热带气旋登陆衰减模型改进

Improvement of Tropical Cyclone Landfall Attenuation Model

通过优化区域划分并引入热带气旋登陆时移动方向角和海陆交界区域陆地比,对Vickery模型进行改进。以东南沿海区域登陆的热带气旋为例,将改进模型给出的热带气旋中心压差模拟结果与热带气旋观测值以及既有方法模拟结果进行对比。结果表明,改进模型利用热带气旋登陆时的移动方向强化了深入陆地热带气旋中心压差模拟效果,利用陆地比强化了海岸线附近热带气旋中心压差模拟效果。

The Vickery model is improved by optimizing the regional division,and introducing the direction angle of tropical cyclone movements and the land ratio of sea-land alternate zones in this paper.Taking the tropical cyclone landing in the southeast coastal area as an example,the simulated central pressure difference value of the improved model for the tropical cyclone is compared with the observed value and the simulated result of existing models.The results show that the improved model enhances the central pressure difference simulation effect of the tropical cyclone penetrating the land with the direction of tropical cyclone movement when landing,and enhances the central pressure difference simulation effect of the tropical cyclone near the coastline with the land ratio.