DOI: 10.1002/grl.50366
论文题名: Properties of unipolar magnetic field pulse trains generated by lightning discharges
作者: Kolmašová I. ; Santolík O.
刊名: Geophysical Research Letters
ISSN: 0094-9146
EISSN: 1944-8877
出版年: 2013
卷: 40, 期: 8 起始页码: 1637
结束页码: 1641
语种: 英语
英文关键词: dart-stepped leader
; K change
; train of pulses
Scopus关键词: Broadband analyzers
; dart-stepped leader
; Generation mechanism
; Interpulse interval
; Lightning discharge
; Magnetic field pulse
; Systematic analysis
; train of pulses
; Audio acoustics
; Magnetic fields
; Pulse amplitude modulation
; Lightning
; amplitude
; broadband data
; electric field
; lightning
; magnetic field
; thundercloud
; waveform analysis
英文摘要: We analyze and describe trains of regular unipolar microsecond-scale magnetic field pulses produced by intracloud lightning discharges. Waveforms of the magnetic field are measured using a newly developed broadband analyzer with a sampling interval of 12.5 ns. The observed trains contained several tens of pulses, and the time interval between neighboring pulses typically varied between 1 and 10 μs. The amplitude of the pulses also varied by 1 order of magnitude. A systematic analysis of these variations is done for the first time. The interpulse interval is usually increasing (on average by 4.1 μs during a train), and the pulse amplitude is decreasing (on average by 15% of the maximum value within a given train). We propose a possible generation mechanism based on a hypothesis that periodical charge structures are present in the thundercloud. This mechanism can explain the observed evolution of peak amplitudes and interpulse intervals. Key Points Trains of pulses generated by lightning are measured using a new instrument First systematic analysis of pulse amplitudes and inter-pulse intervals done Proposed interpretation based on charge structures interacting with leaders. ©2013. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84877940477&doi=10.1002%2fgrl.50366&partnerID=40&md5=a4d278e71f5c1d5172353b4a25d3a4aa
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/6410
Appears in Collections: 气候减缓与适应
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作者单位: Institute of Atmospheric Physics, Academy of Sciences of the Czech Republic, Boční II 1401, 141 31 Prague 4, Czech Republic
Recommended Citation:
Kolmašová I.,Santolík O.. Properties of unipolar magnetic field pulse trains generated by lightning discharges[J]. Geophysical Research Letters,2013-01-01,40(8).