DOI: 10.1029/2018JA025622
Scopus记录号: 2-s2.0-85052637842
论文题名: ULF Electromagnetic Field in the Upper Ionosphere Excited by Lightning
作者: Mazur N.G. ; Fedorov E.N. ; Pilipenko V.A. ; Vakhnina V.V.
刊名: Journal of Geophysical Research: Space Physics
ISSN: 21699380
出版年: 2018
卷: 123, 期: 8 起始页码: 6692
结束页码: 6702
语种: 英语
英文关键词: atmosphere-ionosphere coupling
; ionospheric Alfvén resonator
; lightning
; ULF pulsations
英文摘要: We examine excitation of ultralow frequency (ULF) electromagnetic waves by an atmospheric lightning stroke in the upper ionosphere and the role of the ionospheric Alfvén resonator (IAR) in this process. We have theoretically calculated with the developed numerical model the spatial and spectral structures of electromagnetic disturbance in the ULF frequency range 0.1–6.0 Hz excited by an atmospheric lightning stroke on the ground and at ionospheric altitudes. The frequency band under consideration comprises typical frequencies of the IAR and the ionospheric waveguide. The spectra of horizontal magnetic and electric components reveal a spectral multiband structure in the upper ionosphere. The form of spectra depends significantly on the horizontal distance ρ from the source: spectral peaks associated with the IAR are evident at ρ≤400 km, whereas at ρ≥1,000 km the spectral peaks (>4 Hz) corresponding to the ionospheric waveguide modes can be seen. The model predicts that a vertical electric discharge with the charge moment MQ=106 C·m produces at altitude 500 km and ρ = 40 km a pulse with electric and magnetic amplitudes of about 4 mV/m and 4 nT, correspondingly, and duration ∼0.2 s. The pulse amplitude decays rather slowly with distance (Formula presented.). Detection of ULF response in the upper ionosphere to isolated intense lightning stroke by low-orbiting satellites with magnetic or electric sensors onboard is quite feasible. ©2018. 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/113367
Appears in Collections: 气候减缓与适应
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作者单位: Institute of Physics of the Earth, Moscow, Russian Federation; Space Research Institute, Moscow, Russian Federation; Institute of Energetics and Electrotechnics, Togliatti State University, Tolyatti, Russian Federation
Recommended Citation:
Mazur N.G.,Fedorov E.N.,Pilipenko V.A.,et al. ULF Electromagnetic Field in the Upper Ionosphere Excited by Lightning[J]. Journal of Geophysical Research: Space Physics,2018-01-01,123(8)