Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2018GL079715 |
Unstable Eigenmodes of the Feedback Instability With Collision-Induced Velocity Shear | |
Watanabe, T. -H.; Maeyama, S. | |
2018-10-16 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS
![]() |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2018 |
卷号 | 45期号:19页码:10043-10049 |
文章类型 | Article |
语种 | 英语 |
国家 | Japan |
英文摘要 | A linear eigenmode analysis of the magnetosphere-ionosphere coupling shows that the feedback instability leading to spontaneous formation of auroral arc structures remains unstable even in a case with strong vertical shear of horizontal ion flows induced by ion-neutral collisions in the E layer. For low-order Alfven harmonics, the linear frequency and growth rate obtained by means of a height-resolved model of the ionosphere are comparable to those resulted from the height-integrated one, where fine vertical structures of the ionospheric density and magnetic field perturbations are well resolved in the former. The present result confirms validity of the height-integrated ionosphere model in the long parallel wavelength limit, as assumed in previous studies on the feedback instability. Plain Language Summary Spontaneous formation of auroral arcs can be explained in terms of a plasma instability in the magnetosphere-ionosphere coupling. The present study confirms validity and robustness of the basic instability theory even in cases with inhomogeneous profiles of the ionospheric parameters such as the ion-neutral collision. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000448656800002 |
WOS关键词 | IONOSPHERIC ALFVEN RESONATOR ; AURORAL ARCS ; MAGNETOSPHERE ; SIMULATION ; SYSTEM |
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/25922 |
专题 | 气候变化 |
作者单位 | Nagoya Univ, Dept Phys, Nagoya, Aichi, Japan |
推荐引用方式 GB/T 7714 | Watanabe, T. -H.,Maeyama, S.. Unstable Eigenmodes of the Feedback Instability With Collision-Induced Velocity Shear[J]. GEOPHYSICAL RESEARCH LETTERS,2018,45(19):10043-10049. |
APA | Watanabe, T. -H.,&Maeyama, S..(2018).Unstable Eigenmodes of the Feedback Instability With Collision-Induced Velocity Shear.GEOPHYSICAL RESEARCH LETTERS,45(19),10043-10049. |
MLA | Watanabe, T. -H.,et al."Unstable Eigenmodes of the Feedback Instability With Collision-Induced Velocity Shear".GEOPHYSICAL RESEARCH LETTERS 45.19(2018):10043-10049. |
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