8515号台风路径分析

本文讨论了环境流场、流函数切变平流、势函数的垂直配置与8515号台风路径的关系,并用台风移向变率诊断方程分析与计算了该台风移动时移向变化的情况,特别是9月5日发生的明显右偏。分析结果如下:1.西太平洋副热带高压呈块状,赤道缓冲带增强,有利于8515号台风移向右偏。2.8515号台风处于负流函数切变平流区一侧,其路径与流函数切变平流零线走向基本一致。3.8515号台风北侧各层势函数场的垂直分布,决定了辐散风的配置,其演变与台风移向有一定的相关。4.台风移向变率诊断的定性分析和实用计算,对判别台风移向是否稳定有一定参考意义。 

A CASE STUDY OF TYPHOON TESS'S TRACK

In this paper, the relationship betweeh Tess's track and the surrounding field, stream function and potential function is discussed, and also the change of typhoon Tess's track is analysed and calculated using the diagnosis equation for the motion of typhoon, which is deduced by authors in another paper. Particularly, the reasons for typhoon Tess's track to right-bent at OOOOZ 5 September are given a full account The result shows that it is helpful to use the diagnosis equation for the motion of typhoon during analysis and forecast.