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DOI	10.1016/j.atmosres.2021.105649
	Conductivity characteristics and corona sheath radius of lightning return stroke channel
	An T.; Yuan P.; Wan R.; Chen R.; Liu G.; Cen J.; Wang X.
发表日期	2021
ISSN	0169-8095
卷号	258
英文摘要	The characteristics of lightning corona sheath are of common concern in the lightning physics and lightning protection research. Using the spectra of two natural cloud-to-ground lightning including multiple return strokes recorded by a slit-less spectrograph, we investigated the electrical conductivity distribution along the radial direction of the channel. The results indicated that a high conductivity channel of above 104 S/m existed within an average radius of around 1.8 cm and corresponded to the temperature of around 20,000 K. This finding reflects the characteristics of the current-carrying channel. The electrical conductivity decayed steeply to about 500 S/m with increasing radius and then decayed slowly. Based on these results, it was estimated that the corona sheath radii of the return stroke channel were around 3.34–19.10 cm. The corona sheath radius was positively correlated with the leader charge quantity and the apparent diameter of the corresponding leader channel. A wide corona-channel radius corresponds to an intense discharge. © 2021 Elsevier B.V.
英文关键词	Corona sheath radius; Leader charge; Natural lightning; Return stroke
来源期刊	Atmospheric Research
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/236729
作者单位	Key Laboratory of Atomic and Molecular Physics and Functional Materials of Gansu Province, College of Physics and Electronic Engineering, Northwest Normal University, Lanzhou, Gansu 730070, China; Department of Physics, Lanzhou University of Technology, Lanzhou, 730050, China; School of Physics and Information Engineering, Shanxi Normal University, Linfen, Shanxi 041004, China; Key Laboratory of Meteorological Disaster, Ministry of Education (KLME)/Joint International Research Laboratory of Climate and Environment Change (ILCEC)/Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters (CIC-FEMD)/Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, Nanjing University of Information Science & Technology, Nanjing, 210044, China
推荐引用方式 GB/T 7714	An T.,Yuan P.,Wan R.,et al. Conductivity characteristics and corona sheath radius of lightning return stroke channel[J],2021,258.
APA	An T..,Yuan P..,Wan R..,Chen R..,Liu G..,...&Wang X..(2021).Conductivity characteristics and corona sheath radius of lightning return stroke channel.Atmospheric Research,258.
MLA	An T.,et al."Conductivity characteristics and corona sheath radius of lightning return stroke channel".Atmospheric Research 258(2021).