| DOI: | 10.1002/2015GL064913
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| 论文题名: | Numerical simulation of an elve modulated by a gravity wave |
| 作者: | Marshall R.A.; Yue J.; Lyons W.A.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-9622
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| EISSN: | 1944-9353
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| 出版年: | 2015
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| 卷: | 42, 期:14 | | 起始页码: | 6120
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| 结束页码: | 6127
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| 语种: | 英语
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| 英文关键词: | coupling
; elves
; gravity waves
; ionosphere
; lightning
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| Scopus关键词: | Couplings
; Electromagnetic pulse
; Finite difference time domain method
; Ionosphere
; Ionospheric measurement
; Lightning
; Elves
; Finite-difference time-domain modeling
; Lightning electromagnetic pulse
; Lower ionosphere
; Neutral densities
; Neutral density fluctuations
; Optical signatures
; Wave structures
; Gravity waves
; coupling
; finite difference method
; geometry
; gravity wave
; ionosphere
; lightning
; numerical model
; perturbation
; videography
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| 英文摘要: | Recent video observations have shown that elves - the visible manifestation of the lightning electromagnetic pulse (EMP) interacting with the lower ionosphere - can be modulated by neutral density fluctuations at lower ionosphere altitudes due to gravity waves. The elve emissions thus illuminate the gravity wave structure. Here we use a finite difference time domain (FDTD) model of the lightning EMP to simulate elve emissions in the presence of neutral density fluctuations representative of gravity waves. We show that observable elve striations can be generated by gravity waves with a neutral density perturbation of as low as 5% at elve altitudes near 85 km. Higher perturbations lead to more pronounced striations. The depth of the optical signature perturbation is found to be similar in magnitude to the neutral density perturbation at elve altitudes, although the relationship depends on viewing geometry, gravity wave geometry, and the elve-causative lightning peak current moment. © 2015. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84938972370&doi=10.1002%2f2015GL064913&partnerID=40&md5=6fcdaba44a91cdea80881da19bd077c1
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| Citation statistics: |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/9237
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| 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: | Department of Aeronautics and Astronautics, Stanford University, Stanford, CA, United States
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| Recommended Citation: | |
Marshall R.A.,Yue J.,Lyons W.A.. Numerical simulation of an elve modulated by a gravity wave[J]. Geophysical Research Letters,2015-01-01,42(14).
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