安徽农业科学2016，Vol.44Issue(13)：247-249,286,4.
“7.21”北京特大暴雨个例分析I：水汽条件分析
Analysis of a Torrential Rain Occurring in Beijing on 21 July 2012:Moisture Analysis
摘要
Abstract
Using the ground observational data, NCEP data, FNL data,etc. the large scale circulation background and moisture condition of a torrential rain occurring in Beijing during July 21-22, 2012 was analyzed. The results showed that the precipitation process can be divided in-to two phases. The first stage was from 10:00 to 20:00 on July 21,in which the precipitation was mainly from the convective system. The sec-ond stage was from 20:00 on July 21 to 04:00 on July 22,in which the precipitation was mainly from the frontal system. The main systems in-fluencing the precipitation process were trough at 500 hPa,low vortex,the ground inverted trough,a cold front. On July 21,the whole tropo-sphere in Beijing area had sufficient moisture. Moisture mainly came from water vapor transport by southeast flow and south flow outside the subtropical anticyclone and the southwest jet at low level which plays a major role in the whole process. Very strong vapor convergence center appeared in Beijing area.关键词
暴雨/环流背景/水汽条件/强对流Key words
Rainstorm/Circulation background/Moisture condition/Severe convection分类
农业科技引用本文复制引用
谭伟才,映方,李启华..“7.21”北京特大暴雨个例分析I：水汽条件分析[J].安徽农业科学,2016,44(13):247-249,286,4.基金项目
国家自然科学基金项目(41175054)。 （41175054）
