DOI: 10.1002/2013GL058819
论文题名: Event-specific chorus wave and electron seed population models in DREAM3D using the Van Allen Probes
作者: Tu W. ; Cunningham G.S. ; Chen Y. ; Morley S.K. ; Reeves G.D. ; Blake J.B. ; Baker D.N. ; Spence H.
刊名: Geophysical Research Letters
ISSN: 0094-10313
EISSN: 1944-10044
出版年: 2014
卷: 41, 期: 5 起始页码: 1359
结束页码: 1366
语种: 英语
英文关键词: DREAM3D
; event-specific
; Van Allen Probes
Scopus关键词: Diffusion
; Electromagnetic waves
; Electrons
; Magnetopause
; Population statistics
; Radiation belts
; DREAM3D
; Driving conditions
; Event-specific
; Population model
; Radial diffusion
; Strong enhancement
; Three dimensions
; Wave amplitudes
; Probes
; amplitude
; atmospheric electricity
; electromagnetic wave
; electron
; geomagnetic storm
; magnetopause
; numerical model
; probe
; radial diffusion
; solar wind
; wave modeling
英文摘要: The DREAM3D diffusion model is applied to Van Allen Probes observations of the fast dropout and strong enhancement of MeV electrons during the October 2012 "double-dip" storm. We show that in order to explain the very different behavior in the two "dips," diffusion in all three dimensions (energy, pitch angle, and Lo) coupled with data-driven, event-specific inputs, and boundary conditions is required. Specifically, we find that outward radial diffusion to the solar wind-driven magnetopause, an event-specific chorus wave model, and a dynamic lower-energy seed population are critical for modeling the dynamics. In contrast, models that include only a subset of processes, use statistical wave amplitudes, or rely on inward radial diffusion of a seed population, perform poorly. The results illustrate the utility of the high resolution, comprehensive set of Van Allen Probes' measurements in studying the balance between source and loss in the radiation belt, a principal goal of the mission. Key Points DREAM3D uses event-specific driving conditions measured by Van Allen Probes Electron dropout is due to outward radial diffusion to compressed magnetopause Event-specific chorus and seed electrons are necessary for the enhancement ©2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84895148177&doi=10.1002%2f2013GL058819&partnerID=40&md5=3e0b041375cd12232a03684af20ce143
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7577
Appears in Collections: 气候减缓与适应
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作者单位: Space Science and Applications Group, Los Alamos National Laboratory, Los Alamos NM, United States
Recommended Citation:
Tu W.,Cunningham G.S.,Chen Y.,et al. Event-specific chorus wave and electron seed population models in DREAM3D using the Van Allen Probes[J]. Geophysical Research Letters,2014-01-01,41(5).