Low Frequency Magnetic Field Observations of Natural Positive Leaders Featuring Stepwise Propagation

doi:10.1029/2023GL105540

	Low Frequency Magnetic Field Observations of Natural Positive Leaders Featuring Stepwise Propagation
	Wang, Ziyi 8; Lu, Gaopeng 6,7,8; Li, Xiao 8; Zhang, Hongbo 5; Fan, Yanfeng 4; Ren, Huan 8; Zhang, Chenxiao 8; Jiang, Rubin 3,5; Qie, Xiushu 3,5,7; Cohen, Morris B.2
刊名	GEOPHYSICAL RESEARCH LETTERS
	2023-10-28
卷号	50
关键词	positive lightning leader low-frequency (LF) magnetic pulses stepwise propagation
ISSN号	0094-8276
DOI	10.1029/2023GL105540
通讯作者	Lu, Gaopeng(gaopenglu@gmail.com)
英文摘要	We examine the low-frequency (LF) magnetic pulses recorded for the positive leader in two natural lightning flashes as recorded on the high-speed video camera. The captured positive leader in both cases propagated in a stepwise manner at least over several milliseconds according to the concurrent sequence of LF magnetic pulses. By comparing with previous studies on positive leaders under different situations, the average inter-pulse intervals (11.7 and 20.3 mu s, respectively) obtained for our natural cases are shorter than that of upward positive leaders in rocket-triggered (typically >25 mu s) and tower-initiated lightning (62 mu s in one case). Hence, the stepwise propagation of positive leaders in natural lightning is likely more frequent than that in object-induced lightning, reflecting a possible influence of ambient electric field and other meteorological factors on the stepwise feature of positive leader. The stepwise extension might be common for positive leaders developing in various scenarios.
资助项目	This work is supported by National Key Ramp;D Program of China (2017YFC1501501), the CAS Project of Stable Support for Youth Team in Basic Research Field (YSRR-018), National Natural Science Foundation of China (41875006 and U1938115), the Chinese Meridia[2017YFC1501501] ; National Key Ramp;D Program of China[YSRR-018] ; CAS Project of Stable Support for Youth Team in Basic Research Field[41875006] ; CAS Project of Stable Support for Youth Team in Basic Research Field[U1938115] ; National Natural Science Foundation of China ; Chinese Meridian Project[183311KYSB20200003] ; International Partnership Program of Chinese Academy of Sciences
WOS关键词	CURRENT PULSES
WOS研究方向	Geology
语种	英语
出版者	AMER GEOPHYSICAL UNION
WOS记录号	WOS:001085005300001
资助机构	This work is supported by National Key Ramp;D Program of China (2017YFC1501501), the CAS Project of Stable Support for Youth Team in Basic Research Field (YSRR-018), National Natural Science Foundation of China (41875006 and U1938115), the Chinese Meridia ; National Key Ramp;D Program of China ; CAS Project of Stable Support for Youth Team in Basic Research Field ; National Natural Science Foundation of China ; Chinese Meridian Project ; International Partnership Program of Chinese Academy of Sciences
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/133339]
专题	中国科学院合肥物质科学研究院
通讯作者	Lu, Gaopeng
作者单位	1.World Meteorol Org, Marine Serv Div, Serv Dept, Geneva, Switzerland 2.Georgia Inst Technol, Sch Elect & Comp Engn, Atlanta, GA USA 3.Univ Chinese Acad Sci, Beijing, Peoples R China 4.Chinese Acad Meteorol Sci, State Key Lab Severe Weather, Beijing, Peoples R China 5.Chinese Acad Sci, Inst Atmospher Phys, Key Lab Middle Atmosphere & Global Environm Observ, Beijing, Peoples R China 6.Chinese Acad Sci, Anhui Inst Opt & Fine Mech, Key Lab Atmospher Opt, HFIPS, Hefei, Peoples R China 7.Nanjing Univ Informat Sci & Technol, Collaborat Innovat Ctr Forecast & Evaluat Meteorol, Nanjing, Peoples R China 8.Univ Sci & Technol China, Sch Earth & Space Sci, Hefei, Peoples R China
推荐引用方式 GB/T 7714	Wang, Ziyi,Lu, Gaopeng,Li, Xiao,et al. Low Frequency Magnetic Field Observations of Natural Positive Leaders Featuring Stepwise Propagation[J]. GEOPHYSICAL RESEARCH LETTERS,2023,50.
APA	Wang, Ziyi.,Lu, Gaopeng.,Li, Xiao.,Zhang, Hongbo.,Fan, Yanfeng.,...&Wang, Zhichao.(2023).Low Frequency Magnetic Field Observations of Natural Positive Leaders Featuring Stepwise Propagation.GEOPHYSICAL RESEARCH LETTERS,50.
MLA	Wang, Ziyi,et al."Low Frequency Magnetic Field Observations of Natural Positive Leaders Featuring Stepwise Propagation".GEOPHYSICAL RESEARCH LETTERS 50(2023).