globalchange  > 气候减缓与适应
DOI: 10.1002/2013GL058942
论文题名:
Gradual diffusion and punctuated phase space density enhancements of highly relativistic electrons: Van Allen Probes observations
作者: Baker D.N.; Jaynes A.N.; Li X.; Henderson M.G.; Kanekal S.G.; Reeves G.D.; Spence H.E.; Claudepierre S.G.; Fennell J.F.; Hudson M.K.; Thorne R.M.; Foster J.C.; Erickson P.J.; Malaspina D.M.; Wygant J.R.; Boyd A.; Kletzing C.A.; Drozdov A.; Shprits Y.Y.
刊名: Geophysical Research Letters
ISSN: 0094-10327
EISSN: 1944-10058
出版年: 2014
卷: 41, 期:5
起始页码: 1351
结束页码: 1358
语种: 英语
英文关键词: radiation belt acceleration
Scopus关键词: Electrons ; Phase space methods ; Probes ; Radiation belts ; Diffusive transport ; Earth's radiation belts ; Electron energization ; Electron radiation belt ; Mega-electron-volt ; Particle dynamics ; Phase space densities ; Relativistic electron ; Cabs (truck) ; acceleration ; diffusion ; electron ; particle motion ; solar wind ; spacecraft ; succession ; timescale
英文摘要: The dual-spacecraft Van Allen Probes mission has provided a new window into mega electron volt (MeV) particle dynamics in the Earth's radiation belts. Observations (up to E ~10 MeV) show clearly the behavior of the outer electron radiation belt at different timescales: months-long periods of gradual inward radial diffusive transport and weak loss being punctuated by dramatic flux changes driven by strong solar wind transient events. We present analysis of multi-MeV electron flux and phase space density (PSD) changes during March 2013 in the context of the first year of Van Allen Probes operation. This March period demonstrates the classic signatures both of inward radial diffusive energization and abrupt localized acceleration deep within the outer Van Allen zone (L ~4.0 ± 0.5). This reveals graphically that both "competing" mechanisms of multi-MeV electron energization are at play in the radiation belts, often acting almost concurrently or at least in rapid succession. Key Points Clear observations to higher energy than ever before Precise detection of where and how acceleration takes place Provides "new eyes" on megaelectron Volt ©2014. The Authors.
URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84894838174&doi=10.1002%2f2013GL058942&partnerID=40&md5=f66755d764a5cd87e0631734e9d30df3
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7591
Appears in Collections:气候减缓与适应

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作者单位: Laboratory for Atmospheric and Space Physics, University of Colorado Boulder, Boulder CO, United States

Recommended Citation:
Baker D.N.,Jaynes A.N.,Li X.,et al. Gradual diffusion and punctuated phase space density enhancements of highly relativistic electrons: Van Allen Probes observations[J]. Geophysical Research Letters,2014-01-01,41(5).
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