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DOI | 10.1002/2018GL077183 |
Does a Local B-Minimum Appear in the Tail Current Sheet During a Substorm Growth Phase? | |
Sergeev, V. A.1; Gordeev, E. I.1; Merkin, V. G.2; Sitnov, M. I.2 | |
2018-03-28 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2018 |
卷号 | 45期号:6页码:2566-2573 |
文章类型 | Article |
语种 | 英语 |
国家 | Russia; USA |
英文摘要 | Magnetic configurations with dBz/dr > 0 in the midtail current sheet are potentially unstable to various instabilities associated with the explosive substorm onset. Their existence is hard to confirm with observations of magnetospheric spacecraft. Here we use remote sensing by low-altitude spacecraft that measured the loss cone filling rate during electron-rich solar particle event, providing information about magnetic properties of the tail current sheet. We found a latitudinally localized anisotropic 30 keV electron loss cone region embedded inside an extended region of isotropic solar electron precipitation. It was persistently observed for more than 0.5 h during isolated growth phase event by six Polar Operational Environmental Satellites spacecraft, which crossed the premidnight auroral oval. The embedded anisotropic region was observed 1 degrees poleward of the outer radiation belt boundary over 4-5 h wide magnetic local time sector, suggesting a persistent ridge-type Bz(2)/j maximum in the equatorial plasma sheet at distances 15-20 R-E. We discuss infrequent observations of such events taking into account recent results of global magnetohydrodynamic simulations. |
英文关键词 | tail current sheet stability energetic particle precipitation remote sensing substorm growth phase solar electrons |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000430106000001 |
WOS关键词 | STEADY MAGNETOSPHERIC CONVECTION ; PLASMA SHEET ; MAGNETOTAIL ; BOUNDARY ; PRECIPITATION ; MODEL ; B2I |
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/26767 |
专题 | 气候变化 |
作者单位 | 1.St Petersburg State Univ, Earths Phys Dept, St Petersburg, Russia; 2.Johns Hopkins Univ, Appl Phys Lab, Laurel, MD USA |
推荐引用方式 GB/T 7714 | Sergeev, V. A.,Gordeev, E. I.,Merkin, V. G.,et al. Does a Local B-Minimum Appear in the Tail Current Sheet During a Substorm Growth Phase?[J]. GEOPHYSICAL RESEARCH LETTERS,2018,45(6):2566-2573. |
APA | Sergeev, V. A.,Gordeev, E. I.,Merkin, V. G.,&Sitnov, M. I..(2018).Does a Local B-Minimum Appear in the Tail Current Sheet During a Substorm Growth Phase?.GEOPHYSICAL RESEARCH LETTERS,45(6),2566-2573. |
MLA | Sergeev, V. A.,et al."Does a Local B-Minimum Appear in the Tail Current Sheet During a Substorm Growth Phase?".GEOPHYSICAL RESEARCH LETTERS 45.6(2018):2566-2573. |
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