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DOI | 10.1002/2016GL071826 |
Statistical azimuthal structuring of the substorm onset arc: Implications for the onset mechanism | |
Kalmoni, N. M. E.1; Rae, I. J.1; Murphy, K. R.2; Forsyth, C.1; Watt, C. E. J.3; Owen, C. J.1 | |
2017-03-16 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS
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ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2017 |
卷号 | 44期号:5 |
文章类型 | Article |
语种 | 英语 |
国家 | England; USA |
英文摘要 | The onset of an auroral substorm is generally thought to occur on a quiet, homogeneous auroral arc. We present a statistical study of independently selected substorm onset arcs and find that over 90% of the arcs studied have resolvable characteristic spatial scales in the form of auroral beads. We find that the vast majority (similar to 88%) of auroral beads have small amplitudes relative to the background, making them invisible without quantitative analysis. This confirms that auroral beads are highly likely to be ubiquitous to all onset arcs, rather than a special case phenomena as previously thought. Moreover, as these auroral beads grow exponentially through onset, we conclude that a magnetospheric plasma instability is fundamental to substorm onset itself. |
英文关键词 | aurora waves instability beads rays vortices |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000398183700004 |
WOS关键词 | PLASMA INSTABILITIES ; AURORAL SUBSTORMS ; GROWTH ; ARRAY ; FIELD ; FUV |
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/29028 |
专题 | 气候变化 |
作者单位 | 1.Univ Coll London, Mullard Space Sci Lab, Dorking, Surrey, England; 2.NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA; 3.Univ Reading, Dept Meteorol, Reading, Berks, England |
推荐引用方式 GB/T 7714 | Kalmoni, N. M. E.,Rae, I. J.,Murphy, K. R.,et al. Statistical azimuthal structuring of the substorm onset arc: Implications for the onset mechanism[J]. GEOPHYSICAL RESEARCH LETTERS,2017,44(5). |
APA | Kalmoni, N. M. E.,Rae, I. J.,Murphy, K. R.,Forsyth, C.,Watt, C. E. J.,&Owen, C. J..(2017).Statistical azimuthal structuring of the substorm onset arc: Implications for the onset mechanism.GEOPHYSICAL RESEARCH LETTERS,44(5). |
MLA | Kalmoni, N. M. E.,et al."Statistical azimuthal structuring of the substorm onset arc: Implications for the onset mechanism".GEOPHYSICAL RESEARCH LETTERS 44.5(2017). |
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