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题名: Turbulent mass transfer caused by vortex induced reconnection in collisionless magnetospheric plasmas
作者: Nakamura, T. K. M.; Hasegawa, H.; Daughton, W.; Eriksson, S.; Li, W. Y.; Nakamura, R.
作者部门: 空间科学部
通讯作者: Nakamura, TKM (reprint author), Austrian Acad Sci, Space Res Inst, A-8010 Graz, Austria.
刊名: NATURE COMMUNICATIONS
ISSN号: 2041-1723
出版日期: 2017
卷号: 8, 页码:1582
收录类别: SCI
项目资助者: Austrian Research Fund (FWF) [I2016-N20] ; DOE Office of Science User Facility [DE-AC05-00OR22725] ; NASA [NNH13AV26I, NNX08AO84G] ; NASA MMS-Phase E
英文摘要: Magnetic reconnection is believed to be the main driver to transport solar wind into the Earth's magnetosphere when the magnetopause features a large magnetic shear. However, even when the magnetic shear is too small for spontaneous reconnection, the Kelvin-Helmholtz instability driven by a super-Alfvenic velocity shear is expected to facilitate the transport. Although previous kinetic simulations have demonstrated that the non-linear vortex flows from the Kelvin-Helmholtz instability gives rise to vortex-induced reconnection and resulting plasma transport, the system sizes of these simulations were too small to allow the reconnection to evolve much beyond the electron scale as recently observed by the Magnetospheric Multiscale (MMS) spacecraft. Here, based on a large-scale kinetic simulation and its comparison with MMS observations, we show for the first time that ion-scale jets from vortex-induced reconnection rapidly decay through self-generated turbulence, leading to a mass transfer rate nearly one order higher than previous expectations for the Kelvin-Helmholtz instability.
语种: 英语
内容类型: 期刊论文
URI标识: http://ir.nssc.ac.cn/handle/122/6139
Appears in Collections:空间科学部_期刊论文

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