Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2019GL086318 |
Filamentary Currents and Alfvenic Vortices in the Inner Magnetosphere | |
Chaston, C. C.1; Bonnell, J. W.1; Wygant, J. R.2; Reeves, G. D.3; Baker, D. N.4 | |
2020-02-28 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2020 |
卷号 | 47期号:4 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | We show that broadband low-frequency Alfvenic field variations observed in the inner-magnetosphere from the Van Allen Probes during geomagnetically disturbed intervals are composed of multiscale current sheets, current filaments, flow shears, and vortices. These observations pertain to spacecraft frame frequencies (f(sc)) over the range 0.1 < f(sc) < 10 Hz and correspond to structure advected over the spacecraft on scales (lambda) over the range 0.1 less than or similar to lambda/rho(i) less than or similar to 10. where rho(i) is the average ion gyroradius. The topology of the current and flow is derived via time domain and spectral approaches adapted for the interpretation of advected structure. The results reveal the action of magnetic and convective nonlinearities in the generation of broadband Alfvenic fluctuations prevalent in the inner magnetosphere during active times. The observed current filamentation and rotational vorticity is suggestive of how broadband Alfvenic field variations on kinetic scales are driven and support geophysically significant particle acceleration in the inner magnetosphere. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000529120100051 |
WOS关键词 | WAVES ; EVOLUTION |
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/279729 |
专题 | 气候变化 |
作者单位 | 1.Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA; 2.Univ Minnesota, Dept Phys & Astron, Minneapolis, MN 55455 USA; 3.Los Alamos Natl Lab, Los Alamos, NM USA; 4.Univ Colorado, Lab Atmospher & Space Phys, Boulder, CO 80309 USA |
推荐引用方式 GB/T 7714 | Chaston, C. C.,Bonnell, J. W.,Wygant, J. R.,et al. Filamentary Currents and Alfvenic Vortices in the Inner Magnetosphere[J]. GEOPHYSICAL RESEARCH LETTERS,2020,47(4). |
APA | Chaston, C. C.,Bonnell, J. W.,Wygant, J. R.,Reeves, G. D.,&Baker, D. N..(2020).Filamentary Currents and Alfvenic Vortices in the Inner Magnetosphere.GEOPHYSICAL RESEARCH LETTERS,47(4). |
MLA | Chaston, C. C.,et al."Filamentary Currents and Alfvenic Vortices in the Inner Magnetosphere".GEOPHYSICAL RESEARCH LETTERS 47.4(2020). |
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