地闪连续电流特征的统计分析  

STATISTICS ANALYSIS OF CHARACTERISTICS OF CONTINUING CURRENT IN C-G LIGHTNING

作　　者：张翠华[1] 张义军[1] 张广庶[1] 王才伟[1] 

机构地区：[1]中国科学院寒区旱区环境与工程研究所,甘肃省兰州市730000

出　　处：《高原气象》2000年第3期371-378,共8页Plateau Meteorology

基　　金：中国科学院重大项目!(KZ951 B1 4 0 5);国家自然基金项目!( 497752 54)

摘　　要：利用高时间分辨率的闪电电场变化资料 ,统计分析了我国甘肃和广东地区地闪连续电流特征。结果表明 :在甘肃中川地区 1 0 3次地闪中 ,带有连续电流的地闪有 49.50/ 0 ,连续电流的平均持续时间为 88.9ms;在广东地区的 98次地闪中有连续电流的地闪占 52 0/ 0 ,连续电流的平均持续时间为 1 58.2ms。在这两个地区 ,带有连续电流最多的是有 2次或 3次回击的地闪 ,连续电流的持续时间与产生它的回击和前一回击之间的时间间隔ΔT呈反相关 ,连续电流持续时间越长 ,ΔT越短。The electric field change measurements with high time resolution in Gansu and Guangdong areas were analyzed statistically. The characteristics of continuing current in C G Lightning were discussed. The results indicate that of 103 C G lightning flashes in Gansu, 49.5 percent of lightning contain continuing current. The mean duration of the continuing current is 88.9 ms. While of 98 C G lightning flashes in Guangdong, 52 percent of lightning contain continuing current. The mean duration of the continuing current is 158.2 ms. The most of containing continuing current lightning have 2～3 return strokes. There is an inverse relation between the duration of the interstroke interval just preceding the interval containing continuing current and the duration of the continuing current.

关 键 词：地闪 连续电流 电场变化 统计 

分 类 号：P427.39[天文地球—大气科学及气象学]