DOI: 10.1002/2013GL058861
论文题名: Observation of local and conjugate ionospheric perturbations from individual oceanic lightning flashes
作者: Gołkowski M. ; Gross N.C. ; Moore R.C. ; Cotts B.R.T. ; Mitchell M.
刊名: Geophysical Research Letters
ISSN: 0094-10443
EISSN: 1944-10174
出版年: 2014
卷: 41, 期: 2 起始页码: 273
结束页码: 279
语种: 英语
英文关键词: early VLF events
; ionospheric disturbances
; LEP events
; lightning
; VLF remote sensing
Scopus关键词: Electromagnetic pulse
; Geomagnetism
; Magnetosphere
; Remote sensing
; Spectral density
; early VLF events
; Early VLF perturbation
; Electron precipitation
; Geomagnetic conditions
; Ionospheric disturbance
; Ionospheric perturbation
; LEP events
; Lightning electromagnetic pulse
; Lightning
; atmospheric electricity
; electromagnetic wave
; electron
; ionosphere
; lightning
; marine atmosphere
; peak discharge
; perturbation
; remote sensing
; spectral analysis
英文摘要: Very low frequency (VLF) remote sensing observations of multifaceted local and conjugate ionospheric perturbations from geographically identified and well-characterized oceanic lightning discharges are presented for the first time. Lightning-induced electron precipitation (LEP) events are shown to produce disturbances first in the conjugate hemisphere and subsequently in the hemisphere of the causative lightning discharge in agreement with theoretical predictions. A rough threshold peak current of ∼100 kA is identified for lightning discharges to generate LEP events for the geomagnetic conditions present during observations. The occurrence of early VLF events and the subsequent duration of their recovery do not seem to fit any simple metric of lightning discharge peak current or proximity to great circle path. Knowledge of the full spectral density of the lightning electromagnetic pulse, not just its peak current, and the subionospheric mode structure are likely necessary to determine if a specific lightning discharge will generate an early VLF perturbation. ©2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84893179997&doi=10.1002%2f2013GL058861&partnerID=40&md5=7751170aaaea5e0afc8ef9617b487511
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7707
Appears in Collections: 气候减缓与适应
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作者单位: Department of Electrical Engineering, University of Colorado Denver, Denver, CO, United States
Recommended Citation:
Gołkowski M.,Gross N.C.,Moore R.C.,et al. Observation of local and conjugate ionospheric perturbations from individual oceanic lightning flashes[J]. Geophysical Research Letters,2014-01-01,41(2).