四川省闪电活动特征及其与海拔高度的关系分析  

Study on the Relationship between the Characteristics of Lightning Activity and Altitude

作　　者：魏庆 周威[2] 陈小尘 吴容 谢亚雄 张婧雯 WEI Qing;ZHOU Wei;CHEN Xiaochen;WU Rong;XIE Yaxiong;ZHANG Jingwen(Sichuan Lightning Protection Center,Chengdu 610072,China;Sichuan Provincial Meteorology Observatory,Chengdu 610072,China)

机构地区：[1]四川省防雷中心,四川成都610072 [2]四川省气象台,四川成都610072

出　　处：《成都信息工程大学学报》2023年第5期566-571,共6页Journal of Chengdu University of Information Technology

基　　金：高原与盆地暴雨旱涝灾害四川省重点实验室科技发展基金青年专项资助项目(SCQXKJQN202109)。

摘　　要：为深入分析四川省闪电活动特征及其与海拔高度的关系,利用2015-2019年四川省地闪资料和海拔高度信息资料,运用皮尔逊双变量相关性分析等方法,统计分析闪电密度和强度的空间分布特征、闪电特征与海拔高度的相关性以及不同海拔高度范围和闪电强度区间的相互关系。结果表明:负地闪年平均密度为正地闪的13倍,而正地闪强度为负地闪的3倍;负地闪年平均密度随海拔高度的增加而减少,两者呈明显的负相关,相关系数为-0.42;随着海拔高度的增加,正地闪年平均密度呈先减小再增大的趋势,但两者没有明显的相关性;正地闪和负地闪强度均在海拔高度1.0~1.5 km最强,而强度较弱的正地闪和强度较强的负地闪均偏向于发生在海拔高度更高的区域。In order to deeply analyze the characteristics of lightning activity and its relationship with altitude in Sichuan Province,the ground lightning data and altitude information data of Sichuan province from 2015 to 2019 were used.The spatial distribution characteristics of annual average lightning density and average current intensity,and the correlation between lightning characteristics and altitude,and the relationship between different altitude ranges and lightning intensity are analyzed by using Pearson bivariate analysis and other methods.The results show that the density of negative ground lightning is 13 times as much as positive ground lightning,while the intensity of positive ground lightning is 3 times as much as negative ground lightning.Density of negative lightning decreases with the increase of altitude,and the correlation coefficient between them reached-0.42.With the increase of altitude,the density of positive ground lightning decreases first and then increases,but there is no significant correlation between them.The intensity of positive and negative ground lightning is the strongest at the altitude of 1.0-1.5 km,while the positive ground lightning with weak intensity and negative ground lightning with strong intensity tend to occur in higher altitude.

关 键 词：气象学 大气电学 闪电特征 空间分布 海拔高度 皮尔逊双变量分析 

分 类 号：P427.32[天文地球—大气科学及气象学]