DOI: 10.1002/2015GL066802
论文题名: Lightning as a space-weather hazard: UK thunderstorm activity modulated by the passage of the heliospheric current sheet
作者: Owens M.J. ; Scott C.J. ; Bennett A.J. ; Thomas S.R. ; Lockwood M. ; Harrison R.G. ; Lam M.M.
刊名: Geophysical Research Letters
ISSN: 0094-8411
EISSN: 1944-8142
出版年: 2015
卷: 42, 期: 22 起始页码: 9624
结束页码: 9632
语种: 英语
英文关键词: heliospheric magnetic field
; lightning
; solar wind
; space weather
; thunderstorm
Scopus关键词: Lightning
; Lightning protection
; Magnetic fields
; Magnetic polarity
; Meteorological problems
; Solar wind
; Thunderstorms
; Corotating interaction regions
; Energetic particle flux
; Energetic particles
; Heliospheric current sheet
; Heliospheric magnetic fields
; Lightning flash rate
; Space weather
; Thunderstorm activity
; Earth (planet)
; amplification
; compression
; electromagnetic field
; energy flux
; lightning
; magnetic reversal
; particle motion
; polarization
; solar activity
; solar system
; solar wind
; thunderstorm
; weather modification
; United Kingdom
英文摘要: Lightning flash rates, RL, are modulated by corotating interaction regions (CIRs) and the polarity of the heliospheric magnetic field (HMF) in near-Earth space. As the HMF polarity reverses at the heliospheric current sheet (HCS), typically within a CIR, these phenomena are likely related. In this study, RL is found to be significantly enhanced at the HCS and at 27 days prior/after. The strength of the enhancement depends on the polarity of the HMF reversal at the HCS. Near-Earth solar and galactic energetic particle fluxes are also ordered by HMF polarity, though the variations qualitatively differ from RL, with the main increase occurring prior to the HCS crossing. Thus, the CIR effect on lightning is either the result of compression/amplification of the HMF (and its subsequent interaction with the terrestrial system) or that energetic particle preconditioning of the Earth system prior to the HMF polarity change is central to solar wind lightning coupling mechanism. Key Points UK lightning is enhanced when the Earth intersects the heliospheric current sheet Lightning rates depend on the polarity of the heliospheric magnetic field Associated changes in the energetic particle populations are complex. ©2015. The Authors. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84956925428&doi=10.1002%2f2015GL066802&partnerID=40&md5=a0f95c082ac4082e9a1b9d15a5db0922
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/8027
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Space and Atmospheric Electricity Group, Department of Meteorology, University of Reading, Reading, United Kingdom
Recommended Citation:
Owens M.J.,Scott C.J.,Bennett A.J.,et al. Lightning as a space-weather hazard: UK thunderstorm activity modulated by the passage of the heliospheric current sheet[J]. Geophysical Research Letters,2015-01-01,42(22).