气候变化领域集成服务门户(CCPortal): Numerical Simulation of Stepping and Branching Processes in Negative Lightning Leaders

CCPortal

DOI	10.1029/2019JD031360
	Numerical Simulation of Stepping and Branching Processes in Negative Lightning Leaders
	Syssoev A.A.; Iudin D.I.; Bulatov A.A.; Rakov V.A.
发表日期	2020
ISSN	2169897X
卷号	125 期号:7
英文摘要	A numerical model with physical timing and grid spacing of 3 m is applied to studying the progression (including stepping and branching) of negative lightning stepped leader. The asymmetry between positive and negative streamers is taken into account via using polarity-dependent initiation and propagation field thresholds. The stepped nature of negative leader is confirmed to be caused by this asymmetry. The step formation process of the negative leader is modeled to begin with the appearance of space stems inside and in the immediate vicinity of its streamer zone (corona streamer burst completing the preceding step). Some of those space stems evolve into space leaders, which can connect to the primary leader channel, thereby facilitating its extension. Model-predicted morphology and dynamics of negative leaders are in good agreement with the recent recordings of lightning stepped and dart-stepped leaders obtained using high-speed video cameras, and their electrical parameters are in line with the current knowledge on negative lightning leaders. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	lightning discharge; negative stepped leader; numerical simulation; physical timing; polarity asymmetry; space leaders
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/186070
作者单位	Institute of Applied Physics of Russian Academy of Sciences, Nizhny Novgorod, Russian Federation; Department of Medical Physics and Informatics, Privolzhsky Research Medical University, Nizhny Novgorod, Russian Federation; National Research University Higher School of Economics, Moscow, Russian Federation; Department of Electrical and Computer Engineering, University of Florida, Gainesville, FL, United States
推荐引用方式 GB/T 7714	Syssoev A.A.,Iudin D.I.,Bulatov A.A.,et al. Numerical Simulation of Stepping and Branching Processes in Negative Lightning Leaders[J],2020,125(7).
APA	Syssoev A.A.,Iudin D.I.,Bulatov A.A.,&Rakov V.A..(2020).Numerical Simulation of Stepping and Branching Processes in Negative Lightning Leaders.Journal of Geophysical Research: Atmospheres,125(7).
MLA	Syssoev A.A.,et al."Numerical Simulation of Stepping and Branching Processes in Negative Lightning Leaders".Journal of Geophysical Research: Atmospheres 125.7(2020).