气候变化领域集成服务门户(CCPortal): A Positive Cloud-to-Ground Flash Caused by a Sequence of Bidirectional Leaders that Served to Form a Ground-Reaching Branch of a Pre-Existing Horizontal Channel

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DOI	10.1029/2020JD033653
	A Positive Cloud-to-Ground Flash Caused by a Sequence of Bidirectional Leaders that Served to Form a Ground-Reaching Branch of a Pre-Existing Horizontal Channel
	Wu B.; Lyu W.; Qi Q.; Ma Y.; Chen L.; Jiang R.; Zhu Y.; Rakov V.A.
发表日期	2021
ISSN	2169897X
卷号	126 期号:11
英文摘要	High-speed video and electric field change data were used to analyze the initiation and propagation of four predominantly vertical bidirectional leaders making connection to a predominantly horizontal channel previously formed aloft. The four bidirectional leaders sequentially developed along the same path and served to form a positive branch of the horizontal in-cloud channel, which became a downward positive leader producing a 135-kA positive cloud-to-ground (+CG) return stroke. The positive (lower) end of each bidirectional leader elongated abruptly at the time of connection of the negative (upper) end to the pre-existing channel aloft. Thirty-six negative streamer-like filaments (resembling recently reported “needles”) extended sideways over ∼110 to 740 m from the pre-existing horizontal channel at speeds of ∼0.5 to 1.9 × 107 m/s, in response to the injection of negative charge associated with the +CG. © 2021. American Geophysical Union. All Rights Reserved.
英文关键词	+CG flash; bidirectional leaders; high-speed video; pre-existing horizontal channel; streamer-like filaments
语种	英语
来源期刊	Journal of Geophysical Research: Atmospheres
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/185147
作者单位	State Key Laboratory of Severe Weather, Chinese Academy of Meteorological Sciences, Beijing, China; Laboratory of Lightning Physics and Protection Engineering, Chinese Academy of Meteorological Sciences, Beijing, China; Institute of Tropical and Marine Meteorology, China Meteorological Administration, Guangzhou, China; Department of Electrical and Computer Engineering, University of Florida, Gainesville, FL, United States; Earth System Science Center, University of Alabama in Huntsville, Huntsville, AL, United States
推荐引用方式 GB/T 7714	Wu B.,Lyu W.,Qi Q.,et al. A Positive Cloud-to-Ground Flash Caused by a Sequence of Bidirectional Leaders that Served to Form a Ground-Reaching Branch of a Pre-Existing Horizontal Channel[J],2021,126(11).
APA	Wu B..,Lyu W..,Qi Q..,Ma Y..,Chen L..,...&Rakov V.A..(2021).A Positive Cloud-to-Ground Flash Caused by a Sequence of Bidirectional Leaders that Served to Form a Ground-Reaching Branch of a Pre-Existing Horizontal Channel.Journal of Geophysical Research: Atmospheres,126(11).
MLA	Wu B.,et al."A Positive Cloud-to-Ground Flash Caused by a Sequence of Bidirectional Leaders that Served to Form a Ground-Reaching Branch of a Pre-Existing Horizontal Channel".Journal of Geophysical Research: Atmospheres 126.11(2021).