DOI: 10.1002/2016GL070253
论文题名: High-latitude ionospheric conductivity variability in three dimensions
作者: McGranaghan R. ; Knipp D.J. ; Matsuo T.
刊名: Geophysical Research Letters
ISSN: 0094-8791
EISSN: 1944-8522
出版年: 2016
卷: 43, 期: 15 起始页码: 7867
结束页码: 7877
语种: 英语
英文关键词: conductivity
; DMSP
; high-latitude ionosphere
; ionospheric electrodynamics
; magnetosphere-ionosphere coupling
; three dimensional
Scopus关键词: E region
; Electric conductivity
; Ionosphere
; Magnetosphere
; Orthogonal functions
; Three dimensional computer graphics
; DMSP
; Electron precipitation
; Empirical orthogonal function analysis
; High-latitude ionosphere
; Interplanetary magnetic fields
; Ionospheric conductivity
; Magnetosphere-ionosphere coupling
; Particle measurement
; Ionospheric measurement
英文摘要: We perform the first ever global-scale, altitude-dependent analysis of polar ionospheric conductivity variability using spectrally resolved in situ satellite particle measurements. With an empirical orthogonal function analysis we identify three primary modes of three-dimensional variability related to ionospheric footprints of the quiet and disturbed geospace environment: (1) perturbation of the quasi-permanent auroral oval, (2) differing projections of electron precipitation during southward and northward interplanetary magnetic field, and (3) a likely imprint of variation in Alfvénic Poynting flux deposition. Together, these modes account for >50% of the total conductivity variability throughout the E region ionosphere. Our results show that height-integrated conductance and height-dependent conductivities are distinctly different, underscoring the importance of studying the ionosphere in three dimensions. We provide the framework for future three-dimensional global analysis of ionosphere-magnetosphere coupling. ©2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84981352079&doi=10.1002%2f2016GL070253&partnerID=40&md5=c5a3f540c9398e129a62c211c4f48823
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9754
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: Aerospace Engineering Sciences, University of Colorado Boulder, Boulder, CO, United States
Recommended Citation:
McGranaghan R.,Knipp D.J.,Matsuo T.. High-latitude ionospheric conductivity variability in three dimensions[J]. Geophysical Research Letters,2016-01-01,43(15).