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DOI | 10.1002/2018GL076993 |
c Magnetic Reconnection, Turbulence, and Particle Acceleration: Observations in the Earth's Magnetotail | |
Ergun, R. E.1,2; Goodrich, K. A.2; Wilder, F. D.2; Ahmadi, N.2; Holmes, J. C.1,2; Eriksson, S.2; Stawarz, J. E.3; Nakamura, R.4; Genestreti, K. J.4; Hesse, M.5; Burch, J. L.6; Torbert, R. B.6,7; Phan, T. D.8; Schwartz, S. J.2; Eastwood, J. P.3; Strangeway, R. J.9; Le Contel, O.10; Russell, C. T.9; Argall, M. R.7; Lindqvist, P. -A.11; Chen, L. J.12,13; Cassak, P. A.14; Giles, B. L.12; Dorelli, J. C.12; Gershman, D.14; Leonard, T. W.2; Lavraud, B.15,16; Retino, A.10; Matthaeus, W.17; Vaivads, A.18 | |
2018-04-28 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2018 |
卷号 | 45期号:8页码:3338-3347 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; England; Austria; Norway; France; Sweden |
英文摘要 | We report observations of turbulent dissipation and particle acceleration from large-amplitude electric fields (E) associated with strong magnetic field (B) fluctuations in the Earth's plasma sheet. The turbulence occurs in a region of depleted density with anti-earthward flows followed by earthward flows suggesting ongoing magnetic reconnection. In the turbulent region, ions and electrons have a significant increase in energy, occasionally > 100 keV, and strong variation. There are numerous occurrences of vertical bar E vertical bar > 100 mV/m including occurrences of large potentials (> 1 kV) parallel to B and occurrences with extraordinarily large J.E (J is current density). In this event, we find that the perpendicular contribution of J.E with frequencies near or below the ion cyclotron frequency (f(ci)) provide the majority net positive J.E. Large-amplitude parallel E events with frequencies above f(ci) to several times the lower hybrid frequency provide significant dissipation and can result in energetic electron acceleration. Plain Language Summary The Magnetospheric Multiscale mission is able to examine dissipation associated with magnetic reconnection with unprecedented accuracy and frequency response. The observations show that roughly 80% of the dissipation is from the perpendicular currents and electric fields. However, large-amplitude parallel electric fields appear to play a strong role in turbulent dissipation into electrons and in electron acceleration. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000435745500004 |
WOS关键词 | PARALLEL ELECTRIC-FIELDS ; CENTRAL PLASMA SHEET ; MAGNETOSPHERIC MULTISCALE ; SOLAR-WIND ; MMS ; LAYERS ; ONSET |
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/28755 |
专题 | 气候变化 |
作者单位 | 1.Univ Colorado, Dept Astrophys & Planetary Sci, Boulder, CO 80309 USA; 2.Univ Colorado, Lab Atmospher & Space Sci, Boulder, CO 80309 USA; 3.Imperial Coll London, Blackett Lab, London, England; 4.Austrian Acad Sci, Space Res Inst, Graz, Austria; 5.Univ Bergen, Dept Phys & Technol, Bergen, Norway; 6.Southwest Res Inst, San Antonio, TX USA; 7.Univ New Hampshire, Ctr Space Sci, Durham, NH 03824 USA; 8.Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA; 9.Univ Calif Los Angeles, Dept Earth Planetary & Space Sci, Los Angeles, CA USA; 10.Univ Paris Sud, Observ Paris, Sorbonne Univ, Lab Phys Plasmas,CNRS,Ecole Polytech, Paris, France; 11.Royal Inst Technol, Dept Space & Plasma Phys, Stockholm, Sweden; 12.NASA, Goddard Space Flight Ctr, Greenbelt, MD USA; 13.Univ Maryland, Dept Astron, College Pk, MD 20742 USA; 14.West Virginia Univ, Dept Phys & Astron, Morgantown, WV USA; 15.Univ Toulouse, Inst Rech Astrophys & Planetol, Toulouse, France; 16.CNRS, Toulouse, France; 17.Univ Delaware, Dept Phys & Astron, Newark, DE 19716 USA; 18.Swedish Inst Space Phys, Uppsala, Sweden |
推荐引用方式 GB/T 7714 | Ergun, R. E.,Goodrich, K. A.,Wilder, F. D.,et al. c Magnetic Reconnection, Turbulence, and Particle Acceleration: Observations in the Earth's Magnetotail[J]. GEOPHYSICAL RESEARCH LETTERS,2018,45(8):3338-3347. |
APA | Ergun, R. E..,Goodrich, K. A..,Wilder, F. D..,Ahmadi, N..,Holmes, J. C..,...&Vaivads, A..(2018).c Magnetic Reconnection, Turbulence, and Particle Acceleration: Observations in the Earth's Magnetotail.GEOPHYSICAL RESEARCH LETTERS,45(8),3338-3347. |
MLA | Ergun, R. E.,et al."c Magnetic Reconnection, Turbulence, and Particle Acceleration: Observations in the Earth's Magnetotail".GEOPHYSICAL RESEARCH LETTERS 45.8(2018):3338-3347. |
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