主办单位:中国气象局沈阳大气环境研究所
国际刊号:ISSN 1673-503X
国内刊号:CN 21-1531/P

气象与环境学报

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一次区域大暴雨过程的雷达回波特征分析

袁海豹;姜俊玲;张雪冬   

  1. 烟台市气象局 山东烟台264003
  • 收稿日期:2007-11-27 修回日期:2008-03-11 出版日期:2008-08-01 发布日期:2008-08-01

Radar echo characteristics of regional heavy rain process

YUAN Hai-bao JIANG Jun-ling ZHANG Xue-dong   

  1. Yantai Meteorological Bureau;Yantai 264003;China
  • Received:2007-11-27 Revised:2008-03-11 Online:2008-08-01 Published:2008-08-01

摘要: 针对2007年8月10—12日烟台市区域性大暴雨天气资料的综合分析表明,热带系统的水汽条件、西风带弱冷空气的抬升力条件和副热带高压边缘的不稳定层结条件,共同构成了区域性暴雨天气过程。对新一代多普勒天气雷达资料的分析表明:数条强对流回波单体在移动的过程中合并,形成MCS,稳定少动是暴雨产生的直接原因,低空急流输送大量水汽,低层冷空气入侵导致对流上升运动强烈。

关键词: 区域大暴雨, 强对流, 低空急流, 雷达回波

Abstract: The regional heavy rain weather data from August 10 to 12,2007 in Yantai were analyzed.The results indicate that the regional heavy rain weather process is formed by the conjunct actions of water vapor of tropical system,uplift of weak cold air in westerly belt and unstable stratification at the edge of subtropical high.Based on the new generation Doppler radar data,many strong convective echo cells are united when they are moving,and come into being a mesoscale convective system(MCS).The stabilization is the direct reason causing heavy rain.Low-level jet can transport a lot of water vapor,and invasion of cold air in the low-level makes upward motion of convection strong.