2019年贵州省雷电活动特征分析

利用贵州省VLF/LF三维闪电监测定位系统所取得的闪电监测资料,统计分析了贵州地区闪电活动特征。结果表明:负闪频数高于正闪、云地闪频数高于云闪,春秋季正闪比例高、夏季正闪比例低、冬季几乎无闪电活动;闪电活动一天中变化总体呈反正态分布形态,峰值时段在午后16:00-次日04:00,峰谷时段在清晨07:00-14:00;闪电活动总体分布特征为南多北少、西多东少;闪电主要集中在毕节北部、六盘水大部分区域和黔西南地区,低值区位于遵义西北部和东北部,铜仁西部和黔东南东部等地。

The characteristics of lightning activity in Guizhou are analyzed using the data of three-dimensional lightning monitoring and positioning system VLF/LF.The results show that the frequency of negative lightning is higher than that of positive lightning and cloud to ground lightning is higher than that of cloud to ground lightning.The proportion of positive lightning is high in spring and autumn,low in summer and almost no lightning activity in winter.The change of lightning activity in a day is generally in the form of arcuate distribution.The peak time period is from 16:00 in the afternoon to 04:00 the next morning,and the valley time period is 07:00-14:00.The overall distribution of lightning activity is more in the South than in the north and more in the West There is less lightning in the East;the lightning is mainly concentrated in the north of Bijie,most of Liupanshui and southwest of Guizhou,the low value area is located in the northwest and northeast of Zunyi,the west of Tongren and the east of southeast of Guizhou.