气候变化领域集成服务门户(CCPortal): High-Energy Radiation From Natural Lightning Observed in Coincidence With a VHF Broadband Interferometer

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DOI	10.1029/2020JD033745
	High-Energy Radiation From Natural Lightning Observed in Coincidence With a VHF Broadband Interferometer
	Urbani M.; Montanyà J.; van der Velde O.A.; López J.A.; Arcanjo M.; Fontanes P.; Romero D.; Roncancio J.A.
发表日期	2021
ISSN	2169897X
卷号	126 期号:7
英文摘要	This work presents the first simultaneous X-ray measurements from natural lightning in coincidence with a very high frequency (VHF) broadband interferometer. During an observational campaign in north-central Colombia, five intense X-ray bursts were detected from negative stepped leaders and two X-ray emissions from a dart leader. Thanks to the high angular and time resolution of the interferometer, it was possible to locate the origin of high-energy radiation during the lightning leader propagation. We study the correlation with VHF pulses and the two-dimensional speed of the leader channels. A strong temporal correspondence has been observed between the high-energy emissions and the most intense VHF pulses, which suggests the runaway electrons as a shared mechanism. The observations show that an X-ray burst can have multiple high-energy sources belonging to different leader branches, that can be several hundreds of meters apart. Therefore, from a spatial point of view, not a unique origin has to be searched, but an extensive origin of the X-ray burst should be considered. We hypothesize similar conclusions in particular for downward TGFs and maybe for TGFs in general. © 2021. American Geophysical Union. All Rights Reserved.
英文关键词	High-energy emissions; interferometry; Terrestrial Gamma-ray Flashes; X-ray bursts
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/185374
作者单位	Electrical Engineering Department, Universitat Politècnica de Catalunya, Barcelona, Spain
推荐引用方式 GB/T 7714	Urbani M.,Montanyà J.,van der Velde O.A.,et al. High-Energy Radiation From Natural Lightning Observed in Coincidence With a VHF Broadband Interferometer[J],2021,126(7).
APA	Urbani M..,Montanyà J..,van der Velde O.A..,López J.A..,Arcanjo M..,...&Roncancio J.A..(2021).High-Energy Radiation From Natural Lightning Observed in Coincidence With a VHF Broadband Interferometer.Journal of Geophysical Research: Atmospheres,126(7).
MLA	Urbani M.,et al."High-Energy Radiation From Natural Lightning Observed in Coincidence With a VHF Broadband Interferometer".Journal of Geophysical Research: Atmospheres 126.7(2021).