干旱气象

• 论文 • 上一篇    下一篇

湖南湘中地区一次暴雨及大暴雨过程分析

张剑明1章新平2 蔡秀峰1张庆云1   

  1. 张剑明1 ,章新平2 ,蔡秀峰1 ,张庆云1
  • 收稿日期:2012-10-17 修回日期:2012-12-28 出版日期:2013-03-30 发布日期:2013-03-01
  • 作者简介: 张剑明( 1982 - ) ,男,湖南长沙人,硕士研究生,主要从事天气与气候研究. E - mail: zhaolanxiai@ sina. com
  • 基金资助:

     国家自然科学基金( 41171035) 及湖南省“十二五重点学科”( 2011001)共同资助

Analysis of the Heavy Rainstorm Process on May 13,of 2010 in Central of Hu’nan Province

ZHANG Jianming1ZHANG Xinping2CAI Xiufeng1ZHANG Qingyun1   

  1. 1. Zhuzhou Meteorological Bureau of Hu’nan Province,Zhuzhou 411000,China;
    2. College of Resources and Environment Sciences,Hu’nan Normal University,Changsha 410081,China
  • Received:2012-10-17 Revised:2012-12-28 Online:2013-03-30 Published:2013-03-01

摘要:

利用NCEP 的1° × 1°再分析资料、FY2E 卫星云图TBB资料、雷达资料、常规天气资料以及加密自动雨量站资料,对2010 年5 月13 日湖南省湘中地区一次大暴雨天气过程的环流背景、物理量场、卫星雷达资料等进行了天气学诊断分析。结果表明: 高空南支槽和中低层切变是这次大暴雨天气过程的主要影响系统,西南低空急流为大暴雨的产生提供了充沛的水汽条件; 低层强辐合,高层强辐散的配置,使垂直上升运动得到了发展和加强,低层水汽迅速向上输送,同时引起热量、动量的垂直输送,为大暴雨的形成提供有利的动力和热力条件。

关键词: 大暴雨, 中低层切变, 西南低空急流, 物理量场, TBB, 雷达产品

Abstract:

By using the 1° × 1° reanalysis data of NCEP,FY2E satellite data,radar data,conventional observation data and encrypted data of automatic rainfall stations,the circulation background and the physical quantity field of an extreme rainstorm in central of Hu’ nan on May 13 of 2010 were analyzed. Results show that the upper south branch trough and low - level shear were the major influence systems of this heavy rainfall,and the southwest low level jet provided plenty of moisture condition for this weather process. Low level strong convergence and upper level strong divergence were conducive to high - level played“suction effect”,so the vertical upward movement developed and strengthened,and water vapor at low level was transported upward rapidly,at the same time,the vertical transportation of heat and momentum occurred,these all provided a favorable dynamic and thermodynamic conditions for the heavy rain formation.

Key words: heavy rainstorm, low - level shear, southwest low level jet, physical quantity, TBB, radar product

中图分类号: