期刊文献+

负地闪先导-回击过程的光学观测和分析 被引量:31

Optical Observations and Analysis of Leader-return Stroke Processes Involved in Negative Cloud-to-ground Lightning Flashes
下载PDF
导出
摘要 为了解闪电先导传输的过程以及雷电灾害产生的机理,利用高速摄像观测自然闪电的资料,结合地面电场变化观测,分析了27次自然负地闪先导-回击发展过程的特征。结果表明:〉90%的负地闪首次回击前下行梯级先导具有明显的多级分叉现象,随其下行发展,接近地面时分叉逐渐增多,先导的发展速度为10^4~10^5m/s量级;约30%(8/27)的地闪具有多个接地点;约44%(12/27)的地闪具有多次回击,其中回击次数最大值为13,回击次数〉10的地闪有4次;多接地闪电中有62%(5/8)具有多次回击,但发生多次回击的接地点均只有1个,其余的接地点均只发生1次回击。 The characteristics of leader-return stroke processes including 27 natural negative cloud-to-ground (CG) lightning discharges were analyzed by using the data obtained by high speed cameras and combining the records of electric field changes produced by lightning on the ground. The results indicates that 90% of stepped leader just before first return stroke present significant branches, and the amounts of branches increase with the development downward of leaders. The speed of stepped leaders is of the magnitude of 10^4 -10^5 m/s. Around 30% (3/27) of lightning discharges produce more than one contact ground point. About 44% (12/27) produce multiple return strokes, and the maximum number of return stroke is 13. There were 4 lightning discharges with more than 10 return strokes. 62% (5/8) with multiple contact ground points produce more than one return strokes. All of those subsequent return strokes have a same ground point in each flash, while each of other ground points is only struck once.
出处 《高电压技术》 EI CAS CSCD 北大核心 2008年第10期2022-2029,共8页 High Voltage Engineering
基金 国家自然科学基金(4087500340605004) 公益性行业科研专项(GYHY2007622)~~
关键词 负先导分叉 回击 多接地点 高速摄像 地闪 先导 channel branches of negative leader return stroke multiple contact ground points high-speed camera cloud-to-ground lightning leader
  • 相关文献

参考文献15

  • 1Rakov V A, Uman M A. Lightning: physics and effects[M]. Cambridge, UK: Cambridge University Press, 2003:108-152.
  • 2Rakov V A, Uman M A, Thottappillil R. Review of lightning properties from electric field and TV observations[J]. Journal of Geophysical Research, 1994, 99(D5) : 10745-10750.
  • 3Parker N G, Krider E P. A portable, PC-based system for making optical and electromagnetic measurements of lightning[J]. Journal of Applied Meteorology, 2003, 42(6) : 739-751.
  • 4Valine W C, Krider E P. Statistics and characteristics of cloud- to- ground lightning with multiple ground contacts[J]. Journal of Geophysical Research, 2002, 107: D20, 4441, doi: 10. 1029/2001JD001360.
  • 5Mazur V, Krehbiel P R, Shao X M. Correlated high-speed video and radio interferometric observations of a cloud to-ground lightning flash[J]. Journal of Geophysical Research, 1995, 100 (12): 25731-25753.
  • 6王才伟,刘欣生,董万胜,张翠华.人工触发闪电通道的发光特征[J].高原气象,1998,17(1):10-23. 被引量:27
  • 7Ballarotti M G, Saba M M F, Pinto Jr O. High-speed camera observations of negative ground flashes on a millisecond-scale [J]. Geophysical Research Letters, 2005, 32: L23802, doi: 10. 1029/2005GL023889.
  • 8Saba M M F, Ballarotti M G, Pinto Jr O. Negative cloud-to-ground lightning properties from high speed video observations [J]. Journal of Geophysical Research, 2006, 111: 1303101, doi: 10. 1029/2005JD006415.
  • 9Cmapos L Z S, Saba M M F, Pinto Jr O, et al. Waveshapes of continuing currents and properties of M-components in natural negative cloud-to-ground lightning from high-speed video observations[J]. Atmospheric Research, 2007, 84(4): 302-310.
  • 10吕伟涛,张义军,周秀骥,孟青,郑栋,马明,王飞,陈绍东,郄秀书.火箭触发闪电通道的亮度特征分析[J].气象学报,2007,65(6):983-993. 被引量:17

二级参考文献35

  • 1陈明理,刘新中,刘欣生,王怀斌.1991年北京延庆人工引雷实验及分析[J].地球物理学报,1994,37(2):167-173. 被引量:6
  • 2Uman M A. The Lightning Discharge. San Diego: Academic, 1987,138.
  • 3Horri K, S Sumi. Technology and observed data of triggered lightning by rocket. T. IEE Japan, 1997, 117-B: 441-445.
  • 4Xinsheng Liu, Caiwei Wang, Yijun Zhang, et al. Experiment of artificially triggering lightning in China. J. Geophys. Res, 1994,99(D5) : 10727.
  • 5Uman M A, V A. Rakov et al. Triggered-lightning experiment at Camp Blanding, Florida(1993 - 1995). J. IEE Japan, 1997,117-B : 446 - 452.
  • 6Laroche P, V Idone, A. Eybert-berard and L. Barret, Observation of bi-directional leader development in a triggered lightning flash. 1991 International Aerospace and Ground Conference on Lightning and Static Electricity, Florida, April. 1991, 57(1): 1 - 10.
  • 7Wang D, V A Rakov, M A Uman, et al. Attachment process in rockettriggered lightning strokes. J. Gophys. Res., 1999, 104:2143.
  • 8Kito Y, K Horii et al. Optical aspects of winter lightning discharges triggered by rocket-wire technique in Hokuriku district of Japan. J.Geophys. Res., 1985, 90:6147.
  • 9Jordan D M, V P Idone, R E Orville, et al. Luminosity characteristics of lightning M component. J. Geophys. Res,, 1995, 100:25695.
  • 10Wang Daohong,International Conference on Lightning Protection to be published,1998年

共引文献57

同被引文献417

引证文献31

二级引证文献251

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部