一次季风潮爆发引致的区域性大暴雨过程分析

利用气象观测资料、卫星云图、雷达图以及其它物理量等,对2012年6月21至23日区域性暴雨天气过程进行分析,得出如下结论：这次暴雨过程发生在热带气旋东北移及南海季风槽北抬的背景下,沿海西南急流是这次大暴雨的直接影响系统;这次过程水汽主要来源是南海,降水主要发生在水汽通量大值中心的右边及右前方,本次大暴雨降水强弱与水汽通量、急流及地形等有极为吻合的对应关系.

A Case Study on Regional Torrential Rain Caused by a Monsoon Outbreak

Based on conventional meteorological observations, satellite images, radar images and other physical quantities, a regional torrential rain event during June 21-23, 2012 was analyzed. The major results showed that： this torrential rain event developed in an environment of a moving northeasterly TC, the South China Sea （SCS） monsoons surging northward. A coastal southwesterly low-level flow was the key contributing system. Torrential rains occurred in the right and the right front side of the maximum center of water vapor flux. The precipitation intensity was in good correspondence with the water vapor flux, low-level jet and terrains.