone with an empirical wind mode, which will distort the pile-up process significantly in storm surge simulation and prediction induced by tropical cyclone, especially for the...