大气科学学报2011，Vol.34Issue(6)：708-716,9.
一次南支槽背景下地形对贵州水城南部特大暴雨的作用
The effect of topography on heavy torrential rain in the background of a south branch trough in Shuicheng of Guizhou Province
摘要
Abstract
By using ECWMF（European Centre for Medium-Range Weather Forecasts） analysis data,conventional observations,FY-2C satellites,radar stations and automatic weather station data,the heavy rain occurred on the night of 28 June 2009 in Fa＇er Village,Shuicheng County in Guizhou Province is analyzed.The results show that the occurrence of the heavy rain on 28 June 2009 in Fa＇er Village,Shuicheng County of Guizhou Province was the result of the southern branch trough,low shear and strong southwest warm air.Area of strong precipitation was in accord with middle-γ scale cloud.The movement,mergence,development,stagnation and decline of the clouds can well indicate the rainfall area and intensity.The strong convective echoes monomer resulted from the low-level convergence zone lingered around the Wumeng mountains（highest peak 2 901 m） to northwest of Shuicheng County,which merged the rain clouds to the south of the county and thus caused the heavy torrential rain.The air flow field near Fa＇er was changed because of its special terrain.It did not only strengthen and maintain terrain vertical velocity but also included more water vapor into the clouds and thus prolonged the duration time of the rainstorm cloud above Fa＇er.The trumpet shape of the terrain also strengthened the convergence upward movement.The regional AWS data shows that the small and medium-scale weather system exerted important influence on the rain in Fa＇er Village and nearby areas.It is also significant for the short-term forecast of this heavy torrential rain.关键词
南支槽/特大暴雨/地形/水城南部Key words
southern branch trough/heavy torrential rain/terrain/southern shuicheng分类
天文与地球科学引用本文复制引用
池再香,邱斌,康学良,吴华洪..一次南支槽背景下地形对贵州水城南部特大暴雨的作用[J].大气科学学报,2011,34(6):708-716,9.基金项目
六盘水市科技局社会攻关项目 （）
