DOI: 10.1002/2013GL058948
论文题名: Alternative interpretation of results from Kelvin-Helmholtz vortex identification criteria
作者: Plaschke F. ; Taylor M.G.G.T. ; Nakamura R.
刊名: Geophysical Research Letters
ISSN: 0094-10484
EISSN: 1944-10215
出版年: 2014
卷: 41, 期: 2 起始页码: 244
结束页码: 250
语种: 英语
英文关键词: Kelvin-Helmholtz
; magnetopause
; surface wave
; vortex identification
Scopus关键词: Magnetopause
; Spacecraft
; Surface waves
; Vortex flow
; Vorticity
; Depletion layer
; Kelvin-Helmholtz
; Kelvin-helmholtz instabilities
; Kelvin-helmholtz vortices
; Low latitude boundary layer
; Magnetosheath flow
; Plasma velocity
; Vortex identifications
; Plasmas
; boundary layer
; Kelvin-Helmholtz instability
; magnetopause
; surface wave
; vortex
; vorticity
英文摘要: Observations of lower density, faster than sheath (LDFTS) plasma at the magnetopause are believed to be specific to rolled-up vortices generated by the Kelvin-Helmholtz instability. Hence, they are used to identify vortices with single-spacecraft measurements. These vortices are expected to occur at the tail-flank magnetopause, beyond the terminator. This fact contrasts with numerous observations of LDFTS plasma far sunward of the terminator. Here we present two alternative explanations for the detection of LDFTS plasma at the dayside magnetopause: (1) the presence of a plasma depletion layer (PDL) readily featuring LDFTS plasma and (2) the plasma velocity pattern of magnetopause surface waves, by which lower/higher-density magnetosheath or PDL plasmas sensed by a wave-observing spacecraft are accelerated/decelerated in magnetosheath flow direction. Even low-latitude boundary layer (LLBL) plasma may be of LDFTS, if the LLBL background flow is antisunward at near-magnetosheath velocities. ©2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84892656357&doi=10.1002%2f2013GL058948&partnerID=40&md5=f8748e7903766b40902fc56cd0dc89d7
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7748
Appears in Collections: 气候减缓与适应
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作者单位: Space Research Institute, Austrian Academy of Sciences, Graz, Austria
Recommended Citation:
Plaschke F.,Taylor M.G.G.T.,Nakamura R.. Alternative interpretation of results from Kelvin-Helmholtz vortex identification criteria[J]. Geophysical Research Letters,2014-01-01,41(2).