2008年广西雷电活动和雷电灾害分析  

Analysis of lightning activity and lightning disaster in Guangxi Province in 2008

作　　者：王义耕 刘洁 

机构地区：[1]广西壮族自治区防雷中心,广西南宁530022 [2]河北省乐亭县气象局,河北乐亭063600

出　　处：《自然灾害学报》2011年第6期124-130,共7页Journal of Natural Disasters

基　　金：国家自然科学基金资助项目(40875016);公益性行业科研专项资助项目(GYHY200806014)

摘　　要：利用闪电定位资料,对广西地区闪电活动的时间、强度和空间分布特征进行了分析。结果表明:闪电主要集中在春末仲夏发生,4-9月是闪电高发期(约占全年总闪电活动的98.33%),闪电活动绝大多数发生在午后至傍晚时分;云地闪电中负闪占绝大多数,正闪的平均强度大于负闪;闪电密度高值区主要位于桂东南、北部湾沿海地区和十万大山迎风面,闪电的空间分布差异与地形和水汽条件有很大关系。同时,根据2008年广西雷电灾害事例,分析了雷电灾害的特点和原因。The spatiotemporal distribution and intensity of lightning activities in Guangxi Province were studied by using lightning data collected by twelve-stations with lightning detection and location network in the province.The result indicates that the end of spring and mid-summer are the main lightning activity periods,about 98.33% of the lightning flashes in a year occurs frequently from April to September,and lightning activities primarily occur between afternoon and early evening.Major cloud-to-ground flashes are negative,however,the mean intensity of positive flashes is stronger than that of the negative.Lightning flash density centers are found mainly in southeast of Guangxi,Beibu Gulf areas and windward side of Shiwan Great Mountain.The difference in the spatial distribution of lightning is closely related to the topography and water vapor condition.Meanwhile,the characteristics and causes of lightning disaster which happened in Guangxi Province in 2008 were analyzed.

关 键 词：闪电活动 时空分布 雷灾特点 雷灾原因 

分 类 号：P446[天文地球—大气科学及气象学]