安徽农业科学2016，Vol.44Issue(17)：202-204,216,4.
“7．21”北京特大暴雨个例分析Ⅱ：动力条件分析
Analysis of a Torrential Rain Occurring in Beijing on 21 July 2012 II：Dynamics Analysis
摘要
Abstract
FNL (Final the Operational Global Analysis) data, TBB (Black Body Temperature) data, and sounding data in Beijing station were used to analyze the vertical movement condition, unstable condition and TBB image feature of a torrential rain occurring in Beijing on 21 July 2012.The results showed that upward movement prevailed in the whole troposphere.The vertical velocity increased on July 21 in Beijing area. The vertical velocity was the strongest from 18:00 to 21:00 when the precipitation intensity was the greatest .The biggest vertical velocity was -3 Pa/s.Before torrential rain occurred, many convective environment parameters including CAPE value and surface uplift index all reached the index of torrential rain, and had relatively good indicative significance for heavy rain forecast.TBB data were used to analyze the mesoscale sys-tem, indicating that the developing mesoscale convective system was set in the cloud of trough in the beginning .TBB evolutional trend had very good corresponding relationship with precipitation, so TBB was the good indicator of the rainstorm.关键词
暴雨/垂直运动/不稳定条件/云顶亮温Key words
Rainstorm/Vertical movement/Unstable condition/TBB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Ⅱ：动力条件分析[J].安徽农业科学,2016,44(17):202-204,216,4.基金项目
国家自然科学基金项目（41175054）。 （）
