不同台风合成风场方案在南海的适用性研究

A Study on the Applicability of Different Typhoon Synthetic Wind Fields in the South China Sea

我国南海地区常受台风侵扰,台风场是研究台风浪灾害以及风暴增水灾害的必要条件之一。因遥感风场存在台风大风圈附近风速明显偏小的问题,所以在台风场相关研究中,多采用台风模型风场和背景风场相结合的方式——即合成风场。本文选取南海相关研究中常用的3种台风场模型,对比其特点,并采用NECP CFSR作为背景风场,将合成风场和实际观测风速进行对比,结果显示在南海地区采用Jelesnianski模型得出的风场和实际风场吻合度最好,建议在该风场基础上考虑南海的地理特殊性,进行台风场模型的改进。

South China Sea is often affected by typhoon.Typhoon field is one of the necessary conditions for the researches of typhoon storm and typhoon waves.Because the wind speed near the typhoon center in the remote sensing wind field is obviously smaller than the real,the typhoon model wind field and the background wind field are combined in the study of typhoon related researches.In this study,three kinds of typhoon models commonly used are selected and compared.The results showed that the winds obtained by the Jelesnianski model in the South China Sea is the best.It is suggested that the typhoon field model in South China Sea should be improved on the basis of that model.