广东省11月2次秋季暴雨过程的对比分析

2011年11月上旬末和中旬末广东省出现了2次秋季暴雨天气过程,2次暴雨过程发生在相似的天气形势下,但暴雨的范围和强度不同。利用广东省遥测站资料,常规高空、地面资料以及NCEP 1°×1°再分析资料,对2011年11月广东省2次秋季暴雨天气过程的环流背景、水汽条件、热力和动力学特征等进行对比分,结果发现：暴雨的发生、维持和消失主要与大陆冷高压、南海低值系统密切相关,物理量的空间分布与暴雨落区有很好对应关系。

Comparative Analysis on Two Autumn Heavy Rain Processes in November in Guangdong Province

There were two autumn heavy rain processes happening in early- and mid-November 2011 in Guangdong,which had similar weather conditions and different coverage and intensity. Based on the NCEP10 × 10 reanalysis datasets,precipitation data of telemetering stations,conventional upper-level and surface observation data of the province,the circulation,vapor conditions,thermal and dynamic features of the two heavy rain processes have been analyzed and compared. It is founded that the formation,development,maintenance and decaying of the two heavy rain events are closely related with a continental cold high,a depression in South China Sea and a tropical cloud cluster. Furthermore,the distribution of physical quantities corresponds well with the precipitation area.