气候变化领域集成服务门户(CCPortal): Radio Frequency Characteristics of Volcanic Lightning and Vent Discharges

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DOI	10.1029/2020JD034495
	Radio Frequency Characteristics of Volcanic Lightning and Vent Discharges
	Behnke S.A.; Edens H.; Senay S.; Iguchi M.; Miki D.
发表日期	2021
ISSN	2169-897X
卷号	126 期号:18
英文摘要	In this study, we analyze the pulse width and spectral content of vent discharges and volcanic lightning flashes. We made measurements of electrical activity with a broadband very high frequency antenna (20–80 MHz) during an explosive eruption of Sakurajima volcano on November 8, 2019. The individual impulses that comprise vent discharges and volcanic lightning were analyzed to determine the fundamental width of the impulses and the rate of fall-off of their energy spectral density. The results show that vent discharges are more similar to volcanic lightning than they are different. The mean pulse width for both vent discharges and volcanic lightning was 50 ns. Both types of electrical activity had similar spectral content; the average slope of the amplitude spectra was −3.4 for both. Further, examination of the pulse width and spectral slope distributions showed that while the distributions of volcanic lightning and vent discharges are statistically distinct from each other, the distribution of vent discharges is a subset of the distribution of volcanic lightning. © 2021. American Geophysical Union. All Rights Reserved.
英文关键词	lightning; radio frequency; signal processing; very high frequency; volcanic lightning; volcanology
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/237011
作者单位	Space and Remote Sensing Group, Los Alamos National Laboratory, Los Alamos, NM, United States; Langmuir Laboratory, New Mexico Institute of Mining and Technology, Socorro, NM, United States; Electrical Engineering Department, New Mexico Institute of Mining and Technology, Socorro, NM, United States; Sakurajima Volcano Research Center, Disaster Prevention Research Institute, Kyoto University, Kagoshima, Japan
推荐引用方式 GB/T 7714	Behnke S.A.,Edens H.,Senay S.,et al. Radio Frequency Characteristics of Volcanic Lightning and Vent Discharges[J],2021,126(18).
APA	Behnke S.A.,Edens H.,Senay S.,Iguchi M.,&Miki D..(2021).Radio Frequency Characteristics of Volcanic Lightning and Vent Discharges.Journal of Geophysical Research: Atmospheres,126(18).
MLA	Behnke S.A.,et al."Radio Frequency Characteristics of Volcanic Lightning and Vent Discharges".Journal of Geophysical Research: Atmospheres 126.18(2021).