热带风暴“海高斯”诱发清远市暴雨过程分析

对0817号热带风暴"海高斯"造成的暴雨进行了天气动力学诊断分析。结果表明,热带气旋右侧生成的低空急流,将低层高能暖湿空气向暴雨区不断地输送,加上低层辐合,为此次暴雨的产生提供了充沛的水汽输送和层结不稳定条件。同时,来自中纬度西风槽后部的弱冷空气,在对流层低层与暖湿空气相互作用,对暖湿空气具有明显的抬升作用,促使了热带低压的对流发展和暴雨的产生。

Analysis on the Torrential Rain Event in Qingyuan City related to Tropical Storm Higos

Dynamical analysis of the torrential rain event related to tropical storm Higos is conducted in this paper. Re- sults show that the low level jet stream in the right flank of tropical storm supplying the warm and moist air towards the torrential rain areas, together with the low level convergence, provided the moist and instability conditions favorable for rainstorm. Weak cold air mass brought by the mid-latitude westerly trough, collided against the moist warm air, and the lifting effect helped en- hance the evolution of convection and rainstorm associated with tropical depression.