中文摘要：

引入新动力因子位温平流项与广义位温耦合水平通量参数（the Potential Temperature Coupling Flux Parameter,简称PTCF）的定义,即位温平流项与广义位温的雅可比行列式,对登陆台风＂韦帕＂（Wipha）及其雨带的移动进行了诊断分析,发现台风中心会向新动力因子绝对值（｜G｜）的垂直平均值最大值处移动;｜G｜垂直平均值大值区的移动和变化早于台风中心的移动,对台风登陆与登陆后的移动路径有一定指示作用。为便于推导新动力因子的演变方程,还利用ARPS模式的资料同化模块对NCEP每6 h一次的全球最终分析资料（FNL）与MICAPS系统下全球地面资料和探空资料进行四维同化,插值到等高坐标系下,计算并分析了PTCF的平流项与4个阻力项分别影响台风及其降水移动的相对重要性。

英文摘要：

A new dynamic factor the Potential Temperature Coupling Flux Parameter（PTCF）,as the Jacobian of the advection term of potential temperature and the general potential temperature,is defined.Its dignosis on landfalling typhoon ＂Wipha ＂ and rain belt moving is analyzed.It is found that the typhoon eye will move to the biggest value areas of the absolue vertical average of the PTCF（shortly as ｜ G ｜）.The moving or variation of the bigger value areas of ｜ G ｜ is earlier than that of the typhoon eye,so it can forebode the landfall or diversion of the typhoon.The dynamoic mechanism why the PTCF can diagnosis the path of typhoon is analyzed.In order to deduce the evolution equations of the PTCF,the NCEP FNL data,the surface data and the sounding data of the MICAPS are assimilated and interpolated to a constant altitude coordinates via some modules of the nonstatic mesoscale model ARPS（The Advanced Regional Prediction System）.The advection term and 4 resistance terms of the PTCF are calculated,their relations with typhoon and its rain belt are discussed.