摘要
利用贵州省三维闪电监测网资料、新一代天气雷达资料、地面观测资料,对贵州省中西部地区13次冰雹天气过程中闪电特征进行了分析。结果表明:雹暴整个生命史内主要以负地闪为主,且伴随强降水。冰雹云发展阶段,降雹区域闪电频次增加明显,降雹前闪电频次变化均出现“跃增”,部分降雹点出现闪电频次二次跃增;冰雹云消散阶段,闪电频次显著减少。冰雹云总闪、正闪均高于雷雨云,5min闪电频数大于16次且闪电频次上升度大于12次/5min可作为识别冰雹云的参考指标。另外,降雹落区与闪电密度中心区域较为吻合,闪电密度中心位置略偏降雹位置之前,闪电逐时分布标识出冰雹云的发展移动方向。以上这些特征可以为冰雹识别、冰雹短时预警预报及人工防雹作业提供参考。
The lightning characteristics of 13 hail weather cases in Central and Western Guizhou province were analyzed by using the data of the 3-D lightning monitoring network,a new generation of weather radar and ground observations.The results show that the whole life history of hailstorms is mainly caused by negative lightning and accompanies heavy rainfall.At the developing stage of the hailstorm cloud,the lightning frequency in hailstorm zone increased obviously.The lightning frequency appeared"sharp jumping"before hailstorm occurred.The lightning frequency in some hailstorm spots increased twice.At the hail cloud dissipation stage,the frequency of lightning decreased significantly.The total flashes and positive flashes of hailstorm clouds were higher than those of thunderstorm clouds.The lightning frequency per 5 minutes being more than 16 times and increasing more than 12 times per 5 minutes could be used as an index to identify hailstorm clouds.In addition,the hail zone is relatively overlapped with the center of lightning density.The position of lightning density center is slightly ahead of the hail position.The lightning distribution indicates the developing direction of hail cloud.The above characteristics can provide a reference for hail recognition,hailstone short-term warning,and artificial hail suppression.
作者
曾勇
邹书平
李丽丽
曹水
黄钰
杨哲
ZENG Yong;ZOU Shu-ping;LI Li-li;CAO Shui;HUANG Yu;YANG Zhe(Guizhou Meteorological Disaster Prevention Technology Center,Guiyang 550001,China;The Weather Modification Office of Guizhou Province,Guiyang 550001,China;Guizhou Institute of Mountain Climate and Environment,Guiyang 550001,China)
出处
《气象与环境学报》
2019年第5期123-129,共7页
Journal of Meteorology and Environment
基金
国家自然科学基金面上项目(41875169)
中国气象局云雾物理环境重点实验室开放课题(2018Z01602、2017Z01603)
贵州省科技支撑计划项目(黔科合支撑[2019]2387号)
贵州省人工影响天气办公室科研项目(GZRY201829)共同资助
关键词
冰雹云
闪电频次
闪电密度
雹云回波
冰雹预警
Hail cloud
Lightning frequency
Lightning density
Hail cloud echo
Hail early-warning
