雷达资料在黔东北雷电预警中的应用研究
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引用本文:方 标,张 逸,严小冬.雷达资料在黔东北雷电预警中的应用研究[J].气象与环境科学,2017,40(3):133-137.Fang Biao, Zhang Yi, Yan Xiaodong.Application Research of Radar Data in Lightning Warning over Northeast of GuiZhou[J].Meteorological and Environmental Sciences,2017,40(3):133-137.
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作者单位
方 标,张 逸,严小冬  
DOI:10.16765/j.cnki.1673-7148.2017.03.020
基金项目:
中文摘要:利用贵州省铜仁市新一代多普勒天气雷达资料和贵州省气象局闪电定位仪资料,对黔东北2013—2015年5—8月对流性降雨过程中的雷电活动与雷达回波单体之间的相关性进行统计分析,提取出反映雷电活动的雷达产品特征量,得出该区域雷电预警阈值。结果表明:35.0 dBz回波顶高(ET)突破-10 ℃层高度和25.0 dBz回波顶高突破-20 ℃层高度这两个指标预警效果较好,成功预警率POD为0.99和0.96,预警提前时间Tw分别为23和17 min;回波顶高大于9.0 km预警雷电发生,预警提前时间为11 min;垂直液态水含量可以作为雷电预警的必要条件,其值介于5.0~15.0 kg·m-3。
中文关键词:雷电预警  预警阈值  回波强度  回波顶高  垂直液态水含量
 
Application Research of Radar Data in Lightning Warning over Northeast of GuiZhou
Abstract:Based on the new generation doppler weather radar data and lightning locator data in Guizhou,the relationship between lightning activity and radar echo cells in the convective rainfall in northeast of Guizhou from May to August during 2013—2015 were statistically analyzed,the radar products quantity which could reflect the lightning activity were extracted and the threshold of lightning warning in the region were obtained.The results showed that the two indices that echo top (ET) of 35.0 dBz and 25.0 dBz reflectivity exceed the height of -10 ℃ and -20 ℃ layer had better lightning warning effect,the success rate of warning were 0.99 and 0.96,the advance time of lightning warning were 23 and 17 minutes respectively.The warning could be 11 minutes earlier than the occurrence of lightning when the ET exceeding 9.0 km were used to warning lightning.Vertical integrated liquid water (VIL) could be a necessary condition for lightning warning,whose value was 5.0~15.0 kg·m-3 .
Keywords:lightning warning  warning threshold  echo intensity  echo top  vertical integrated liquid water
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