[1]何珊珊,梁依玲,农孟松.一次东风波背景下的局地强降雨过程分析[J].气象研究与应用,2020,41(02):63-67.[doi:10.19849/j.cnki.CN45-1356/P.2020.2.13]
　He Shanshan,Liang Yiling,Nong Mengsong.Analysis on a heavy rainfall process under the background of an easterly wave[J].Journal of Meteorological Research and Application,2020,41(02):63-67.[doi:10.19849/j.cnki.CN45-1356/P.2020.2.13]
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一次东风波背景下的局地强降雨过程分析()
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气象研究与应用[ISSN:1673-8411/CN:45-1356/P]

卷:
第41卷
期数:
2020年02期
页码:
63-67
栏目:
技术总结
出版日期:
2020-06-30

文章信息/Info

Title:
Analysis on a heavy rainfall process under the background of an easterly wave
作者:
何珊珊;  梁依玲;  农孟松
广西壮族自治区气象台, 南宁 530022
Author(s):
He Shanshan;  Liang Yiling;  Nong Mengsong
Guangxi Meteorological Observatory, Nanning 530022
关键词:
东风波; 暴雨; 低涡; 黔桂地区
Keywords:
easterly wave; heavy rainfall; low vortex; Guangxi and Guizhou region
分类号:
P458.3
DOI:
10.19849/j.cnki.CN45-1356/P.2020.2.13
摘要:
2018年8月5-9日，活动在我国南方的东风波系统强度强、西行可深入至四川盆地，造成了7-8日贵州西南部到广西西北部的暴雨到大暴雨天气。利用常规观测资料、NCEP的1°×1°再分析资料、区域自动站资料、FY2G相当黑体亮温和雷达资料，对东风波的活动及局地强降雨成因进行分析。结果表明：①本次过程的影响系统为单纯性的东风扰动，该扰动强度强、垂直发展深厚、水平呈低涡型式；②中低层波轴附近及其西侧的低层辐合及上升运动、深厚的暖湿层、低的自由对流高度，为强降雨的发生和持续发展提供有利动热力和水汽条件；③出现在中层低涡底部及其南侧的东、西暴雨团具有不同的降雨特点，中尺度辐合加强、中γ尺度急流脉动分别起着更重要的作用。
Abstract:
Using conventional observation data, NCEP 1 °×1 ° reanalysis data, regional automatic station data, FY2G equivalent blackbody brightness and temperature radar data, the causes of the South China easterly wave activity and local heavy rainfall on August 5-9, 2018 were analyzed. The results showed that(1)the influence system of rainstorm weather process from Southwest Guizhou to Northwest Guangxi on August 7-8 was a simple east wind disturbance, which had a strong intensity, deep vertical development and low horizontal vortex pattern.(2)The convergence and ascending motion of the lower layer near the wave axis of the middle and lower layer and its west side, the deep warm and humid layer and the low free convection height provided favorable dynamic, thermal and water vapor conditions for the occurrence and sustainable development of heavy rainfall. (3)The rainfall area was located at the middle-level vortex bottom and its south side. The characteristics and causes of rainfall were different. Mesoscale convergence and meso-γ scale jet fluctuation played more important roles respectively

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期:2020-05-20。
基金项目:广西壮族自治区气象局气象科研计划项目（桂气科2019M06、2017Z02）
作者简介:何珊珊,(1989-),女,广西大新人,主要从事灾害性天气预报服务及相关研究。E-mail:heshans12@126.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