On the Transition From Precursors to the Initial Upward Positive Leader in Negative Rocket-Triggered Lightning

doi:10.1029/2020JD033926

HFCAS OpenIR

	On the Transition From Precursors to the Initial Upward Positive Leader in Negative Rocket-Triggered Lightning
	Li, Xiao 1,2,3; Lu, Gaopeng 3,4,5; Jiang, Rubin 2,4; Zhang, Hongbo 2; Fan, Yanfeng 6; Shi, Tao 1; Qie, Xiushu 2,4; Zhang, Yang 6; Ren, Huan 1; Zhang, Chenxiao 1; Zhang, Yijun 7
	2021-09-16
发表期刊	JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
ISSN	2169-897X
通讯作者	Lu, Gaopeng(gaopenglu@gmail.com)
摘要	Precursory current pulses (precursors) and initial upward leader pulses are examined to characterize the charge transfer of precursors and the sustained upward leader during the early stage of rocket-triggered lightning. According to the analysis of six negative triggered flashes, it is found that both precursors and the initial upward positive leader (iUPL) pulse are led by a small deflection that appears at about 25 mu s prior to the major pulses. The characteristics of precursors and iUPL pulses are very similar except that the precursors generally transfer less electric charge (35.07 mu C on average) than iUPL pulses do (64.73 mu C on average). Some marginal differences in the parameters (e.g., rise time, duration) may be attributed to the modification of the current pulses caused by the different impedances of the leader channel and the steel wire. The ascending rocket causes the enhancement of electric field (E-field) in the close vicinity of the wire tip, and therefore the breakdown of the iUPL is initiated by a stronger E-field than that of the precursors. The step lengths of the precursors (defined as the extended length of the wire tip lifted by the rocket between two adjacent isolated precursors) are similar to that of iUPL pulses. Our analyses indicate that the transition from precursors to the iUPL occurs when the E-field around the wire tip is strong enough, by the accumulation of more positive charge, to launch a meter-scale breakdown and the ensuing charge transfer to ground.
关键词	initial upward positive leader (iUPL) precursor-to-leader transition precursory discharge rocket-and-wire triggered lightning
DOI	10.1029/2020JD033926
关键词[WOS]	CURRENT PULSES ; GROUND-LEVEL ; STAGE ; THUNDERCLOUD ; CORONA ; PROPAGATION ; SYSTEM ; AIR
收录类别	SCI
语种	英语
资助项目	National Key R&D Program of China[2017YFC1501501] ; Natural Science Foundation of China[41875006] ; Natural Science Foundation of China[41905004] ; Natural Science Foundation of China[41775012] ; Natural Science Foundation of China[U1938115] ; Chinese Meridian Project
项目资助者	National Key R&D Program of China ; Natural Science Foundation of China ; Chinese Meridian Project
WOS研究方向	Meteorology & Atmospheric Sciences
WOS类目	Meteorology & Atmospheric Sciences
WOS记录号	WOS:000694671900020
出版者	AMER GEOPHYSICAL UNION
引用统计	被引频次：8[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.hfcas.ac.cn:8080/handle/334002/125350
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.Univ Chinese Acad Sci, Beijing, Peoples R China 2.Chinese Acad Sci, Inst Atmospher Phys, Key Lab Middle Atmosphere & Global Environm Obser, Beijing, Peoples R China 3.Univ Sci & Technol China, Sch Earth & Space Sci, Hefei, Peoples R China 4.Nanjing Univ Informat Sci & Technol, Collaborat Innovat Ctr Forecast & Evaluat Meteoro, Nanjing, Peoples R China 5.Chinese Acad Sci, Anhui Inst Opt & Fine Mech, Key Lab Atmospher Opt, HFIPS, Hefei, Peoples R China 6.Chinese Acad Meteorol Sci, State Key Lab Severe Weather, Beijing, Peoples R China 7.Fudan Univ, Inst Atmospher Sci, Dept Atmospher & Ocean Sci, Shanghai, Peoples R China
通讯作者单位	中科院安徽光学精密机械研究所
推荐引用方式 GB/T 7714	Li, Xiao,Lu, Gaopeng,Jiang, Rubin,et al. On the Transition From Precursors to the Initial Upward Positive Leader in Negative Rocket-Triggered Lightning[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2021,126.
APA	Li, Xiao.,Lu, Gaopeng.,Jiang, Rubin.,Zhang, Hongbo.,Fan, Yanfeng.,...&Zhang, Yijun.(2021).On the Transition From Precursors to the Initial Upward Positive Leader in Negative Rocket-Triggered Lightning.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,126.
MLA	Li, Xiao,et al."On the Transition From Precursors to the Initial Upward Positive Leader in Negative Rocket-Triggered Lightning".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 126(2021).