DOI: 10.1029/2017JA025003
Scopus记录号: 2-s2.0-85048881997
论文题名: Nonlinear and Synergistic Effects of ULF Pc5, VLF Chorus, and EMIC Waves on Relativistic Electron Flux at Geosynchronous Orbit
作者: Simms L.E. ; Engebretson M.J. ; Clilverd M.A. ; Rodger C.J. ; Reeves G.D.
刊名: Journal of Geophysical Research: Space Physics
ISSN: 21699380
出版年: 2018
卷: 123, 期: 6 起始页码: 4755
结束页码: 4766
语种: 英语
英文关键词: effect of EMIC waves on electrons
; effect of ULF Pc5 waves on electrons
; effect of VLF chorus waves on electrons
; empirical prediction models
; nonlinear effects of waves on electrons
; synergistic effects of waves
英文摘要: Using data covering the years 2005–2009, we study the linear and nonlinear responses of log10 relativistic electron flux measured at geosynchronous orbit to ultralow frequency (ULF) Pc5, very low frequency (VLF) lower band chorus, and electromagnetic ion cyclotron (EMIC) waves. We use regression models incorporating a quadratic term and a synergistic interaction term. Relativistic electron fluxes respond to ULF Pc5 and VLF chorus waves both linearly and nonlinearly. ULF Pc5 waves contribute both to electron enhancement (at midrange wave activity) and loss (at high levels of wave activity). Nonlinear effects of VLF chorus are positive (i.e., cause acceleration), adding to the positive linear effects. Synergistic interaction effects between high levels of VLF chorus and midrange values of ULF Pc5 waves result in more electron acceleration than would be predicted by a simpler additive model. Similarly, the negative effect of EMIC waves (losses) is more influential than would be predicted by a linear model when combined with either VLF chorus or ULF Pc5 waves. During disturbed conditions (high Kp), geostationary electron flux responds more strongly to the same levels of ULF Pc5 and VLF chorus waves. This flux also responds more to ULF Pc5 and chorus waves during southward Bz conditions. Unstandardized regression coefficients for models incorporating nonlinear and synergistic effects of waves are presented for use in future modeling. ©2018. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/113775
Appears in Collections: 气候减缓与适应
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作者单位: Department of Physics, Augsburg University, Minneapolis, MN, United States; British Antarctic Survey (NERC), Cambridge, United Kingdom; Department of Physics, University of Otago, Dunedin, New Zealand; Los Alamos National Laboratory, Los Alamos, NM, United States
Recommended Citation:
Simms L.E.,Engebretson M.J.,Clilverd M.A.,et al. Nonlinear and Synergistic Effects of ULF Pc5, VLF Chorus, and EMIC Waves on Relativistic Electron Flux at Geosynchronous Orbit[J]. Journal of Geophysical Research: Space Physics,2018-01-01,123(6)