气候变化领域集成服务门户(CCPortal): Origin of an Uncommon Multiple-Stroke Positive Cloud-to-Ground Lightning Flash With Different Terminations

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DOI	10.1029/2019JD032098
	Origin of an Uncommon Multiple-Stroke Positive Cloud-to-Ground Lightning Flash With Different Terminations
	Yuan S.; Qie X.; Jiang R.; Wang D.; Sun Z.; Srivastava A.; Williams E.
发表日期	2020
ISSN	2169897X
卷号	125 期号:15
英文摘要	An uncommon three-stroke positive cloud-to-ground (+CG) lightning flash was observed by synchronous multifrequency radiation sensors, and the three-dimensional development of the channel was carefully mapped. Results show that three positive strokes grounded at different points approximately 4–8 km apart and time intervals between neighboring +CG strokes were 85 and 222 ms, respectively. This +CG flash was preceded by an intracloud (IC) discharge. The locations of the termination points on the ground were just below the preestablished horizontal IC discharge channels, and the three strokes were linked with each other through sharing horizontal negative leader channels inside the cloud. There were stepping pulses less than 0.4 ms before the first and second return strokes (RSs), and their location results were distributed nearby the following RS, indicating that the pulses might be associated with the attachment process. The first and second positive strokes occurred when the horizontal in-cloud negative channel stopped extending, while the third positive stroke occurred below the opposite end of an advancing negative leader in the cloud. The above results suggest that the downward positive leader preceding the strokes possibly developed either from different decayed leader channels or from the opposite end of an advancing leader channel. A high-speed camera captured a downward positive attempted leader from another +CG flash, revealing how a downward positive leader incepted from a horizontal negative lightning channel. © 2020. American Geophysical Union. All Rights Reserved.
英文关键词	different termination; multistroke; positive cloud-to-ground lightning
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/185869
作者单位	Key Laboratory of Middle Atmosphere and Global Environment Observation, Institute of Atmospheric Physics, Chinese Academy of Science, Beijing, China; College of Earth and Planetary Science, University of Chinese Academy of Science, Beijing, China; Lincoln Laboratory, Massachusetts Institute of Technology, Cambridge, MA, United States
推荐引用方式 GB/T 7714	Yuan S.,Qie X.,Jiang R.,et al. Origin of an Uncommon Multiple-Stroke Positive Cloud-to-Ground Lightning Flash With Different Terminations[J],2020,125(15).
APA	Yuan S..,Qie X..,Jiang R..,Wang D..,Sun Z..,...&Williams E..(2020).Origin of an Uncommon Multiple-Stroke Positive Cloud-to-Ground Lightning Flash With Different Terminations.Journal of Geophysical Research: Atmospheres,125(15).
MLA	Yuan S.,et al."Origin of an Uncommon Multiple-Stroke Positive Cloud-to-Ground Lightning Flash With Different Terminations".Journal of Geophysical Research: Atmospheres 125.15(2020).