闪电电磁辐射中的爆发式窄脉冲序列分析  

Analyses on Regular Pulses Burst in Electromagnetism Radiation of Lightning

作　　者：王彦辉[1] 张广庶[1] 张彤[1] 赵玉祥[1] 李亚珺[1] 

机构地区：[1]中国科学院寒区旱区环境与工程研究所西部气候环境与灾害实验室,甘肃兰州730000

出　　处：《高原气象》2009年第5期1018-1024,共7页Plateau Meteorology

基　　金：国家自然科学基金项目(40775004);中国科学院知识创新工程重要方向项目(KZCX2-YW-206-2)共同资助

摘　　要：分析了发生于闪电放电过程中一类特殊放电现象——爆发式窄脉冲序列。结果表明,在30min内测得的69例闪电放电过程中,全部存在此类爆发式窄脉冲序列。针对6例典型闪电中包含的190例爆发式窄脉冲序列进行了详细分析,发现窄脉冲典型宽度约为1μs,典型脉冲间隔4~8μs。根据脉冲时间间隔变化和极性转换将其划分为正常型、反向型、对称型和反转型。负地闪和云闪产生的爆发式窄脉冲序列特征无明显差别,而正地闪中的爆发式窄脉冲序列极性反转较为频繁。分析认为,不同类型的RBPs可能对应流光等击穿过程在不同极性小电荷区间行进的过程。A special lightning discharge phenomena named as Regular Pulses Bursts(RPBs) was analysed.The results show that the RPBs exist in all 69 lightning discharges during 30 minutes.The 190 RPBs in six typical lightning was detailedly analysed.The typical width of pulses was about 1 μs,and time interval varied from 4 to 8 μs.Four types,normal RPBs,back RPBs,symmetry RPBs,reversal RPBs were classified according to the time interval and pulse polarity.There was no obvious difference between RPBs in negative cloud t...

关 键 词：爆发式窄脉冲序列 地闪 云闪 流光 

分 类 号：P427.32[天文地球—大气科学及气象学]