High-Speed Video Observations of Natural Lightning Attachment Process With Framing Rates up to Half a Million Frames per Second

doi:10.1029/2019GL085072

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DOI	10.1029/2019GL085072
	High-Speed Video Observations of Natural Lightning Attachment Process With Framing Rates up to Half a Million Frames per Second
	Qi, Qi 1,2,3; Lyu, Weitao 1,3; Ma, Ying 1,3; Wu, Bin 1,3; Chen, Lyuwen 4; Jiang, Ruijiao 1,2,3; Zhu, Yanan 5; Rakov, Vladimir A.6,7
	2019-11-11
发表期刊	GEOPHYSICAL RESEARCH LETTERS
ISSN	0094-8276
EISSN	1944-8007
出版年	2019
卷号	46 期号:21 页码:12580-12587
文章类型	Article
语种	英语
国家	Peoples R China; USA; Russia
英文摘要	Using high-speed video cameras operating with framing rates of 20 and 525 kfps, we imaged the attachment process of a natural negative cloud-to-ground flash, occurring at a distance of 490 m. Nine upward leaders were observed. A total of 12 space stems/leaders in 47 steps of the downward negative stepped leader were captured. The two-dimensional length of them was between 2.0 and 5.9 m, with an average of 3.0 m. The average interstep interval, step length, and two-dimensional speed of the downward negative leader and that of upward positive leader were statistically analyzed. The last step of the downward negative leader making contact with the upward connecting leader was recorded. The two-dimensional length of the final imaged gap between the tips of opposite-polarity leaders was estimated to be about 13 m.
英文关键词	lightning attachment process high-speed video observations striking distance
领域	气候变化
收录类别	SCI-E
WOS记录号	WOS:000495632400001
WOS关键词	LEADER PROGRESSION MODEL ; NEGATIVE STEPPED LEADER ; STROKE SIMULATION ; TALL STRUCTURES ; EXPOSURE ; FLASHES
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/224994
专题	环境与发展全球科技态势
作者单位	1.Chinese Acad Meteorol Sci, State Key Lab Severe Weather, Beijing, Peoples R China; 2.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing, Peoples R China; 3.Chinese Acad Meteorol Sci, Lab Lightning Phys & Protect Engn, Beijing, Peoples R China; 4.China Meteorol Adm, Inst Trop & Marine Meteorol, Guangzhou, Guangdong, Peoples R China; 5.Univ Alabama, Earth Syst Sci Ctr, Huntsville, AL 35899 USA; 6.Univ Florida, Dept Elect & Comp Engn, Gainesville, FL USA; 7.Natl Res Univ Higher Sch Econ, Moscow Inst Elect & Math, Moscow, Russia
推荐引用方式 GB/T 7714	Qi, Qi,Lyu, Weitao,Ma, Ying,et al. High-Speed Video Observations of Natural Lightning Attachment Process With Framing Rates up to Half a Million Frames per Second[J]. GEOPHYSICAL RESEARCH LETTERS,2019,46(21):12580-12587.
APA	Qi, Qi.,Lyu, Weitao.,Ma, Ying.,Wu, Bin.,Chen, Lyuwen.,...&Rakov, Vladimir A..(2019).High-Speed Video Observations of Natural Lightning Attachment Process With Framing Rates up to Half a Million Frames per Second.GEOPHYSICAL RESEARCH LETTERS,46(21),12580-12587.
MLA	Qi, Qi,et al."High-Speed Video Observations of Natural Lightning Attachment Process With Framing Rates up to Half a Million Frames per Second".GEOPHYSICAL RESEARCH LETTERS 46.21(2019):12580-12587.