气候变化领域集成服务门户(CCPortal): Prima Facie Evidence of the Fast Impact of a Lightning Stroke on the Lower Ionosphere

CCPortal

DOI	10.1029/2020GL090274
	Prima Facie Evidence of the Fast Impact of a Lightning Stroke on the Lower Ionosphere
	Qin Z.; Chen M.; Lyu F.; Cummer S.A.; Gao Y.; Liu F.; Zhu B.; Du Y.-P.; Usmani A.; Qiu Z.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:21
英文摘要	Studies show that intense lightning discharges can perturb nighttime lower ionosphere through induced electromagnetic fields. We report here new evidence that every lightning stroke, regardless of intensity, has an impact on both daytime and nighttime lower ionosphere. Through analysis of thousands of negative cloud-to-ground lightning strokes in southern China, we find that skywave features of a lightning sferic are closely related to its source intensity. Variations with increasing lightning intensity show a higher reflectivity from nighttime ionosphere but a larger time delay from daytime ionosphere. It also shows that the ionosphere recovers from the lightning impact in a time shorter than tens of milliseconds. This suggests that there exists a direct and fast nonlinear coupling between lightning-generated electromagnetic fields and lower ionosphere, making the ionospheric response to a lightning stroke dependent of the lightning intensity. A candidate mechanism for this is the Joule heating effect, but it needs future studies. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Electromagnetic fields; Ionosphere; Ionospheric measurement; Lightning; Meteorology; Candidate mechanisms; Cloud-to-ground lightning; Intense lightning discharges; Joule heating effect; Lightning intensity; Lightning strokes; Night-time ionosphere; Nonlinear coupling; Clouds; cloud to ground lightning; discharge; electromagnetic field; induced response; ionosphere; lightning; reflectivity; China
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/169515
作者单位	Department of Building Services Engineering, The Hong Kong Polytechnic University, Hong Kong; Guangdong-Hong Kong-Macao Greater Bay Area Weather Research Center for Monitoring Warning and Forecasting (Shenzhen Institute of Meteorological Innovation), Shenzhen, China; Nanjing Joint Institute for Atmospheric Sciences, Chinese Academy of Meteorological Sciences, Nanjing, China; Electrical and Computer Engineering Department, Duke University, Durham, NC, United States; School of Earth and Space Sciences, University of Science and Technology of China, Hefei, China; Shenzhen Meteorological Service Center, Shenzhen, China
推荐引用方式 GB/T 7714	Qin Z.,Chen M.,Lyu F.,et al. Prima Facie Evidence of the Fast Impact of a Lightning Stroke on the Lower Ionosphere[J],2020,47(21).
APA	Qin Z..,Chen M..,Lyu F..,Cummer S.A..,Gao Y..,...&Qiu Z..(2020).Prima Facie Evidence of the Fast Impact of a Lightning Stroke on the Lower Ionosphere.Geophysical Research Letters,47(21).
MLA	Qin Z.,et al."Prima Facie Evidence of the Fast Impact of a Lightning Stroke on the Lower Ionosphere".Geophysical Research Letters 47.21(2020).