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

气象与环境学报

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“2007.08.13”汕头强雷暴天气雷达回波特征分析

许薇;甘庆辉;汤强   

  1. 汕头市气象局 广东汕头515041
  • 收稿日期:2007-11-29 修回日期:2008-01-08 出版日期:2008-04-01 发布日期:2008-04-01

Radar echo characteristics of severe thunderstorm weather on August 13,2007 in Shantou,Guangdong province

XU Wei GAN Qing-hui TANG Qiang   

  1. Shantou Meteorological Bureau;Shantou 515041;China
  • Received:2007-11-29 Revised:2008-01-08 Online:2008-04-01 Published:2008-04-01

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摘要： 根据2007年8月13日汕头强雷暴天气的雷达资料和闪电定位资料,利用统计和对比分析的方法,分析闪电活动与雷达回波之间存在的关系。结果表明:强回波面积与闪电次数具有显著相关关系,闪电活动相对于强回波面积的变化有10 min的提前量;闪电发生的位置变化与强回波的移动密切相关,而速度回波更清晰地反映和预示雷达回波的移动趋势。基本速度图中的辐合区也是闪电活动频繁的区域,雷暴发生前40 min,风廓线图中出现断裂的双干区,随后该双干区自上而下迅速遭到破坏。双干区的出现和破坏是雷暴天气产生的先兆特征。

关键词: 强雷暴天气, 闪电定位, 雷达回波, 汕头

Abstract: Based on Doppler radar data and lightning location system data of severe thunderstorm weather on August 13,2007 in Shantou,Guangdong province,the relationships between lightning and radar echo were analyzed by statistical method and comparative analysis method.The results indicate that there is a distinct correlation between strong echo areas and lightning times.Compared with the changes of the strong echo areas,the lightning activities are ahead of 10 min.The changes of lightning positions are relative to the strong echo shifts,and velocity echo can predict the trend of radar echo shift.Lightning activities often occur in convergence areas.Double-dry regions appear ahead of 40 min in the wind-profile figure before thunderstorm happens,and then double-dry regions are destroyed rapidly from up to down.The appearance and breakage of double-dry regions are the premonition of thunderstorm weather.