江苏省地闪密度及雷电流幅值分布  

Distribution of lightning density and lightning current amplitude in Jiangsu province

作　　者：徐鸣一[1,2] 王振会[1,2] 樊荣[1,2] 周俊驰[1,2] 曾庆锋[1,2] 

机构地区：[1]南京信息工程大学气象灾害省部共建教育部重点实验室,南京210044 [2]南京信息工程大学大气物理学院,南京210044

出　　处：《南京信息工程大学学报（自然科学版）》2010年第6期557-561,共5页Journal of Nanjing University of Information Science & Technology（Natural Science Edition）

基　　金：公益性行业科研专项(GYHY2008-06014)

摘　　要：从雷电防护中重点关心的地闪密度和雷电流幅值两个方面进行分析,引入时间权重法结合人工观测雷暴日资料和闪电定位仪资料,给出地闪密度分布情况并依此绘制江苏省雷区分布图,对照Anderson经验公式拟合雷电流幅值概率分布情况.结果表明:江苏省地闪密度的分布趋势是南部比北部多,西部比东部多;洪泽湖周边、太湖和宁镇丘陵周边是江苏省雷电防护重点区域.江苏省雷电流幅值概率分布符合Anderson经验公式,幅值主要在20～40kA范围内变化.Lightning density and lightning current amplitude are two important parameters in lightning protection. In this article,time-weighted average method is introduced to combine data recorded by conventional method and lightning location system （ LLS） ,Matlab is employed to realize the fitting of lightning current amplitude according to Anderson empirical formula. Results show that in Jiangsu province lightning activities occurred more in the southern regions than northern regions,more in the western regions than eastern regions. Lightning protection should be an important task particularly in regions surrounding Hongze Lake,Taihu Lake and Ningzhen hills; probability distribution of lightning current amplitude fits with Anderson experimental formula,and amplitude mainly distributed in the range from 20 kA to 40 kA.

关 键 词：地闪密度 时间权重法 雷电流幅值 Anderson经验公式 

分 类 号：P427.32[天文地球—大气科学及气象学]