Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2016GL072063 |
Is diffuse aurora driven from above or below? | |
Khazanov, G. V.; Sibeck, D. G.; Zesta, E. | |
2017-01-28 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2017 |
卷号 | 44期号:2 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | In the diffuse aurora, magnetospheric electrons, initially precipitated from the inner plasma sheet via wave-particle interaction processes, degrade in the atmosphere toward lower energies, and produce secondary electrons via impact ionization of the neutral atmosphere. These initially precipitating electrons of magnetospheric origin can also be additionally reflected back into the magnetosphere, leading to a series of multiple reflections by the two magnetically conjugate atmospheres that can greatly impact the initially precipitating flux at the upper ionospheric boundary (700-800km). The resultant population of secondary and primary electrons cascades toward lower energies and escape back to the magnetosphere. Escaping upward electrons traveling from the ionosphere can be trapped in the magnetosphere, as they travel inside the loss cone, via Coulomb collisions with the cold plasma, or by interactions with various plasma waves. Even though this scenario is intuitively transparent, this magnetosphere-ionosphere coupling element is not considered in any of the existing diffuse aurora research. Nevertheless, as we demonstrate in this letter, this process has the potential to dramatically affect the formation of electron precipitated fluxes in the regions of diffuse auroras. |
英文关键词 | diffuse aurora magnetosphere-ionosphere coupling electron precipitation |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000395652600005 |
WOS关键词 | ELECTRON-TRANSPORT ; MAGNETOSPHERE ; PRECIPITATION ; WAVES ; PLASMASPHERE ; ATMOSPHERE ; EMISSIONS ; REGIONS ; MODEL |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/28108 |
专题 | 气候变化 |
作者单位 | NASA, GSFC, Greenbelt, MD 20771 USA |
推荐引用方式 GB/T 7714 | Khazanov, G. V.,Sibeck, D. G.,Zesta, E.. Is diffuse aurora driven from above or below?[J]. GEOPHYSICAL RESEARCH LETTERS,2017,44(2). |
APA | Khazanov, G. V.,Sibeck, D. G.,&Zesta, E..(2017).Is diffuse aurora driven from above or below?.GEOPHYSICAL RESEARCH LETTERS,44(2). |
MLA | Khazanov, G. V.,et al."Is diffuse aurora driven from above or below?".GEOPHYSICAL RESEARCH LETTERS 44.2(2017). |
条目包含的文件 | 条目无相关文件。 |
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