[1]冼星河,张玮,陈楚梦.新型观测数据在东莞一次大暴雨过程中的综合应用[J].气象研究与应用,2021,42(02):63-67.[doi:10.19849/j.cnki.CN45-1356/P.2021.2.12]
　Xian Xinghe,Zhang Wei,Chen Chumeng.Comprehensive application of new observation data in a heavy rainstorm in Dongguan[J].Journal of Meteorological Research and Application,2021,42(02):63-67.[doi:10.19849/j.cnki.CN45-1356/P.2021.2.12]
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新型观测数据在东莞一次大暴雨过程中的综合应用()
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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02期
页码:
63-67
栏目:
新技术应用
出版日期:
2021-07-06

文章信息/Info

Title:
Comprehensive application of new observation data in a heavy rainstorm in Dongguan
作者:
冼星河;  张玮;  陈楚梦
广东省东莞市气象局, 广东 东莞 523000
Author(s):
Xian Xinghe;  Zhang Wei;  Chen Chumeng
Dongguan Meteorological Bureau, Dongguan Guangdong 523000
关键词:
大暴雨; 风廓线雷达; 微波辐射计; 地面中尺度
Keywords:
rainstorm; wind profiler radar; microwave radiometer; surface mesoscale
分类号:
P458.1+21.1
DOI:
10.19849/j.cnki.CN45-1356/P.2021.2.12
摘要:
利用区域自动站、风廓线雷达及微波辐射计资料，对东莞市2019年 6月一次大暴雨作综合分析。结果表明：大暴雨发生在前期高温、高层强辐散形势中，低层有西南风急流，水汽充沛，利于出现强降水，低层浅薄冷空气入侵激发前期不稳定能量，强对流出现；弱冷空气触发的降水，雷雨的偏北出流与西南风对峙形成中尺度辐合线，增城降水造成的冷池驱动导致东莞的第一波降水，飑线与地面辐合线合并，冷暖平流对峙激烈，使强降雨维持；850hPa低空急流在强降水前2h最强，925hPa风速则在2h前增大，数值跃升时，强降水出现；低层垂直风切变在强降雨前2h最强，对强降雨的发生有指示作用；微波辐射计的综合水汽含量仅对首次降雨有指示作用，提前20min的数值增长具有参考性；CAPE值对强对流的发生敏感。
Abstract:
Based on the data of regional automatic weather station, wind profiler radar and microwave radiometer, a heavy rain in Dongguan in June 2019 was analyzed. The results showed that the rainstorm occurred in the situation of high temperature and strong divergence in the early stage, there was the southwest wind jet in the low level with abundant water vapor, which was conducive to the occurrence of heavy rainfall. The invasion of shallow cold air in the low level stimulated the early unstable energy, and the strong convection occurred. Weak cold air triggered precipitation, the northerly outflow of thunderstorm and southwest wind formed a mesoscale convergence line, and the cold pool caused by precipitation in Zengcheng led to the first wave of precipitation in Dongguan. The squall line merged with the surface convergence line, and the cold and warm advection was intense, which made the heavy rainfall maintain. The 850hPa low-level jet was the strongest 2 hours before the heavy rainfall, and the 925hPa wind speed increased 2 hours before the heavy rainfall. When the value jumped,the heavy rainfall appeared. The low-level vertical wind shear was the strongest 2 hours before the heavy rainfall,which can indicate the occurrence of heavy rainfall. The integrated water vapor content of microwave radiometer could only indicate the first rainfall, and the numerical growth 20 minutes ahead of time had reference value. The Cape value was sensitive to the occurrence of strong convection.

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备注/Memo

备注/Memo:
收稿日期:2020-06-28。
基金项目:东莞市气象局科研项目"东莞两次大暴雨过程新型探测资料特征"
作者简介:冼星河(1991-),本科,工程师。E-mail:596047503@qq.com
更新日期/Last Update: 1900-01-01