Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2017GL073031 |
Local time asymmetry of Saturn's magnetosheath flows | |
Burkholder, B.1; Delamere, P. A.1; Ma, X.1; Thomsen, M. F.2; Wilson, R. J.3; Bagenal, F.3 | |
2017-06-28 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2017 |
卷号 | 44期号:12 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Using gross averages of the azimuthal component of flow in Saturn's magnetosheath, we find that flows in the prenoon sector reach a maximum value of roughly half that of the postnoon side. Corotational magnetodisc plasma creates a much larger flow shear with solar wind plasma prenoon than postnoon. Maxwell stress tensor analysis shows that momentum can be transferred out of the magnetosphere along tangential field lines if a normal component to the boundary is present, i.e., field lines which pierce the magnetopause. A Kelvin-Helmholtz unstable flow gives rise to precisely this situation, as intermittent reconnection allows the magnetic field to thread the boundary. We interpret the Kelvin-Helmholtz instability acting along the magnetopause as a tangetial drag, facilitating two-way transport of momentum through the boundary. We use reduced magnetosheath flows in the dawn sector as evidence of the importance of this interaction in Saturn's magnetosphere. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000405854200001 |
WOS关键词 | INTERACTION OFMAGNETIC RECONNECTION ; KELVIN-HELMHOLTZ VORTICES ; SOLAR-WIND ; GIANT MAGNETOSPHERES ; EARTHS MAGNETOSPHERE ; VISCOUS INTERACTION ; MAGNETOPAUSE ; TRANSPORT ; PLASMA ; TRIGGER |
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/25711 |
专题 | 气候变化 |
作者单位 | 1.Univ Alaska Fairbanks, Geophys Inst, Fairbanks, AK 99775 USA; 2.Planetary Sci Inst, Tucson, AZ USA; 3.Univ Colorado, Lab Atmospher & Space Phys, Boulder, CO 80309 USA |
推荐引用方式 GB/T 7714 | Burkholder, B.,Delamere, P. A.,Ma, X.,et al. Local time asymmetry of Saturn's magnetosheath flows[J]. GEOPHYSICAL RESEARCH LETTERS,2017,44(12). |
APA | Burkholder, B.,Delamere, P. A.,Ma, X.,Thomsen, M. F.,Wilson, R. J.,&Bagenal, F..(2017).Local time asymmetry of Saturn's magnetosheath flows.GEOPHYSICAL RESEARCH LETTERS,44(12). |
MLA | Burkholder, B.,et al."Local time asymmetry of Saturn's magnetosheath flows".GEOPHYSICAL RESEARCH LETTERS 44.12(2017). |
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