基于最新加密观测资料的乌江流域强降雨天气特征分析  

Analysis of the Strong Rainfall Weather Characteristics in Wujiang River Based on the Latest Observation Data

作　　者：吉廷艳 胡跃文[2] 夏晓玲 秦杰 

机构地区：[1]贵州省气象服务中心,贵州贵阳550002 [2]贵州省气象信息中心,贵州贵阳550002 [3]贵阳市息烽县气象局,贵州息烽551100

出　　处：《安徽农业科学》2014年第32期11415-11419,共5页Journal of Anhui Agricultural Sciences

基　　金：公益性行业(气象)科研专项(GYHY201306059)

摘　　要：利用贵州最新加密气象观测站逐日降水资料、高空天气图、红外云图等资料,分析了贵州境内乌江流域强降雨天气特征.结果表明,乌江流域降雨云团的生成发展绝大多数均是在下午至夜间出现的;最强降雨出现在夜间的机率最大,达89％,尤其是后半夜更易出现强降雨;乌江上游的三岔河流域及下游的沿河县附近乡镇是暴雨多发的区域,年暴雨日达4～6 d;流域有2个大雨中心,分别位于上游的三岔河流域和下游的思林到沙沱流域,年大雨日数达9～13d;造成乌江流域强降雨天气的影响系统主要是西南低涡东移、川东或川南切变系统东南移、台风倒槽、中低空气流辐合系统、副高南侧的东风波系统,其中,西南低涡是最主要的影响系统,所占比例达61％,其次是川东或川南切变系统,占25％.According to the latest Guizhou encryption meteorological observation station daily precipitation data,high altitude weather map and satellite infrared data,the characteristics of strong rainfall weather in Wujiang River basin of Guizhou Province was analyzed.The results showed that：the formation and development of Wujiang River basin rain clouds are most in the afternoon to night; strong rainfall maximum probability in the night,acounting to 89％,especially after midnight is more easy to appear heavy rainfall.The Sanchahe Basin upper reaches and the villages near the Yanhe downstream of the Wujiang River basin is the region where the more rainstorm occurred in,the average annual torrential rain days up to 4-6 days.The basin has two heavy rain center,located in the upstream of the Sanchahe Basin and downstream Silin to Shatuo Basin,the average annual heavy rain days up to 9-13 days.The main impact of strong rainfall weather system in Wujiang River Basin is southwest vortex moving eastward,Sichuan east or south shear system moving southeast,typhoon trough,mid-low-altitude air convergence system and easterly wave ridge south of the subtropical high.Among them,southwest vortex is the most important,the proportion of 61％,followed by.Sichuan east or south shear system,accounted for 25％.

关 键 词：乌江流域 强降雨 天气特征 影响系统 加密观测资料 

分 类 号：S161.6[农业科学—农业气象学]