DOI: 10.1002/2014GL060589
论文题名: Kelvin-Helmholtz vortices observed by THEMIS at the duskside of the magnetopause under southward interplanetary magnetic field
作者: Yan G.Q. ; Mozer F.S. ; Shen C. ; Chen T. ; Parks G.K. ; Cai C.L. ; McFadden J.P.
刊名: Geophysical Research Letters
ISSN: 0094-9987
EISSN: 1944-9718
出版年: 2014
卷: 41, 期: 13 起始页码: 4427
结束页码: 4434
语种: 英语
英文关键词: Induced Electric field
; Kevin-Helmholtz vortices
; Low-latitude Boundary Layer
Scopus关键词: Electric fields
; Magnetic fields
; Magnetopause
; Shear flow
; Spacecraft
; Vorticity
; Induced electric fields
; Interplanetary magnetic fields
; Kelvin-helmholtz instabilities
; Kelvin-helmholtz vortices
; Low latitude boundary layer
; Magnetic field compression
; Magnetopause crossings
; Simultaneous observation
; Vortex flow
; boundary layer
; electric field
; interplanetary dust
; Kelvin-Helmholtz instability
; magnetic field
; magnetopause
; spacecraft
; vortex
英文摘要: The Time History of Events and Macroscale Interactions during Substorms (THEMIS) observed several magnetopause crossings periodically at the duskside of magnetopause under southward interplanetary magnetic field (IMF), with significant sunward returning flows inside the magnetopause. The vortex features of the flows and the periodic enhancements in the calculated vorticity normal to the spacecraft plane could be found in the observation. The distortion of the magnetopause, the periodic features of vortex flows, the tailward propagation, and the evaluation of Kelvin-Helmholtz instability (KHI) condition support the evidence of the Kelvin-Helmholtz vortices produced by the velocity shear at the duskside of magnetopause. Based on three-point simultaneous observations of the flow, the vorticity was calculated to be about 0.15 s-1, similar to previous results. The tailward propagation of the vortices along the flank magnetopause was estimated to be about 292 km/s. The circular-induced electric field of several mV/m was deduced perpendicular to the magnetic field when the magnetic field compression occurred at the edges of the vortices. Key Points K-H vortices observation under southward IMF Calculated vorticity normal to the spacecraft plain, and propagation estimate Circular induced electric field at the edges of the vortices perpendicular to B ©2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84928410436&doi=10.1002%2f2014GL060589&partnerID=40&md5=019ebb8e72f48bdf72e8d063f4515eef
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7251
Appears in Collections: 气候减缓与适应
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作者单位: State Key Laboratory of Space Weather, Center for Space Science and Applied Research, Chinese Academy of Sciences, Beijing, China
Recommended Citation:
Yan G.Q.,Mozer F.S.,Shen C.,et al. Kelvin-Helmholtz vortices observed by THEMIS at the duskside of the magnetopause under southward interplanetary magnetic field[J]. Geophysical Research Letters,2014-01-01,41(13).