摘要
使用MICAPS系统平台、地面要素资料、江西WebGIS雷达拼图和雷电数据等资料,对2012—2021年32次江西飑线过程和2017—2020年5月4次江西飑线过程进行统计和雷达回波特征分析,结果表明:(1)3—5月是飑线天气过程高发期(占全年90%),回波形态表现为飑线回波带上超级单体、飑线回波带上强单体、短带回波、超级单体(群)4种类型。江西飑线主要产生≥17.2 m/s的雷暴大风、暴雨和强雷电天气,但有59%的飑线伴有冰雹出现。(2)2017—2020年5月4次江西飑线过程,出现≥17.2 m/s雷暴大风和≥50.0 mm的暴雨或大暴雨以及冰雹天气;飑线过程单点最大风速达到37.1 m/s,单点最大日降水量206.9 mm。(3)初始阶段的A回波带和B雷暴回波群的合并,是发展形成飑线的关键;回波带某段向前突出形成的"弓状"回波带结构,是江西飑线回波带强盛阶段的经典形态;飑线回波带上常伴有超级单体和强单体回波出现,且雷电分布密集,最大回波CR强度>60 dBZ。
In order to do a good job in the monitoring, early warning and service of squall line weather in Jiangxi Province, the MICAPS system platform, surface observation, Jiangxi WebGIS concatenation of radar echo images and lightning data were used for squall line statistics and radar echo characteristics analysis of 32 squall line processes in Jiangxi from 2012 to 2021 and four squall line processes in Jiangxi from 2017 to May 2020, The results show that:(1) the high incidence period of the squall line weather process was from March to May(accounting for 90% of the whole year). The echo forms are: Super monomer on squall line echo belt, strong monomer on squall line echo belt,short band echo and super monomer(Group). Squall lines in Jiangxi mainly produce thunderstorm,gale, rainstorm and strong lightning weather ≥ 17.2 m/s, but 59% of the squall lines are accompanied by hail.(2) From 2017 to May 2020, there were squall line processes in Jiangxi, with thunderstorms and gale ≥ 17.2 m/s, rainstorm or heavy rainstorm ≥ 50.0 mm and hail;During the squall line process, the maximum wind speed at a single point reaches 37.1 m/s( J6019, Heshi, Jinxi County,Fuzhou City), and the daily maximum precipitation reached 206.9 mm( J5059, Shanggao Zhendu meteorological observation station, Shanggao County, Yichun City).(3) The combination of A echo band and B thunderstorm echo group in the initial stage was the key to the development and formation of squall line;The “bow”echo zone structure formed by a section of the echo zone protruding forward is a classic form in the strong stage of the squall line echo zone in Jiangxi Province;The squall line echo band is often accompanied by super monomer and strong monomer echoes, with dense lightning distribution, and the maximum echo CR intensity reaches more than 60 dBZ. These results provide a reference for the monitoring, early warning and classification of squall line weather in Jiangxi Province.
作者
段和平
马中元
谌芸
陈鲍发
黄中根
周晓香
周洁晨
计桂平
DUAN Heping;MA Zhongyuan;CHEN Yun;CHEN Baofa;HUANG Zhonggen;ZHOU Xiaoxiang;ZHOU Jiechen;JI Guiping(Meteorological Disaster Technology Center of Jiangxi Province,Nanchang 330046,China;Jiangxi Institute of Meteorological Sciences,Nanchang 330046,China;National Meteorological Center,Beijing 100081,China;Jingdezhen Meteorological Bureau,Jingdezhen 333000,China;Jiujiang Meteorological Bureau,Jiuiang 33200,China;Jiangxi Meteorological Information Center,Nanchang 330095,China)
出处
《沙漠与绿洲气象》
2021年第6期75-82,共8页
Desert and Oasis Meteorology
基金
国家自然科学基金面上项目(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)
江苏省气象局北极阁开放研究基金(BJG201205)
江西省气象局2020年面上项目(JX2020M05)。
关键词
江西飑线
天气系统
飑线回波特征
Jiangxi squall line
weather system
squall line echo characteristics
