气候变化领域集成服务门户(CCPortal): Thunderstorm High-Frequency Radio Bursts With Weak Low-Frequency Radiation

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DOI	10.1029/2020GL090325
	Thunderstorm High-Frequency Radio Bursts With Weak Low-Frequency Radiation
	Liu N.Y.; Dwyer J.R.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:23
英文摘要	Brief bursts of high-frequency (HF) and very high frequency (VHF) radio emissions unaccompanied by strong low-frequency radiation have been observed during initiation and propagation of lightning or thunderstorm electrical breakdown without leading to fully fledged lightning. This paper investigates a physical mechanism to generate such radio bursts by electrical discharge activity inside a thundercloud. When a discharge consists of many high-frequency emission sources, such as streamers, that generate currents in random directions, its radiation spectrum peaks in the HF and VHF bands, and the spectral magnitudes in low frequencies are much smaller or even negligible. Combined with recent observational findings, the present study suggests that lightning initiation may begin with a short burst of many randomly occurring small-scale discharges in a localized thundercloud region. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Thunderstorms; Electrical breakdown; Electrical discharges; High frequency radios; Initiation and propagation; Lightning initiation; Low frequency radiation; Spectral magnitudes; Very high frequency; Lightning; atmospheric electricity; frequency analysis; lightning; spectral analysis; thundercloud; thunderstorm
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/169348
作者单位	Department of Physics and Astronomy and Space Science Center (EOS), University of New Hampshire, Durham, NH, United States
推荐引用方式 GB/T 7714	Liu N.Y.,Dwyer J.R.. Thunderstorm High-Frequency Radio Bursts With Weak Low-Frequency Radiation[J],2020,47(23).
APA	Liu N.Y.,&Dwyer J.R..(2020).Thunderstorm High-Frequency Radio Bursts With Weak Low-Frequency Radiation.Geophysical Research Letters,47(23).
MLA	Liu N.Y.,et al."Thunderstorm High-Frequency Radio Bursts With Weak Low-Frequency Radiation".Geophysical Research Letters 47.23(2020).