DOI: 10.1002/2015GL063623
论文题名: The global structure and time evolution of dayside magnetopause surface eigenmodes
作者: Hartinger M.D. ; Plaschke F. ; Archer M.O. ; Welling D.T. ; Moldwin M.B. ; Ridley A.
刊名: Geophysical Research Letters
ISSN: 0094-8752
EISSN: 1944-8483
出版年: 2015
卷: 42, 期: 8 起始页码: 2594
结束页码: 2602
语种: 英语
英文关键词: eigenmode
; magnetopause
; MHD wave
; surface eigenmode
; surface wave
; ULF wave
Scopus关键词: Magnetopause
; Magnetosphere
; Surface waves
; Eigen modes
; Kelvin- helmholtz instabilities
; Magnetic-field geometry
; Magnetospheric response
; MHD waves
; Solar wind dynamic pressure
; Space weather modeling frameworks
; ULF waves
; Shear flow
; eigenvalue
; frequency analysis
; ionosphere
; magnetic field
; magnetopause
; simulation
; solar wind
; surface wave
; wave propagation
英文摘要: Theoretical work and recent observations suggest that the dayside magnetopause may support its own eigenmode, consisting of propagating surface waves which reflect at the northern and southern ionospheres. These magnetopause surface eigenmodes (MSEs) are a potential source of magnetospheric ultralow-frequency (ULF) waves with frequencies less than 2 mHz. Here we use the Space Weather Modeling Framework to study the magnetospheric response to impulsive solar wind dynamic pressure increases. Waves with 1.8 mHz frequency are excited whose global properties are largely consistent with theoretical predictions for MSE and cannot be explained by other known ULF wave modes. These simulation results lead to two key findings: (1) MSE can be sustained in realistic magnetic field geometries with nonzero flow shear and finite current layer thickness at the magnetopause and (2) MSE can seed the growth of tailward propagating surface waves via the Kelvin-Helmholtz instability. ©2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84929514258&doi=10.1002%2f2015GL063623&partnerID=40&md5=0ad76a7e7cd166c49fc746bcfdc915f9
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/8368
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Bradley Department of Electrical and Computer Engineering, Virginia Polytechnic Institute and State University, Blacksburg, VA, United States
Recommended Citation:
Hartinger M.D.,Plaschke F.,Archer M.O.,et al. The global structure and time evolution of dayside magnetopause surface eigenmodes[J]. Geophysical Research Letters,2015-01-01,42(8).