DOI: 10.1002/jgrd.50805
论文题名: Infrasound pulses from lightning and electrostatic field changes: Observation and discussion
作者: Chum J. ; Diendorfer G. ; Šindelářová T. ; Baše J. ; Hruška F.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期: 19 起始页码: 10653
结束页码: 10664
语种: 英语
英文关键词: Electrostatic mechanism
; Infrasound
; Lightning
; Slowness method
; Thunder
Scopus关键词: International cooperation
; Lightning
; Experimental investigations
; Generation mechanism
; Infrasound
; Lightning detection
; Lightning location
; Slowness method
; Thunder
; Thunderstorm activity
; Electrostatics
; array
; compression
; lightning
; observational method
; thunderstorm
; Czech Republic
英文摘要: Narrow (~1-2 s) infrasound pulses that followed, with ~11 to ~50 s delays, rapid changes of electrostatic field were observed by a microbarometer array in the Czech Republic during thunderstorm activity. A positive pressure fluctuation (compression phase) always preceded decompression; the compression was usually higher than the decompression. The angles of arrival (azimuth and elevation) were analyzed for selected distinct events. Comparisons of distances and azimuths of infrasound sources from the center of microbarometer array with lightning locations determined by the European Cooperation for Lighting Detection lightning detection network show that most of the selected events can be very likely associated with intracloud (IC) discharges. The preceding rapid changes of electrostatic field, their potential association with IC discharges, and high-elevation angles of arrival for near infrasound sources indicate that an electrostatic mechanism is probably responsible for their generation. It is discussed that distinguishing the relative role of thermal and electrostatic mechanism is difficult and that none of the published models of electrostatic production of infrasound thunder can explain the presented observations precisely. A modification of the current models, based on consideration of at least two charged layers, is suggested. Further theoretical and experimental investigations are however needed to get a better description of the generation mechanism. Key Points Simultaneous electrostatic and infrasound measurements were performed Electrostatic mechanism of infrasound production is discussed Distinct infrasound pulses are observed for IC discharges ©2013. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/63271
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
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作者单位: Department of Upper Atmosphere, Institute of Atmospheric Physics, Academy of Sciences of the Czech Republic, Bocni II/1401, Prague 4, 14131, Czech Republic; Austrian Electrotechnical Association (OVE-ALDIS), Vienna, Austria; Department of Aeronomy, Institute of Atmospheric Physics, Academy of Sciences of the Czech Republic, Prague 4, Czech Republic
Recommended Citation:
Chum J.,Diendorfer G.,Šindelářová T.,et al. Infrasound pulses from lightning and electrostatic field changes: Observation and discussion[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(19)