中文摘要：

位涡趋势（PVT）法可以计算非绝热加热等物理过程对台风移动的直接影响（非引导效应）。在成功模拟2009年第8号台风＂莫拉克＂移动路径和近地面最大风速的基础上,进一步考虑了台风不对称环流发展的影响,对原有的位涡趋势诊断法进行了改进,并首次将该方法应用于高分辨率数值模式模拟结果中,诊断不同物理过程对＂莫拉克＂移动的影响。分析表明,虽然非绝热加热等物理过程主要作用于维持台风＂莫拉克＂的垂直结构,但非绝热加热等物理过程引起的非引导效应也对＂莫拉克＂移动的短时振荡有重要作用。

英文摘要：

The potential vorticity tendency （PVT） approach can quantitatively estimate the direct contribution of diabatic heat ing and other physical processes （the non-steering effect） to tropical cyclone （TC） movement. Through the numerical simula tion of Typhoon Morakot （2009）, the original PVT diagnostic method is improved by including the development of TC asymmetric circulation, and then first uses the approach in the high resolution numerical model results to analyze the impact of dif ferent physical processes on the movement of Morakot （2009）. The results reveal that although diabatic heating mainly plays a role in maintaining the vertical structure of Morakot, its non-steering effect is important to the short term oscillations of the movement of Morakot.