Observational Evidence of Negative Leader Reactivation Processes Following a Negative Return Stroke in Lightning Discharges

被引：0

作者：

Chen, Huaifei ^{[1
,2
,3
]}

Chen, Weijiang ^{[1
,4
]}

Wang, Yu ^{[5
,6
,7
,8
]}

Xiang, Nianwen ^{[9
]}

Li, Kejie ^{[9
]}

Fu, Zhong ^{[10
]}

He, Hengxin ^{[11
]}

Xiao, Lilang ^{[11
]}

机构：

[1] Wuhan Univ, Sch Elect Engn & Automat, Wuhan, Peoples R China

[2] Elect Power Res Inst, China Southern Power Grid, Guangzhou, Peoples R China

[3] Natl Engn Res Ctr UHV Technol & New Elect Equipmen, Guangzhou, Peoples R China

[4] State Grid Corp China, Beijing, Peoples R China

[5] Wuhan Nari LLC Co, State Grid Elect Power Res Inst, Wuhan, Peoples R China

[6] State Grid Elect Power Res Inst, Nanjing, Peoples R China

[7] Chinese Ctr Dis Control & Prevent, Div Infect Dis, Beijing 102206, Peoples R China

[8] Hubei Key Lab Power Grid Lightning Risk Prevent, Wuhan, Peoples R China

[9] Hefei Univ Technol, Sch Elect & Automat Engn, Hefei, Peoples R China

[10] State Grid Anhui Elect Power Co, Elect Power Res Inst, Hefei, Peoples R China

[11] Huazhong Univ Sci & Technol, State Key Lab Adv Electromagnet Engn & Technol, Wuhan, Peoples R China

来源：

GEOPHYSICAL RESEARCH LETTERS | 2024年 / 51卷 / 21期

基金：

中国国家自然科学基金;

关键词：

lightning mapping; lightning leader; reactivation processes; fast antenna; fast breakdown; recoil leader; HIGH-SPEED VIDEO; POSITIVE LEADER;

D O I：

10.1029/2023GL107685

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

High-time-resolved mapping results of two rare reactivation processes following a negative return stroke are discovered and analyzed. At first, the discharges prior to the reactivation process were dominated by positive discharges lasting for tens of milliseconds in a limited space in the vicinity of a decayed negative leader channel. The positive discharges produced no detectable electric field change. Then, negative discharges started and propagated along the decayed downward negative leader channels at a speed exceeding 106 m/s for a few microseconds and produced negative electric field changes. The analysis reveals that the processes are physically distinct from recoil leaders and side discharges in terms of propagation behaviors, electromagnetic characteristics, and time scale. The possible mechanisms of the processes are discussed. The observation suggests that the reactivation processes of the negative leaders may lead to subsequent return strokes.

引用

页数：8