2018年5月20日局地冰雹回波特征分析  

Analysis of Local Hail Echo Characteristics on May 20,2018

作　　者：彭莎 马中元[2] 陈鲍发 张萍 桂园园 PENG Sha;MA Zhongyuan;CHEN Baofa;ZHANG Ping;GUI Yuanyuan(Yingtan Meteorolofical Bureau,335000,Yingtan,Jiangxi,PRC;Jiangxi Institute of Meteorolofical Sciences,330046,Nanchang,PRC;Jingdezhen Meteorolofical Bureau,333000,Jingdezhen,Jiangxi,PRC)

机构地区：[1]鹰潭市气象局,江西鹰潭335000 [2]江西省气象科学研究所,南昌330046 [3]景德镇市气象局,江西景德镇333000

出　　处：《江西科学》2020年第6期877-880,939,共5页Jiangxi Science

基　　金：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(BJG201205);江西省重点研发计划项目(20171BBG7005);景德镇市科技计划项目(2017NYSF002)。

摘　　要：使用micaps常规资料和江西Web GIS雷达拼图平台上的雷达回波资料,分析了2018年5月20日强天气过程,结果发现:日照增温为此次过程提供了极好的热力条件,中低层水汽也充沛,大气层结处于极不稳定状态,风垂直切变逐渐增强,在低槽、切变线、地面倒槽等动力抬升作用下出现了强对流天气。冰雹出现大部由小块单体迅速发展导致,表现为强度迅速增强,范围呈指数级扩大。当回波强度达60~65 d Bz,且60~65 d Bz范围达到10 km×10 km附近,且有65~70 d Bz的紫色强回波核时,冰雹降落。60~65 d Bz强回波范围越大,中心紫色强回波核占强回波比例越高,强风雹维持时间越长。The strong weather process on May 20,2018 was analyzed by using micaps conventional data and radar echo data from Jiangxi WebGIS radar jigsaw puzzle platform.The results showed that the warming of sunshine provided excellent thermal conditions for the process,with abundant water vapor in the middle and lower layers,extremely unstable atmospheric stratification,increasing vertical wind shear,and strong convective weather appeared under the dynamic uplift of low trough,shear line and inverted trough on the ground.Hail is mostly caused by the rapid development of small monomer,which shows that the intensity increases rapidly and the range expands exponentially.When the echo intensity reaches 60 ~ 65 d Bz,and the range of 60 ~ 65 d Bz reaches 10 km × 10 km,and there is a strong purple echo core of 65 ~ 70 d Bz,the hail falls.The larger the range of 60 ~ 65 d Bz strong echo,the higher the proportion of central purple strong echo nucleus in strong echo,and the longer the duration of strong wind and hail.

关 键 词：中分析 T-log P&V-3θ 局地冰雹回波特征 

分 类 号：P458[天文地球—大气科学及气象学]