[1]屈梅芳,古明悦.不同天气系统影响下阵风锋的对比分析[J].气象研究与应用,2016,37(02):20-24.
　Qu Mei-fang,Gu Ming-yue.Comparative analysis of gust front under the influence of different weather systems[J].Journal of Meteorological Research and Application,2016,37(02):20-24.
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不同天气系统影响下阵风锋的对比分析()
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气象研究与应用[ISSN:1673-8411/CN:45-1356/P]

卷:
第37卷
期数:
2016年02期
页码:
20-24
栏目:
天气气候
出版日期:
2016-12-21

文章信息/Info

Title:
Comparative analysis of gust front under the influence of different weather systems
作者:
屈梅芳1;  古明悦2
1. 广西区气象台, 广西南宁 530022;
2. 南宁市气象局, 广西南宁 530022
Author(s):
Qu Mei-fang1;  Gu Ming-yue2
1. Guangxi Meteorological Observatory, Nanning Guangxi 530022;
2. Nanning Municipal Meteorological Service, Nanning Guangxi 530022
关键词:
阵风锋; 雷暴大风; 窄带回波
Keywords:
gust front; thunderstorm gale; narrow-band echo
分类号:
P458
摘要:
利用常规观测资料、多普勒天气雷达资料和地面加密观测数据,对2014年6月8~9日发生在南宁的两次阵风锋天气进行分析。得到以下结论:阵风锋回波强度为10-20dBZ,水平尺度20km,呈弧状,成熟时高度大概1.5km,阵风锋只是对流层低层的浅薄系统。阵风锋移动速度与母体雷暴移动速度的关系对雷暴的发展与减弱有很好的指示作用。阵风锋前沿有明显的风速辐合,可以触发新的对流单体的生成。两条阵风锋的相遇合并会使得阵风锋加强,更易触发新的对流单体产生。阵风锋愈强,其过境时所引起的风速增大的现象就愈明显。单体质心的快速下降和反射率因子核心的快速下降对地面雷暴大风有很好的指示作用,约可提前半小时预警。
Abstract:
Based on conventional observation data, Doppler weather radar data and ground observation data, two gust front weather processes during 8 to 9, June, 2014 in Nanning were analyzed. The results show that:gust front is just shallow system in the lower troposphere with 10 to 20 DBZ echo intensity, 20 km horizontal scale, arc shape and 1.5 km height when matured. The instructions of relationships between gust front moving speed and maternal thunderstorms moving speed performed well for the developing and weakening of thunderstorm. Obvious wind speed convergence in front of gust front triggers the generation of new convection cell. Furthermore, the new convection cell is more likely generated by stronger gust front, which was combined by two gust fronts trigger. The stronger gust front caused the more increase of wind speed. The rapid decline of monomer mass center and reflectivity core could be used for the halfhour early warning of the ground thunderstorm wind.

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备注/Memo

备注/Memo:
收稿日期:2015-11-25。
作者简介:屈梅芳(1989-),女,本科,助工,主要从事短时临近预报预警研究工作。
更新日期/Last Update: 1900-01-01