两种闪电资料的对比分析  

Comparative Analysis of Two Kinds of Lightning Location Data

作　　者：孙明[1] 杨仲江[1] 钟颖颖 姜翠宏 李征[3] 

机构地区：[1]南京信息工程大学大气物理学院,南京210044 [2]常州市防雷中心,江苏常州213022 [3]江苏省防雷中心.南京210009

出　　处：《电瓷避雷器》2014年第6期109-114,共6页Insulators and Surge Arresters

基　　金：中国气象局关键技术项目(编号:CMAGJ2014M19)

摘　　要：基于人工雷暴观测记录和雷达资料,对比分析ADTD闪电定位系统和VLF/LF三维全闪电监测定位系统的探测效率、时空分布特征以及强度特点等,得出:两套系统探测到的闪电都是以负闪为主,但3D系统探测的闪电频数约是2D的3倍多;3D系统的探测效率相对2D和人工观测高,但对弱闪电的探测精度不高;两套系统的闪电月、日变化非常一致,月分布极大值峰相差1个月,日分布极大值相差3h。3D闪电系统因其对云闪的高探测效率使得监测到的闪电日比2D明显多,但各市有不同,两套系统定位的闪电日以徐州差距最明显,扬州差距最小;3D系统测得的总闪密度明显比2D大,两套系统都测得无锡、苏州密度较高,对徐州的闪电定位结果几乎相反;3D系统测得的闪电平均强度小于2D系统,3D系统对正闪强度的探测效果较差。两套系统因其型号、探测技术和自身误差等方面的差异,探测结果存在不一致,需要积累长时间数据进行对比分析,才能更好地利用准确的数据,为防雷减灾服务。Based on the artificial thunderstorm observation records and radar data, the detection efficiency, intensity characteristics, spatial and temporal distribution characteristics of lightning detected by ADTD lightning location system and 3D VLF/LF total lightning location system are comparatively analyzed. It is showed that most lightning detected by the two systems were negative while lightning frequency of 3D system is about 3 times more than that of 2D system. The detection efficiency of 3D system is relatively higher than 2D and artificial observation, but that of the weak lightning is low. The monthly and daily variation of lightning detected by the two systems is consistent though the difference between maximum values is one month and three hours respectively. Because of its high detection efficiency of cloud flash, lightning days detected by 3D lightning system are more than 2D system with difference in each city. The gap between lightning days in Xuzhou detected by the two systems is most obvious while smallest in Yangzhou. The total lightning density measured by 3D system is larger than 2D system, the density of Wuxi and Suzhou are both high measured by the two systems while the density of Xuzhou is almost the opposite. Average intensity detected by 3D system is weaker than 2D system, and its detection efficiency of positive intensity is poor. For the differences in model, detection technology and error between the two systems, the detection results are inconsistent, long time accumulation of data is needed for comparative analysis, then we can make better use of the accurate data for lightning protection and disaster reduction.

关 键 词：VLF/LF三维全闪电监测定位系统 云闪 探测效率 对比分析 闪电日 

分 类 号：P427.3[天文地球—大气科学及气象学]