Upward negative leaders in positive triggered lightning: Stepping and branching in the initial stage

doi:10.1002/2017GL074228

GSTDTAP > 气候变化

DOI	10.1002/2017GL074228
	Upward negative leaders in positive triggered lightning: Stepping and branching in the initial stage
	Pu, Yunjiao 1,2; Jiang, Rubin 1,3; Qie, Xiushu 1,2,3; Liu, Mingyuan 1; Zhang, Hongbo 1,2; Fan, Yanfeng 1,2; Wu, Xueke 4
	2017-07-16
发表期刊	GEOPHYSICAL RESEARCH LETTERS
ISSN	0094-8276
EISSN	1944-8007
出版年	2017
卷号	44 期号:13
文章类型	Article
语种	英语
国家	Peoples R China
英文摘要	By conducting comprehensive observation on the rarely triggered positive lightning flashes, two cases of upward negative leaders were quantitatively investigated with simultaneous data of current, optical, and electromagnetic field changes at fine time resolution. The impulsive channel current associated with the initial leader stepping involved pulse interval, peak, charge of 19.1 mu s, 122.3 angstrom, 465.9 mu C, and 20.3 mu s, 58.4 angstrom, 267.2 mu C, for the two cases, respectively. The negative charge of an individual step was nearly an order of magnitude larger than that of the positive leader step in triggered lightning. The upward negative stepped leader branches shortly after initiation, and consequently, the stepping-caused current pulses became multipeaked, wider, and more frequent in waveforms. The main leader tip propagated at an average speed of 2.10 x 10(5) m/s, while its partial speed fluctuated a lot as was significantly influenced by the behaviors of subbranches development.
领域	气候变化
收录类别	SCI-E
WOS记录号	WOS:000406257400065
WOS类目	Geosciences, Multidisciplinary
WOS研究方向	Geology
引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/29152
专题	气候变化
作者单位	1.Chinese Acad Sci, Inst Atmospher Phys, Key Lab Middle Atmosphere & Global Environm Obser, Beijing, Peoples R China; 2.Univ Chinese Acad Sci, Coll Earth Sci, Beijing, Peoples R China; 3.Nanjing Univ Informat Sci & Technol, Collaborat Innovat Ctr Forecast & Evaluat Meteoro, Nanjing, Jiangsu, Peoples R China; 4.Lanzhou Univ, Coll Atmospher Sci, Lanzhou, Gansu, Peoples R China
推荐引用方式 GB/T 7714	Pu, Yunjiao,Jiang, Rubin,Qie, Xiushu,et al. Upward negative leaders in positive triggered lightning: Stepping and branching in the initial stage[J]. GEOPHYSICAL RESEARCH LETTERS,2017,44(13).
APA	Pu, Yunjiao.,Jiang, Rubin.,Qie, Xiushu.,Liu, Mingyuan.,Zhang, Hongbo.,...&Wu, Xueke.(2017).Upward negative leaders in positive triggered lightning: Stepping and branching in the initial stage.GEOPHYSICAL RESEARCH LETTERS,44(13).
MLA	Pu, Yunjiao,et al."Upward negative leaders in positive triggered lightning: Stepping and branching in the initial stage".GEOPHYSICAL RESEARCH LETTERS 44.13(2017).