| 2019年广西临桂微下击暴流和广东湛江龙卷现场灾情调查对比分析 |
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| 引用本文： | 蔡康龙,俞小鼎,李彩玲,黄先香,炎利军,何秋蕊,麦文强,陈志芳.2019年广西临桂微下击暴流和广东湛江龙卷现场灾情调查对比分析[J].气象,2021(2):230-241. |
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| 作者姓名： | 蔡康龙 俞小鼎 李彩玲 黄先香 炎利军 何秋蕊 麦文强 陈志芳 |
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| 作者单位： | 广东省佛山市气象局/佛山市龙卷风研究中心;中国气象科学研究院灾害天气国家重点实验室;中国气象局气象干部培训学院 |
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| 基金项目： | 广东省科技厅社会发展科技协同创新体系建设专项(2019B020208015);灾害天气国家重点实验室开放课题(2020LASW-A03,2018LASW-B18);佛山市气象局科技项目(201906)共同资助。 |
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| 摘 要： | 2019年3月21日21:13广西桂林市临桂区国家气象观测站测得60.3 m·s-1的瞬时极大风速,2019年4月13日14:11广东湛江市徐闻县下属和安镇镇政府自动气象站测得50.7 m·s-1的瞬时极大风速,两地均出现比较明显的风灾。通过分析监控视频、无人机航拍资料、现场勘察和走访目击者,获得如下结论:21:09—21:14临桂国家气象观测站及周边区域的风灾过程是一次EF2级微下击暴流,时间尺度大于6 min,空间尺度约为1.6 km×2.0 km,属于α小尺度(400~4000 m)微下击暴流,其中包含7个β小尺度(40~400 m)微下击暴流;灾害现场呈现出受灾区域的纵横比小、灾情不连续和树木倒向有明显辐散的特征。14:09—14:15广东湛江徐闻的风灾过程是一次EF3级的强龙卷,持续时间约为7 min,龙卷路径长约为3.2km,宽约为30~280 m,监控视频显示在龙卷发生地附近出现了持续时间极短的旋转性大风。相对于临桂微下击暴流,龙卷灾害现场具有风灾破坏带纵横比大、灾情连续和多处树木倒向呈现辐合的特征。
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| 关 键 词： | 微下击暴流 龙卷 现场调查 灾害特征 |
Comparative Analysis of Damage Survey of Microburst in Lingui of Guangxi and Tornado in Zhanjiang of Guangdong in 2019 |
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| CAI Kanglong,YU Xiaoding,LI Cailing,HUANG Xianxiang,YAN Lijun,HE Qiurui,MAI Wenqiang,CHEN Zhifang.Comparative Analysis of Damage Survey of Microburst in Lingui of Guangxi and Tornado in Zhanjiang of Guangdong in 2019[J].Meteorological Monthly,2021(2):230-241. |
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| Authors: | CAI Kanglong YU Xiaoding LI Cailing HUANG Xianxiang YAN Lijun HE Qiurui MAI Wenqiang CHEN Zhifang |
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| Institution: | (Foshan Tornado Research Centre/Foshan Meteorological Office of Guangdong Province,Foshan 528315;State Key Laboratory of Severe Weather,Chinese Academy of Meteorological Sciences,Beijing 100081;China Meteorological Administration Training Centre,Beijing 100081) |
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| Abstract: | On 21 March 2019,an instantaneous maximum wind speed of 60.3 m·s-1was recorded at 21:13 BT by national observation station in Lingui District,Guangxi.On 13 April 2019,an instantaneous maximum wind speed of 50.7 m·s-1was recorded at 14:11 BT by observation station in He’an Town,Guangdong Province.Significant wind damages were observed at the two places.By analyzing surveillance video,drone aerial data,site survey and visiting witnesses,the following conclusions were obtained.The wind damage which occurred at Lingui National Station and its surrounding area from 21:09 BT to 21:14 BT was a EF2 microburst lasting at least 6 minutes and affecting 1.6 km×2.0 km.It belonged to micro-αscale microburst and contained seven micro-βscale embedded.The damage area was featured with small aspect ratio,discontinuous spatial distribution and divergent wind pattern.The wind damage that occurred in Xuwen of Guangdong Province from 14:09 BT to 14:15 BT was a EF3 tornado which lasted for 7 minutes.The damage path was about 3.2 km long and 30-280 m wide.The surveillance video showed that there was a rotational wind tunnel existing shortly near the damage site.Compared with Lingui microburst,the damage area has larger aspect ratio,more continuous spatial distribution and convergent wind pattern. |
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| Keywords: | microburst tornado damage survey damage characteristic |
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