Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2017GL076051 |
Alfvenic Dynamics and Fine Structuring of Discrete Auroral Arcs: Swarm and e-POP Observations | |
Miles, D. M.1,2; Mann, I. R.2; Pakhotin, I. P.2; Burchill, J. K.3; Howarth, A. D.3; Knudsen, D. J.3; Lysak, R. L.4; Wallis, D. D.3,5; Cogger, L. L.3; Yau, A. W.3 | |
2018-01-28 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2018 |
卷号 | 45期号:2页码:545-555 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; Canada |
英文摘要 | The electrodynamics associated with dual discrete arc aurora with antiparallel flow along the arcs were observed nearly simultaneously by the enhanced Polar Outflow Probe (e-POP) and the Swarm A and C spacecraft. Auroral imaging from e-POP reveals 1-10 km structuring of the arcs, which move and evolve on second timescales and confound the traditional single-spacecraft field-aligned current algorithms. High-cadence magnetic data from e-POP show 1-10 Hz, inferred Alfvenic, perturbations coincident with and at the same scale size as the observed dynamic auroral fine structures. High-cadence electric and magnetic field data from Swarm A reveal nonstationary electrodynamics involving reflected and interfering Alfven waves and modulation consistent with trapping in the ionospheric Alfven resonator (IAR). These observations suggest a role for Alfven waves, perhaps also the IAR, in discrete arc dynamics on 0.2-10 s timescales and similar to 1-10 km spatial scales and reinforce the importance of considering Alfven waves in magnetosphere-ionosphere coupling. |
英文关键词 | aurora Alfven wave field-aligned current Swarm e-POP ionospheric Alfven resonator |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000425514300008 |
WOS关键词 | FIELD-ALIGNED CURRENTS ; FREJA SATELLITE ; WAVES ; MISSION ; CONSTELLATION ; CONDUCTIVITY ; IONOSPHERE ; RESONATOR ; INSTABILITY ; SPACECRAFT |
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/26360 |
专题 | 气候变化 |
作者单位 | 1.Univ Iowa, Dept Phys & Astron, Iowa City, IA 52242 USA; 2.Univ Alberta, Dept Phys, Edmonton, AB, Canada; 3.Univ Calgary, Dept Phys & Astron, Calgary, AB, Canada; 4.Univ Minnesota, Sch Phys & Astron, Minneapolis, MN 55455 USA; 5.Magnametrics, Ottawa, ON, Canada |
推荐引用方式 GB/T 7714 | Miles, D. M.,Mann, I. R.,Pakhotin, I. P.,et al. Alfvenic Dynamics and Fine Structuring of Discrete Auroral Arcs: Swarm and e-POP Observations[J]. GEOPHYSICAL RESEARCH LETTERS,2018,45(2):545-555. |
APA | Miles, D. M..,Mann, I. R..,Pakhotin, I. P..,Burchill, J. K..,Howarth, A. D..,...&Yau, A. W..(2018).Alfvenic Dynamics and Fine Structuring of Discrete Auroral Arcs: Swarm and e-POP Observations.GEOPHYSICAL RESEARCH LETTERS,45(2),545-555. |
MLA | Miles, D. M.,et al."Alfvenic Dynamics and Fine Structuring of Discrete Auroral Arcs: Swarm and e-POP Observations".GEOPHYSICAL RESEARCH LETTERS 45.2(2018):545-555. |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论