黔中地区一次雹暴过程闪电特征分析

利用VLF/LF三维闪电探测资料和地面降雹观测资料,对黔中地区一次雹暴过程闪电特征进行分析。结果表明:雹暴过程以地闪发生为主,地闪和云闪主要在降雹阶段发生,正地闪比例高于贵州省正地闪气候特征值。总闪频次与地闪频次在降雹之前均出现“跃增”现象,在降雹后一段时间内减少。第一阶段降雹总闪频次峰值时间提前量为10min,第二降雹阶段总闪频次峰值时间提前量为15mim。以上特征可以为利用VLF/LF闪电监测资料开展贵州冰雹监测预警和降雹识别提供参考。

Using VLF/LF three-dimensional lightning detection data and ground hail observation data,the lightning characteristics of a hailstorm process in central Guizhou were analyzed.The results show that the main occurrence of hailstorm was ground lightning,while ground lightning and cloud lightning mainly occured in hailfall stage,and the proportion of positive lightning was higher than that of positive lightning in Guizhou Province.The total lightning frequency and ground lightning frequency"increased"before hailfall,and decreased in a period of time after hail.In the first stage,the advance of the total lightning peak time was 10 minutes,and in the second stage,the advance of the total lightning peak time was 15 minutes.The above characteristics can provide reference for hail monitoring and early warning and hail identification in Guizhou by using VLF/LF lightning monitoring data.