摘要
对2021-2022年4-10月海南岛三维、二维闪电定位数据进行质控处理,以及有关数据时空分布和参数特征进行对比分析.结果表明,对比探测灵敏度和探测效率,三维闪电定位系统明显优于二维闪电定位系统.二维地闪、三维地闪、三维云闪的密度分布和时分布特征相似,密度高值中心分布在海南岛西部的儋州、白沙等地,时分布呈单峰曲线特征,峰期在15:00-16:00.三维地闪、三维云闪的月分布呈三峰曲线特征,5月为主峰期、7月为次峰期、9月为第三峰期,二维地闪的月分布呈单峰曲线特征,7月为高峰期.二维正地闪占比低于三维正地闪占比,二维正、负地闪的电流中位数比三维的高;二维正、负地闪的电流幅值分别以10～20 kA、20～30 kA为地闪次数的高峰区,三维正、负地闪的电流幅值以0～10 kA为地闪次数的高峰区.质控后的二维地闪、三维地闪、三维云闪的密度分布和时分布、月分布基本特征相似,表明质控方法合理有效.
Abstract
The three-dimensional(3D)and two-dimensional(2D)lightning positioning data on Hainan Island from April to October of 2021-2022 are processed for quality control,and the spatiotemporal distribution and parameter characteristics of the two systems are compared and analyzed.The results show that:the 3D lightning positioning system is significantly better than the 2D lightning positioning system in terms of detection sensitivity and detection efficiency.The density distribution and time distribution characteristics of 2D ground lightning,3D ground lightning and 3D cloud lightning are similar,with the high density centers distributed in Danzhou and Baisha in the west of Hainan Island,and the time distribution is characterized by unimodal curve,with the peak period at 15:00-16:00.The monthly distribution of 3D ground lightning and 3D cloud lightning is characterized by a triple-peak curve,with May as the main peak,July as the second peak,and September as the third peak,and that of 2D ground lightning is characterized by a single-peak curve,with July as the peak period.The monthly distribution of 2D ground flashes is characterized by a single-peak curve,with July as the peak period.The percentage of 2D positive ground lightning is lower than that of 3D positive ground lightning,and the median current of 2D positive and negative ground lightning is higher than that of 3D positive and negative ground lightning;the current amplitudes of 2D positive and negative ground lightning are 10～20 kA and 20～30 kA,respectively,as the peaks of the ground lightning,and the current amplitudes of 3D positive and negative ground lightning are 0～10 kA as the peaks of the ground lightning.After quality control,the density distributions of 2D ground lightning,3D ground lightning and 3D clound lightning are similar to the time and monthly distributions,indicating that the quality control method is reasonable and effective.
国家科技期刊平台
NSTL
万方数据