J4 ›› 2011, Vol. 29 ›› Issue (2): 218-223.

• 论文 • 上一篇    下一篇

湖南一次飑线过程的多普勒雷达回波特征

陈德桥1 ,刘应军2 ,唐明晖2 ,丁小剑2   

  1. 1. 湖南省衡阳市气象局,湖南衡阳421001; 2. 湖南省气象台,湖南长沙410007
  • 收稿日期:2010-12-22 修回日期:2011-04-08 出版日期:2011-06-30 发布日期:2011-06-30
  • 作者简介:陈德桥( 1967 - ) ,男,湖南省衡阳市人,工程师,主要从事短期天气预报分析与应用工作. E - mail: cdq872@163. com
  • 基金资助:


    湖南省气象局重点项目,高分辨率数值预报产品释用技术研究( 200602) 资助

Analysis of Echo Characteristic of a Strong Squall Line Process Based on Dopplor Weather Radar

CHEN Deqiao1,LIU Yingjun2,TANG Minghui2,DING Xiaojian2   

  1.  1. Hengyang Meteorological Bureau of Hu’nan Province,Hengyang 4210001,China;
    2. Meteorological Observatory of Hu’nan Province,Changsha 410007,China.
  • Received:2010-12-22 Revised:2011-04-08 Online:2011-06-30 Published:2011-06-30

摘要:

使用常规气象资料和长沙多普勒天气雷达产品,对2009 年3 月21 日湖南飑线天气过程进行了初步分析。结果表明此次过程发生在低层增温增湿、中低层较强垂直风切变环境场中,中层冷平流的入侵加剧了层结的不稳定性。过程中风暴单体形态特征具有典型入流缺口、弱回波区和悬垂体结构特征,风暴单体内部( 3 km 以下) 存在辐合性涡旋,VIL > 40 kg·m- 2 时,有利于产生冰雹和大风天气,降雹前垂直液态水含量( VIL) 会出现明显跃增。

关键词: 飑线, 超级单体风暴, 垂直积分液态水含量, 中气旋

Abstract:

Conventional meteorological data and Doppler weather radar products are used to analyze the strong squall line weather process occurred in Hu’nan on March 21,2009. The results show that the weather process occurred in advantageous environment field ( the warming and humid at lower atmosphere, the stronger vertical wind shear in middle and low level atmosphere) ,and the invasion of middle - level cold advection aggravated the unstable stratification.During this process the hail echo characteristics presented V - gap,the weak echo region and overhanging structure,and there was convergence in the internal of the hail cell ( below three km ) . When the VIL was above 40 kg·m- 2 ,hail and strong wind was likely to occurr. Sharp increment of VIL appeared before hail occurrence.

Key words: squall line, super hail cell, VIL, meso - cyclone

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