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DOI | 10.1029/2020GL087574 |
Decay of Kelvin-Helmholtz Vortices at the Earth's Magnetopause Under Pure Southward IMF Conditions | |
Nakamura, T. K. M.1; Plaschke, F.1; Hasegawa, H.2; Liu, Y. H.3; Hwang, K. J.4; Blasl, K. A.1,5; Nakamura, R.1 | |
2020-06-15 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2020 |
卷号 | 47期号:13 |
文章类型 | Article |
语种 | 英语 |
国家 | Austria; Japan; USA |
英文摘要 | At the Earth's low-latitude magnetopause, clear signatures of the Kelvin-Helmholtz (KH) waves have been frequently observed during periods of the northward interplanetary magnetic field (IMF), whereas these signatures have been much less frequently observed during the southward IMF. Here, we performed the first 3-D fully kinetic simulation of the magnetopause KH instability under the southward IMF condition. The simulation demonstrates that fast magnetic reconnection is induced at multiple locations along the vortex edge in an early nonlinear growth phase of the instability. The reconnection outflow jets significantly disrupt the flow of the nonlinear KH vortex, while the disrupted turbulent flow strongly bends and twists the reconnected field lines. The resulting coupling of the complex field and flow patterns within the magnetopause boundary layer leads to a quick decay of the vortex structure, which may explain the difference in the observation probability of KH waves between northward and southward IMF conditions. |
英文关键词 | Kelvin-Helmholtz instability magnetic reconnection magnetopause southward IMF PIC simulation turbulence |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000551465400030 |
WOS关键词 | MAGNETIC RECONNECTION ; INSTABILITY ; TRANSPORT ; BOUNDARY |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
URL | 查看原文 |
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/276643 |
专题 | 气候变化 |
作者单位 | 1.Austrian Acad Sci, Space Res Inst, Graz, Austria; 2.Japan Aerosp Explorat Agcy, Inst Space & Astronaut Sci, Sagamihara, Kanagawa, Japan; 3.Dartmouth Coll, Dept Phys & Astron, Hanover, NH 03755 USA; 4.Southwest Res Inst, San Antonio, TX USA; 5.Karl Franzens Univ Graz, Inst Phys, Graz, Austria |
推荐引用方式 GB/T 7714 | Nakamura, T. K. M.,Plaschke, F.,Hasegawa, H.,et al. Decay of Kelvin-Helmholtz Vortices at the Earth's Magnetopause Under Pure Southward IMF Conditions[J]. GEOPHYSICAL RESEARCH LETTERS,2020,47(13). |
APA | Nakamura, T. K. M..,Plaschke, F..,Hasegawa, H..,Liu, Y. H..,Hwang, K. J..,...&Nakamura, R..(2020).Decay of Kelvin-Helmholtz Vortices at the Earth's Magnetopause Under Pure Southward IMF Conditions.GEOPHYSICAL RESEARCH LETTERS,47(13). |
MLA | Nakamura, T. K. M.,et al."Decay of Kelvin-Helmholtz Vortices at the Earth's Magnetopause Under Pure Southward IMF Conditions".GEOPHYSICAL RESEARCH LETTERS 47.13(2020). |
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