“2020.07.08—10”丰城连续性大暴雨过程分析  

Analysis of Continuous Heavy Rain Process in Fengcheng on"July 8-10,2020"

作　　者：饶云花 马中元[1] 陈鲍发 程小娟 孙芳 RAO Yunhua;MA Zhongyuan;CHEN Baofa;CHENG Xiaojuan;SUN Fang(Jiangxi Institute of Meteorological Sciences,330046,Nanchang,PRC;Fengcheng Meteorological Bureau,331100,Fengcheng,Jiangxi,PRC;Jingdezhen Meteorological Bureau,333000,Jingdezhen,Jiangxi,PRC)

机构地区：[1]江西省气象科学研究所,南昌330046 [2]丰城市气象局,江西丰城331100 [3]景德镇市气象局,江西景德镇333000

出　　处：《江西科学》2022年第2期277-282,共6页Jiangxi Science

基　　金：中国科学院战略性先导科技专项(A类-XDA19040202);国家自然科学基金项目(41975001);中国气象局气象关键技术集成与应用项目(CMAGJ2013M74);中国气象科学研究院开放课题(2012LASWB01);南京雷达气象与强天气开放基金项目(BJG201205)。

摘　　要：为了更好地监测预警大暴雨天气,开展好预报服务工作,使用常规天气图、自动站数据、云图、雷达拼图和单部雷达产品等资料,采用天气学、卫星气象学和雷达气象学等方法,对2020年7月8—10日江西连续性大暴雨过程进行分析,结果表明:1)江西大暴雨与副热带高压有关,出现在副高西北部多个系统辐合之中;2)絮状回波带和絮状回波团静止少动,带上不断有回波短带和单体回波发展加强,形成“列车效应”,形成大暴雨天气;同等回波强度时,絮状回波团的降水效率要高于絮状回波带;3)丰城市受絮状回波带影响,回波强度35~50 d BZ;RCS上,35~50 d BZ回波顶高在6 km以下;VCS上,7~8 km以下均为负速度,对应强回波位置负速度区中出现-10 m/s大值区;4)组合反射率CR回波强度与地面1 h雨量呈正相关,回波越强雨量越大;但雨量出现时间落后于CR回波。研究成果对江西大暴雨天气的监测预警和预报服务有指导意义。In order to better monitor and warn the heavy rainstorm weather and carry out good prediction and service,the continuous heavy rainstorm process in Jiangxi from July 8 to 10,2020 is analyzed by using conventional weather map,automatic station data,cloud map,radar puzzle and single radar product,and using the methods of meteorology,satellite meteorology and radar meteorology.The results show that:1)The heavy rain in Jiangxi is related to the subtropical high,which occurs in the convergence of multiple systems in the northwest of the subtropical high.2)The flocculent echo band and flocculent echo cluster are static and less dynamic,and there are continuous echo short bands and single echo development and strengthening on the band,forming"train effect"and heavy rainstorm weather;At the same echo intensity,the precipitation efficiency of flocculent echo group is higher than that of flocculent echo band.3)Fengcheng city is affected by the flocculent echo band,and the echo intensity is 35~50 dBZ;On RCS,the top height of 35~50 dBZ echo is less than 6 km;On the VCS,the negative velocity is below 7~8 km,and there is a large value area of-10 m/s in the negative velocity area corresponding to the strong echo position.4)The echo intensity of combined reflectance CR is positively correlated with ground 1-hour rainfall.The stronger the echo is,the greater the rainfall is;However,the occurrence time of rainfall lags behind that of CR echo.The research results have guiding significance for the monitoring,early warning and prediction service of heavy rainstorm in Jiangxi province.

关 键 词：大暴雨 概念模型 云图特征 回波特征 

分 类 号：P458.121.1[天文地球—大气科学及气象学]