“Leader-return Stroke Model and Calculation of Artificial Triggered Lightning Stroke’s Characteristics
On the basis of “leader model and “return stroke model about cloud-to-ground lightning stroke channel, “leader-return stroke model was established. This model was used to calculate the slow electric field change data to explore the characteristics of twelve dart leaders and subsequent return strokes in three artificial triggered lightning on August 2, 2005. The results indicated that the height of three triggered lightning was respectively 8.68, 4.48 and 10.59 km, the line charge density along the leader channel was from 49.31 to 130.05μC/m, the average dart leader speed was from 0.23 ×10 7 to 1.48 ×10 7 m/s, the average dart leader current was from 0.14 to 1.87kA, the electric potential of the dart leader channel was from 7.94 to 20.33MV, the charge neutralized by subsequent return stroke was from 0.16 to 1.21C, the average subsequent return stroke speed was from 2.61 ×10 7 to11.86 ×10 7 m/s and the average return stroke current was from 1.56 to 12.59kA. The analysis also showed the application of “leader-return stroke model not only reduced the demand for the number of observation point and observation environment but also provided with preferable calculation capability for the lightning channel.
Dong Zheng Yijun Zhang Weitao Lü Qing Meng Xiushu Qie
Laboratory of Lightning Physics and Protection, Chinese Academy of Meteorological Sciences,Haidian D Cold and Arid Regions Environmental and Engineering Research Institute,Chinese Academy of Sciences,
国际会议
第13届国际大气电学会议(The 13th International Conference on Atmospheric Electricity)
北京
英文
2007-08-13（万方平台首次上网日期，不代表论文的发表时间）