[1]覃皓,农孟松,赖珍权,等.2020年“1·24”广西大范围冰雹天气过程分析[J].气象研究与应用,2021,42(01):107-112.[doi:10.19849/j.cnki.CN45-1356/P.2021.1.19]
　Qin Hao,Nong Mengsong,Lai Zhenquan,et al.Analysis of large scale hail weather process in Guangxi on January 24, 2020[J].Journal of Meteorological Research and Application,2021,42(01):107-112.[doi:10.19849/j.cnki.CN45-1356/P.2021.1.19]
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2020年“1·24”广西大范围冰雹天气过程分析()
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气象研究与应用[ISSN:1673-8411/CN:45-1356/P]

卷:
第42卷
期数:
2021年01期
页码:
107-112
栏目:
技术总结
出版日期:
2021-03-31

文章信息/Info

Title:
Analysis of large scale hail weather process in Guangxi on January 24, 2020
作者:
覃皓;  农孟松;  赖珍权;  翟丽萍
广西壮族自治区气象台, 南宁 530022
Author(s):
Qin Hao;  Nong Mengsong;  Lai Zhenquan;  Zhai Liping
Guangxi Meteorological Observatory, Nanning Guangxi 530022
关键词:
冰雹; 不稳定层结; 垂直风切变; 边界层辐合线; 雷达回波特征
Keywords:
hail; unstable stratification; vertical wind shear; boundary layer convergence line; radar echo characteristics
分类号:
P458.1+21.2
DOI:
10.19849/j.cnki.CN45-1356/P.2021.1.19
摘要:
2020年1月24-25日，广西出现近20年来范围最大的一次冰雹天气过程。利用常规观测资料、雷达、卫星以及再分析资料，对此次天气过程进行分析和诊断。结果表明：（1）500hPa宽槽、高空急流、低层切变、地面冷锋以及辐合线相配合提供有利环流背景，异常偏冷的中层导致大温度直减率，大气不稳定增强；（2）深层强垂直风切变、热力不稳定层结以及适宜的0℃、-20℃层高度为冰雹产生提供适宜的热动力条件；（3）对流云团呈“长椭圆”型，具有造成区域性冰雹天气的典型特征，雷达回波图上的回波悬垂结构、超过60dBz的强反射率因子、VIL跃增、持久深厚中气旋以及高层辐散低层辐合等特征，对于冰雹天气的识别和预警具有指示意义。
Abstract:
From January 24 to 25, 2020, the largest hail event in recent 20 years occurred in Guangxi. The paper used conventional observation data, radar, satellite and reanalysis data to analyze and diagnose the weather process. The results showed that(1) the combination of 500 hPa wide trough, upper level jet, lower level shear, surface cold front and convergence line provided favorable circulation background, and the abnormally cold middle layer led to large temperature drop rate, enhancing atmospheric instability.(2) Deep strong vertical wind shear, thermal instability stratification and suitable layer height of 0℃ and -20℃ provided suitable thermal dynamic conditions for hail generation.(3) The convective cloud cluster was a long ellipse type, which had the typical characteristics of regional hail weather. In addition, the characteristics of echo drape structure, strong reflectivity factor over 60 dbz, VIL jump, persistent deep mesocyclone, upper divergence and lower convergence on the radar echo map had indicative significances for hail weather identification and early warning.

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备注/Memo

备注/Memo:
收稿日期:2020-09-02。
基金项目:广西自然科学基金项目（2018GXNSFBA281178）、中国气象局预报员专项（CMAYBY2019-084）
作者简介:覃皓(1991-),男,广西南宁人,助理工程师,主要从灾害性天气及平对流层相互作用研究。E-mail:289055112@qq.com
通讯作者:农孟松,主要从事灾害性天气预报和研究工作。E-mail:nmsong1997@163.com
更新日期/Last Update: 1900-01-01