Simultaneous Observations of Electric Signals at 60m and 550m from Altitude-Triggered Lightning

摘要：

In the summer of 2005, Five lightning flashes were successfully triggered with three classical triggering flashes and two altitude triggering flashes in China. This paper mainly presents the electric fields change of the bidirectional leader system and the dart leader-return stroke of two altitude-triggered flashes at distances of 60m and 550m from the triggering site. The electric fields changes produced by the bidirectional leader system at 60m and 550m are negative 4.7-14.6kV/m and positive 0.11-0.16 kV/m, respectively. The estimated slope coefficient of the charge distribution along lightning channel for the bidirectional leader system is (1.2-3.8)×10 k -7 C/m 2 . The dart leader-return stroke sequences appear as V-shaped pulses, the bottom of V-shape being associated with the transition from the leader to the return stroke. The electric fields changes produced by the dart leaders at 60m and 550m are 17.8 kV/m and 1.2kV/m respectively. The distance dependence of the dart leader electric fields change is r -1.18 .

关键词： Triggered lightning Leader, Stroke Electric fields change

作者: Qilin Zhang Xiushu Qie Yang Zhao Xiangzhen Kong Jing Yang

作者单位: Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China

会议类型: 国际会议

会议名称: 第13届国际大气电学会议(The 13th International Conference on Atmospheric Electricity)

会议地点: 北京

会议语种:英文

在线出版日期: 2007-08-13（万方平台首次上网日期，不代表论文的发表时间）