DOI: 10.1002/2014GL061952
论文题名: Turbulent plasma transport across the Earth's low-latitude boundary layer
作者: Nakamura T.K.M. ; Daughton W.
刊名: Geophysical Research Letters
ISSN: 0094-9449
EISSN: 1944-9180
出版年: 2014
卷: 41, 期: 24 起始页码: 8704
结束页码: 8712
语种: 英语
英文关键词: CDPS
; Kelvin-Helmholtz
; LLBL
; magnetic reconnection
; Rayleigh-Taylor
; turbulence
Scopus关键词: Atmospheric thermodynamics
; Boundary layers
; Kinetics
; Magnetosphere
; Plasma diagnostics
; Plasma sheaths
; Plasma simulation
; Plasma stability
; Plasma turbulence
; Solar wind
; Turbulence
; Vortex flow
; CDPS
; Kelvin-Helmholtz
; LLBL
; Magnetic reconnections
; Rayleigh-Taylor
; Magnetoplasma
; boundary layer
; Kelvin-Helmholtz instability
; magnetic field
; magnetopause
; magnetosphere
; plasma
; simulation
; solar wind
; three-dimensional modeling
; turbulence
; turbulent flow
; vorticity
英文摘要: The Kelvin-Helmholtz instability is a key process for the transport of solar wind plasma into the Earth's magnetosphere when the interplanetary magnetic field (IMF) is northward. Previous kinetic simulations for symmetric layers have demonstrated that the flow vortices compress the magnetopause current layer and induce magnetic reconnection, leading to the rapid streaming of solar wind plasma into the vortices along newly reconnected field lines. Using fully kinetic 3-D simulations, we demonstrate that the inherent density asymmetry across the boundary layer leads to a spectrum of oblique interchange instabilities along the magnetospheric side of the vortices. These secondary instabilities give rise to turbulence, which transports the solar wind plasma originally stored within the flow vortices deep into the magnetosphere. Simple estimates suggest that this turbulent transport may contribute significantly to the formation of the Earth's low-latitude boundary layer and the cold-dense plasma sheet during prolonged periods of northward IMF. Key PointsWe performed 3-D fully kinetic simulations modeling the Earth's magnetopauseThe KH instability drives turbulence leading to efficient solar wind transportThe estimated transport rate explains the formation of the LLBL and CDPS ©2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84921756679&doi=10.1002%2f2014GL061952&partnerID=40&md5=9eafe94735f84e5d6715c57fa571277d
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/6713
Appears in Collections: 气候减缓与适应
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作者单位: Computational Physics Division, Los Alamos National Laboratory, Los Alamos, NM, United States
Recommended Citation:
Nakamura T.K.M.,Daughton W.. Turbulent plasma transport across the Earth's low-latitude boundary layer[J]. Geophysical Research Letters,2014-01-01,41(24).