Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2018GL077874 |
Kinetic Dissipation Around a Dipolarization Front | |
Sitnov, M. I.1; Merkin, V. G.1; Roytershteyn, V.2; Swisdak, M.3 | |
2018-05-28 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS
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ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2018 |
卷号 | 45期号:10页码:4639-4647 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Kinetic aspects of energy conversion and dissipation near a dipolarization front (DF) in the magnetotail are considered using fully kinetic 3-D particle-in-cell simulations. The energy conversion is described in terms of the pressure dilatation, as well as the double contraction of deviatoric pressure tensor and traceless strain rate tensor, also known as the Pi-D parameter in turbulence studies. It is shown that in contrast to the fluid dissipation measure, the Joule heating rate, which cannot distinguish between ion and electron dissipation and reveals deep negative dips at the DF, the Pi-D parameters, as kinetic analogs of the Joule heating rate, are largely positive and drastically different for ions and electrons. Further analysis of these parameters suggests that ions are heated at and ahead of the DF due to their reflection from the front, while electrons are heated at and behind the DF due to the long-wavelength lower-hybrid drift instability. |
英文关键词 | dipolarization front magnetotail Landau dissipation magnetic reconnection |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000435262000013 |
WOS关键词 | HYBRID-DRIFT INSTABILITY ; ENERGY-CONVERSION ; MAGNETIC RECONNECTION ; ONSET ; DYNAMICS |
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/29105 |
专题 | 气候变化 |
作者单位 | 1.Johns Hopkins Univ, Appl Phys Lab, Johns Hopkins Rd, Laurel, MD 20723 USA; 2.Space Sci Inst, Boulder, CO USA; 3.Univ Maryland, Inst Res Elect & Appl Phys, College Pk, MD 20742 USA |
推荐引用方式 GB/T 7714 | Sitnov, M. I.,Merkin, V. G.,Roytershteyn, V.,et al. Kinetic Dissipation Around a Dipolarization Front[J]. GEOPHYSICAL RESEARCH LETTERS,2018,45(10):4639-4647. |
APA | Sitnov, M. I.,Merkin, V. G.,Roytershteyn, V.,&Swisdak, M..(2018).Kinetic Dissipation Around a Dipolarization Front.GEOPHYSICAL RESEARCH LETTERS,45(10),4639-4647. |
MLA | Sitnov, M. I.,et al."Kinetic Dissipation Around a Dipolarization Front".GEOPHYSICAL RESEARCH LETTERS 45.10(2018):4639-4647. |
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