贵港市2001年雨季开始期主要影响系统分析

Analysis of Principle Influencing Systems in the Initial Period of Raining Season of Guigang in 2001

20 0 1年 4月 2 3- 2 5日 ,受锋面、西南低压、切变线及南支槽的共同影响 ,贵港各县市普降暴雨 ,开始进入雨季。分析得知 ,85 0 h Pa持续较长时间的西南风急流将暖湿气流源源不断地向贵港上空输送 ,与南下的冷空气交绥 ,并在桂中维持 。

The raining season of Guigang in 2001 began on April 23 25 with rainstorm in the whole region, resulted from the common action of front, shear line and south trough. The analysis of the rainstorm concluded that the jointing and lingering of continuous warm and wet airflow, which is send to the upper space of Guigang by the south west jet stream lasted for a long time at 850pa, and the cold airflow moving southwards, are the main cause of strong precipitation lasting for a long period.