DOI: 10.1002/2014GL060375
论文题名: Location and analysis of acoustic infrasound pulses in lightning
作者: Arechiga R. ; Stock M. ; Thomas R. ; Erives H. ; Rison W. ; Edens H. ; Lapierre J.
刊名: Geophysical Research Letters
ISSN: 0094-9998
EISSN: 1944-9729
出版年: 2014
卷: 41, 期: 13 起始页码: 4735
结束页码: 4744
语种: 英语
英文关键词: atmospheric electricity
; electrostatic interaction
; infrasound pulses
; lightning
; thunder
Scopus关键词: Acoustic wave velocity
; Atmospheric electricity
; Coulomb interactions
; Electrostatic separators
; Pulse generators
; Acoustic location
; Electrostatic measurements
; Infrasound
; Lightning channel
; Lightning mapping array
; Production mechanisms
; Rarefaction pulse
; thunder
; Lightning
英文摘要: Acoustic, VHF, and electrostatic measurements throw new light onto the origin and production mechanism of the thunder infrasound signature (<10 Hz) from lightning. This signature, composed of an initial compression followed by a rarefaction pulse, has been the subject of several unconfirmed theories and models. The observations of two intracloud flashes which each produced multiple infrasound pulses were analyzed for this work. Once the variation of the speed of sound with temperature is taken into account, both the compression and rarefaction portions of the infrasound pulses are found to originate very near lightning channels mapped by the Lightning Mapping Array. We found that none of the currently proposed models can explain infrasound generation by lightning, and thus propose an alternate theory: The infrasound compression pulse is produced by electrostatic interaction of the charge deposited on the channel and in the streamer zone of the lightning channel. Key Points Recent theories on infrasound pulse generation are tested against observations A mechanism is proposed which may explain infrasound pulse generation Correction for the speed of sound variation is developed for acoustic location ©2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84903429075&doi=10.1002%2f2014GL060375&partnerID=40&md5=7bb33133aa203fc5bce05eefb3a87f2c
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7262
Appears in Collections: 气候减缓与适应
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作者单位: Electrical Engineering Department, New Mexico Institute of Mining and Technology, Socorro NM, United States
Recommended Citation:
Arechiga R.,Stock M.,Thomas R.,et al. Location and analysis of acoustic infrasound pulses in lightning[J]. Geophysical Research Letters,2014-01-01,41(13).