DOI: 10.1002/2015GL065230
论文题名: Combined convective and diffusive simulations: VERB-4D comparison with 17 March 2013 Van Allen Probes observations
作者: Shprits Y.Y. ; Kellerman A.C. ; Drozdov A.Y. ; Spence H.E. ; Reeves G.D. ; Baker D.N.
刊名: Geophysical Research Letters
ISSN: 0094-8406
EISSN: 1944-8137
出版年: 2015
卷: 42, 期: 22 起始页码: 9600
结束页码: 9608
语种: 英语
英文关键词: inner magnetosphere
; numerical simulations
; radiation belts
; ring current
; Van Allen Probes
; wave-particle interactions
Scopus关键词: Computer simulation
; Diffusion
; Geomagnetism
; Magnetosphere
; Probes
; Radiation belts
; Relativity
; Trajectories
; Acceleration mechanisms
; Electron radiation belt
; Geomagnetic activities
; Inner magnetosphere
; Relativistic electron
; Ring currents
; Sensitivity Simulation
; Wave-particle interactions
; Electrons
; convection
; electron density
; energy dissipation
; geomagnetic field
; magnetosphere
; numerical model
; particle motion
; probe
; radial diffusion
; radiation balance
; sensitivity analysis
; spatiotemporal analysis
; storm
; trajectory
; wave action
英文摘要: This study is focused on understanding the coupling between different electron populations in the inner magnetosphere and the various physical processes that determine evolution of electron fluxes at different energies. Observations during the 17 March 2013 storm and simulations with a newly developed Versatile Electron Radiation Belt-4D (VERB-4D) are presented. Analysis of the drift trajectories of the energetic and relativistic electrons shows that electron trajectories at transitional energies with a first invariant on the scale of ~100 MeV/G may resemble ring current or relativistic electron trajectories depending on the level of geomagnetic activity. Simulations with the VERB-4D code including convection, radial diffusion, and energy diffusion are presented. Sensitivity simulations including various physical processes show how different acceleration mechanisms contribute to the energization of energetic electrons at transitional energies. In particular, the range of energies where inward transport is strongly influenced by both convection and radial diffusion are studied. The results of the 4-D simulations are compared to Van Allen Probes observations at a range of energies including source, seed, and core populations of the energetic and relativistic electrons in the inner magnetosphere. Key Points Both convection and radial diffusion significantly contribute to transport at transitional energies VERB-4D simulations qualitatively agree with observations from tens of keV to MeV Convection, radial, pitch angle, energy, and mixed diffusion all play an important role. © 2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84956892506&doi=10.1002%2f2015GL065230&partnerID=40&md5=781b0f2ae9133aa8b88925a6a20a6ea0
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/8022
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: Department of Earth, Planetary, and Space Sciences, University of California, Los Angeles, CA, United States
Recommended Citation:
Shprits Y.Y.,Kellerman A.C.,Drozdov A.Y.,et al. Combined convective and diffusive simulations: VERB-4D comparison with 17 March 2013 Van Allen Probes observations[J]. Geophysical Research Letters,2015-01-01,42(22).