The current variation along the discharge channel in cloud-to-ground lightning

被引：9
|
作者：
Zhang, Meng [1 ]
Yuan, Ping [1 ]
Liu, Guorong [1 ]
Wang, Xuejuan [2 ]
Cen, Jianyong [3 ]
An, Tingting [1 ]
机构：
[1] Northwest Normal Univ, Coll Phys & Elect Engn, Key Lab Atom & Mol Phys & Funct Mat Gansu Prov, Lanzhou 730070, Gansu, Peoples R China
[2] Nanjing Univ Informat Sci & Technol, Sch Elect & Informat Engn, Nanjing 210044, Jiangsu, Peoples R China
[3] Shanxi Normal Univ, Sch Phys & Informat Engn, Linfen 041004, Shanxi, Peoples R China
来源：
ATMOSPHERIC RESEARCH | 2019年 / 225卷
基金：
中国国家自然科学基金;
关键词：
Cloud-to-ground lightning; Lightning current; Current decay; Lightning spectra; Return stroke; Discharge channel; ELECTRIC-FIELD CHANGES; SPECTRAL FEATURES; MAGNETIC-FIELDS; BASE CURRENT; RETURN; INTENSITY; MODEL;
D O I：
10.1016/j.atmosres.2019.04.001
中图分类号：
P4 [大气科学（气象学）];
学科分类号：
0706 ; 070601 ;
摘要：
The spectra of cloud-to-ground lightning return strokes channels are obtained by a slit-less high-speed spectrograph. Based on the positive correlation between discharge current and the intensity of ionic lines in the spectra, variation characteristics of return stroke current along the discharge channel are investigated. The result shows that there are three types of the variation trend for discharge current with the increase of height along the channel, they are exponential attenuation, linear attenuation and basically unchanged, respectively. The attenuation factor is roughly positive correlated with the discharge intensity. During strong discharge process the current tends to decay exponentially. In addition, during return stroke process, the current attenuation gradually flattens with time.
引用
收藏
页码：121 / 130
页数：10
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