DOI: 10.1002/2014GL059601
论文题名: Does the lightning current go to zero between ground strokes? Is there a current "cutoff"?
作者: Ngin T. ; Uman M.A. ; Hill J.D. ; Olsen III R.C. ; Pilkey J.T. ; Gamerota W.R. ; Jordan D.M.
刊名: Geophysical Research Letters
ISSN: 0094-10095
EISSN: 1944-9826
出版年: 2014
卷: 41, 期: 9 起始页码: 3266
结束页码: 3273
语种: 英语
英文关键词: interstroke current
; lightning
; rocket-and-wire triggered lightning
Scopus关键词: Rockets
; Wire
; Current magnitudes
; Lightning currents
; Lightning flashes
; Lightning strokes
; Orders of magnitude
; Residual current
; Sensitive measurement
; Triggered lightning
; Lightning
; lightning
; literature review
; magnitude
; measurement method
英文摘要: At the end of 120 prereturn stroke intervals in 27 lightning flashes triggered by rocket-and-wire in Florida, residual currents with an arithmetic mean of 5.3mA (standard derivation 2.8mA) were recorded. Average time constants of the current decay following return strokes were found to vary between 160μs and 550μs, increasing with decreasing current magnitude. These results represent the most sensitive measurements of interstroke lightning current to date, 2 to 3 orders of magnitude more sensitive than previously reported measurements, and contradict the common view found in the literature that there is a no current interval. Possible sources of the residual current are discussed. Key Points An average 5 mA current flows near ground prior to dart leader descent to ground No current "cutoff" is observed at ground between lightning strokes Ours is the most sensitive reported channel-base interstroke current measurement © 2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84901939717&doi=10.1002%2f2014GL059601&partnerID=40&md5=163f5e43f4d743e607e245d5822adad6
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7359
Appears in Collections: 气候减缓与适应
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作者单位: Electrical and Computer Engineering, University of Florida, Gainesville, FL, United States
Recommended Citation:
Ngin T.,Uman M.A.,Hill J.D.,et al. Does the lightning current go to zero between ground strokes? Is there a current "cutoff"?[J]. Geophysical Research Letters,2014-01-01,41(9).