贵州中西部冰雹云闪电活动特征及对降雹指示作用研究

Study on the Characteristics of Hail Cloud and Lightning Activity in the Middle and West of Guizhou Province and its Indicating Effect on Hail

利用VLF/LF三维闪电监测资料、CINRAD/CD雷达资料和地面降雹观测资料,对贵州中西部冰雹云闪电特征进行分析。结果表明:高原台地威宁平均POP和Z值均高于斜坡过渡带区域,两者平均POP值均高于贵州10 a(2006—2015年)平均POP统计特征值。斜坡过渡区域内总闪峰值平均为22次/5 min,威宁总闪峰值平均为13次/5 min。斜坡过渡带区域2σLFCR闪电跳跃信号和闪电频次峰值提前量平均为20 min和13 min,威宁2σLFCR闪电跳跃信号和闪电频次峰值提前量平均为33.7 min和29 min。2σLFCR闪电跳跃信号指示降雹优于闪电频次峰值信号,在实际中可以综合利用闪电2σLFCR跳跃信号与峰值信号识别降雹。

By using VLF/LF three-dimensional lightning monitoring data,CINRAD/CD radar data and ground hail observation data,the characteristics of hail cloud lightning in central and Western Guizhou were analyzed.The results show that the average POP and Z values of Weining plateau platform are higher than those of slope transition zone,and the average POP values of both are higher than the 10a average POP statistical characteristic values of Guizhou from 2006 to 2015.The average peak value of total lightning in the slope transition area is 22 fl/(5 min),and the average peak value of total lightning in Weining is 13 fl/(5 min).The average of 2σLFCR lightning jump signal and peak advance of lightning frequency in slope transition zone is 20 min and 13 min,and the average of 2σLFCR lightning jump signal and peak advance of lightning frequency in Weining is 33.7 min and 29 min.The 2σLFCR lightning jump signal is better than the peak signal of lightning frequency.In practice,the 2σLFCR lightning jump signal and the peak signal can be used to identify hail.