###
DOI:
本文二维码信息
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
蔡康龙1, 俞小鼎2, 李彩玲1, 黄先香1, 炎利军3
(1.佛山市龙卷风研究中心;2.中国气象局气象干部培训学院;3.佛山市气象局/佛山市龙卷风研究中心)
Comparative Analysis of Survey for Microburst in Lingui, Guangxi and Tornado in Zhanjiang, Guangdong in 2019
Kanglong Cai1, Xiaoding Yu2, Cailing Li1, Xianxiang Huang1, yan lijun3
(1.Foshan Tornado Research Center;2.China Meteorological Administration Training Center;3.Foshan Meteorological Service/Foshan Tornado Research Center)
摘要
相似文献
本文已被:浏览 35次   下载 58
投稿时间:2019-09-06    修订日期:2020-11-23
中文摘要: 2019年3月21日21:13广西省桂林市临桂区国家气象观测站测得60.3m/s的瞬时极大风速,2019年4月13日14:11广东省湛江市徐闻县下属的和安镇镇政府气象观测站测得50.7m/s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:(1)3月21日21时08分-21时14分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,时间尺度约为7分钟,空间尺度约为1.6km×2.0km,属于α小尺度(400~4000m)微下击暴流,其中包含7个β小尺度(40~400m)微下击暴流条迹。灾害现场呈现出风灾条迹的纵横比小,灾情不连续、地面受灾指示物有明显辐散的特征;(2)4月13日14时08分-14时15分广东湛江徐闻的风灾过程是一次EF3级的强龙卷,时间尺度约为8分钟,狭窄的破坏条迹长约3.2km,宽约30-280m,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。风灾现场具有风灾条迹的纵横比大,灾情连续、多处地面灾情指示物呈现辐合的特征。
Abstract:In 21 March 2019, an instantaneous wind speed of 60.3 ms-1 was recorded at 2113 LST by national observation station in Lingui District, Guangxi Province. In 13 April 2019, an instantaneous wind speed of 50.7 ms-1 was recorded at 1411 LST by observation station in Hean Town, Guangdong Province. Significant wind damage was observed at two places. Based on surveillance video record, UAV aerial image and on-site investigation, it can be concluded as follow:(1) The wind damage occurred at Lingui national meteorological observation station and its surrounding area at 2108-2114 LST 23 March is due to a microburst at EF2 scale in time scale of 7 minutes and spatial scale of 1.6 km×2.0 km. It belongs to micro-α scale and contained seven micro-β scale swans. The damage area is featured with small aspect ratio, discontinuous spatial distribution and divergent wind pattern. (2) The wind damage occurred at 1408-1415 LST, 13 April in Xuwen, Guangdong Province was a tornado at EF3 scale in time scale of 8 minutes. The damage swath was ~3.2km long and 30-280m wide. The surveillance video showed that there was a rotational wind tunnel existed shortly near the damage site. The damage area has larger aspect ratio, continuous spatial distribution and convergent wind pattern.
文章编号:201909060330     中图分类号:    文献标志码:
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)
引用文本:
蔡康龙,俞小鼎,李彩玲,黄先香,炎利军,0.Comparative Analysis of Survey for Microburst in Lingui, Guangxi and Tornado in Zhanjiang, Guangdong in 2019[J].Meteor Mon,():-.
Kanglong Cai,Xiaoding Yu,Cailing Li,Xianxiang Huang,yan lijun,0.Comparative Analysis of Survey for Microburst in Lingui, Guangxi and Tornado in Zhanjiang, Guangdong in 2019[J].Meteor Mon,():-.