基于YanMeng模型模拟台风的初步探索

利用风场模型对台风进行数值模拟得到极值风速这一方法已被广泛应用.首先详细介绍YanMeng风场模型物理模型及数值解法;着重强调该模型中的两个随机参数:Holland参数B、等效粗糙长度z_0,讨论了它们对气压场及风速的影响程度,并给出相应取值方法;最后以YanMeng风场模型作为技术背景,根据厦门气象局提供的实测台风数据对台风DAN进行数值模拟,得到梯度风场以及台风影响下厦门地区表面风速,以证明YanMeng 风场模型的可行性.

Initiative Research on Typhoon Simulation by YanMeng Wind Field Model

Many kinds of analytical models have been developed for simulating the typhoon wind field to access possible extreme wind velocity.YanMeng wind field model and the solution scheme are introduced to make some basic researches on wind field in this study.Two stochastic parameters,Holland parameter B and equivalent roughness length z_0 ,are presented to discuss their sensitivity indices about pressure field and wind velocity.Finally the results of Typhoon DAN simulated by YanMeng model are illuminated through comparison with the observation data.The calculated results of simulated wind field are so agreeable with the observed data to certify the applicability of YanMeng model in the simulation of wind field induced by typhoon.