雷暴云电结构与闪电关系初探  

ANALYSIS OF THE RELATIONSHIP BETWEEN CHARGE STRUCTURES AND LIGHTNING IN THUNDERSTORM

作　　者：罗霞[1] 陈渭民[1] 李照荣[2] 胡胜娟[3] 李旭[3] 

机构地区：[1]江苏省气象灾害重点实验室(南京信息工程大学),南京210044 [2]甘肃省人工影响天气办公室,兰州730020 [3]江苏省气象局,南京210008

出　　处：《气象科学》2007年第3期280-286,共7页Journal of the Meteorological Sciences

基　　金：国家自然科学基金项目(编号:40275010);江苏省气象灾害重点实验室(南京信息工程大学)项目(编号:KLME050101)共同资助

摘　　要：利用雷暴云偶极性电结构理论,结合卫星和雷达资料分析了不同荷电结构下地面电场。结果表明:当正电荷中心高度越高、负电荷中心高度越低,形成的地面负电场越大,越有利于地闪的形成;负地闪发生后或云砧下方,地面电场成正极性,易引发正地闪;地闪分布与雷达回波、卫星云图中雷暴云位置基本一致,结合雷达和卫星资料可初步判断正/负地闪发生位置。Based on the positive dipole structure of thunderstorm, combining with satellite data and radar data,this paper analyses the electric fields on the ground aroused by different electricity structures of thunderstorm. Results show that the higher center position of the positive charge and the lower ones of the negative charge will lead to stronger induced negative electric field,all of these will make the occurrence of cloud-to-ground lightning easier. When the cloud-to-ground lightning happens,the negative cloud-to-ground lightning takes place first and consumes some negative charges, then the positive ones will distribute in the plume, which will easily cause the occurrence of the positive cloud to-ground lightning. Through analyzing radar data and satellite image the cloud-to-ground lightning location can be seen.

关 键 词：雷暴云荷电结构 地面电场 雷达回波 卫星云图 地闪 

分 类 号：P427.32[天文地球—大气科学及气象学]