DOI: 10.1002/2013JD020369
论文题名: Large bipolar lightning discharge events in winter thunderstorms in Japan
作者: Wu T. ; Yoshida S. ; Ushio T. ; Kawasaki Z. ; Takayanagi Y. ; Wang D.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2014
卷: 119, 期: 2 起始页码: 555
结束页码: 566
语种: 英语
英文关键词: Large bipolar event
; large bipolar pulse
; upward lightning
; winter lightning
; winter thunderstorm
Scopus关键词: Electric fields
; Electric grounding
; Thunderstorms
; Bipolar pulse
; Large bipolar event
; Upward lightning
; Winter lightnings
; Winter thunderstorms
; Lightning
; atmospheric electricity
; discharge
; electric field
; ionosphere
; lightning
; spatiotemporal analysis
; thunderstorm
; waveform analysis
; Japan
英文摘要: Using a low-frequency lightning location system comprising nine stations, we have observed and analyzed 374 large and bipolar electric field change waveforms that occurred during the winter of 2012-2013. Since the waveforms are different from those produced by any well-studied lightning discharge processes, we refer to these source discharge events using a new name: large bipolar events (LBEs). LBEs can be characterized by the following features: (1) All have the same polarity as negative return stroke. (2) All exhibit a single bipolar pulse with a pulse width around 15 μs and similar positive and negative cycles. (3) All are located on the land along the Japan Sea coast, indicating they are probably associated with high grounded objects. (4) Most LBEs produce very large electric field changes that are even larger than that of positive and negative return strokes. (5) Most LBEs are temporally isolated within several milliseconds but are frequently followed by intracloud discharges after tens of milliseconds. (6) Most LBEs produce a single well-distinguished ionospheric reflection pulse, and the time difference between LBE pulse and the corresponding reflection pulse can be used to calculate ionospheric reflection height. It is speculated that LBE is a type of powerful and transient lightning discharge event produced within a compact region of strong electric field formed when the negative charge layer in thunderclouds is very close to the top of a tall grounded object. Key Points A special type of lightning discharge called LBE is reported for the first time LBE produces single large bipolar waveform different from any other discharges LBE is produced in winter thunderstorms and is always located on land ©2014. 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/63061
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: Division of Electrical, Electronic and Information Engineering, Graduate School of Engineering, Osaka University, Osaka, Japan; Meteorological Research Institute, Ibaraki, Japan; Infrastructure Systems Company, Hitachi, Ltd., Ibaraki, Japan; Department of Electrical, Electronic and Computer Engineering, Gifu University, Gifu, Japan
Recommended Citation:
Wu T.,Yoshida S.,Ushio T.,et al. Large bipolar lightning discharge events in winter thunderstorms in Japan[J]. Journal of Geophysical Research Atmospheres,2014-01-01,119(2)