| DOI: | 10.1002/2013GL059164
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| 论文题名: | Infrasonic acoustic waves generated by fast air heating in sprite cores |
| 作者: | Da Silva C.L.; Pasko V.P.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-10335
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| EISSN: | 1944-10066
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| 出版年: | 2014
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| 卷: | 41, 期:5 | | 起始页码: | 1789
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| 结束页码: | 1795
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| 语种: | 英语
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| 英文关键词: | fast heating
; infrasound
; lightning
; sprite
; streamer
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| Scopus关键词: | Acoustic waves
; Energy transfer
; Lightning
; Chemical process
; Electrical current
; Excited electronic state
; Infrasound
; Pressure perturbation
; sprite
; Sprite streamer
; streamer
; Acoustics
; acoustic wave
; amplitude
; atmospheric electricity
; gas flow
; infrasonics
; plasma
; wave generation
|
| 英文摘要: | Acceleration, expansion, and branching of sprite streamers can lead to concentration of high electrical currents in regions of space, that are observed in the form of bright sprite cores. Driven by this electrical current, a series of chemical processes take place in the sprite plasma. Excitation, followed by quenching of excited electronic states leads to energy transfer from charged to neutral species. The consequence is heating and expansion of air leading to emission of infrasonic acoustic waves. Results indicate that ≳0.01 Pa pressure perturbations on the ground, observed in association with sprites, can only be produced by exceptionally strong currents in sprite cores, exceeding 2 kA. Key Points Coupling of plasma and neutral gas dynamics in sprites Mechanism of infrasound radiation from sprites Dependence of infrasound amplitudes on sprite currents ©2014. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84895680628&doi=10.1002%2f2013GL059164&partnerID=40&md5=167c6e8c6694a745ec86fd87f89d8b62
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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/7599
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| Appears in Collections: | 气候减缓与适应
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作者单位: | CSSL Laboratory, Pennsylvania State University, University Park PA, United States
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| Recommended Citation: | |
Da Silva C.L.,Pasko V.P.. Infrasonic acoustic waves generated by fast air heating in sprite cores[J]. Geophysical Research Letters,2014-01-01,41(5).
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