Shapiro台风风场模型及其数值模拟

Shapiro typhoon wind-field model and its numerical simulation

我国东南沿海是世界上台风最集中的地区之一,也是我国经济最发达和财富最集中的地区,台风引起的灾害损失巨大。数值模拟方法是目前进行台风危险性分析和估算极值风速普遍采用的方法,已有较多风场模型应用于台风区的极值风速估算,Shapiro风场模型是其中之一。首先介绍了Shapiro台风风场模型,然后采用有限差分法求解描述该风场模型的非线性偏微分方程组,利用两个实测台风的风速记录对该模型进行了验证,对该风场模型在我国东南沿海地区的应用做了初步尝试。

China southeast coast, the most developed area in China, is one of the most typhoon-prone areas in the world, and the loss caused by typhoon damage is tremendous. Method for numerical simulation of typhoons is commonly used in typhoon risk analysis. Among the numerous typhoon wind field models is the Shaprio model. The Shapiro wind field model is introduced first in this paper, and then a finite-difference scheme to solve the group of nonlinear equations, which represents the wind field model, is proposed. The wind field model and solution are verified by two observed typhoon records, and the applicability of this model for China southeast coast is discussed.