气候变化领域集成服务门户(CCPortal): High-Speed Spectroscopy of Lightning-Like Discharges: Evidence of Molecular Optical Emissions

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DOI	10.1029/2021JD035016
	High-Speed Spectroscopy of Lightning-Like Discharges: Evidence of Molecular Optical Emissions
	Kieu N.; Gordillo-Vázquez F.J.; Passas M.; Sánchez J.; Pérez-Invernón F.J.
发表日期	2021
ISSN	2169897X
卷号	126 期号:11
英文摘要	High speed spectra (between ∼380 nm and ∼800 nm) of meter-long lightning-like discharges recorded at 672,000 fps and 1,400,000 fps (with 1.488 and 0.714 μs time resolutions and 160 ns exposure time) show optical emissions of neutral hydrogen, singly ionized nitrogen, oxygen, and doubly ionized nitrogen which are similar to those found in natural lightning optical emissions. The spectra recorded in the near ultraviolet-blue range (380–450 nm) and visible-near infrared (475–793 nm) exhibited features of optical emissions corresponding to several molecular species (and emission bands) like cyanide radical (CN) (Violet bands), N2 (Second Positive System), N2+ (first negative system), C2 (Swan band) and CO (Quintet and Ångström bands). Molecular species can be formed at regions of the lightning-like channel where the gas temperature would be milder and/or in the corona sheath surrounding the heated channel. We have quantified and compared electron densities and temperatures derived from different sets of neutral and ion line emissions and have found different sensitivities depending on the lines used. Temperatures derived from ion emissions are higher and change faster than those derived from neutral emissions. © 2021. The Authors.
英文关键词	atmospheric electricity; lightning; lightning chemistry; spectroscopy
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/185148
作者单位	Instituto de Astrofísica de Andalucía (IAA), CSIC, Granada, Spain; Deutsches Zentrum für Luft- und Raumfahrt, Institut für Physik der Atmosphäre, Oberpfaffenhofen, Germany
推荐引用方式 GB/T 7714	Kieu N.,Gordillo-Vázquez F.J.,Passas M.,et al. High-Speed Spectroscopy of Lightning-Like Discharges: Evidence of Molecular Optical Emissions[J],2021,126(11).
APA	Kieu N.,Gordillo-Vázquez F.J.,Passas M.,Sánchez J.,&Pérez-Invernón F.J..(2021).High-Speed Spectroscopy of Lightning-Like Discharges: Evidence of Molecular Optical Emissions.Journal of Geophysical Research: Atmospheres,126(11).
MLA	Kieu N.,et al."High-Speed Spectroscopy of Lightning-Like Discharges: Evidence of Molecular Optical Emissions".Journal of Geophysical Research: Atmospheres 126.11(2021).