DOI: 10.1002/2013GL058438
论文题名: Prompt energization of relativistic and highly relativistic electrons during a substorm interval: Van Allen Probes observations
作者: Foster J.C. ; Erickson P.J. ; Baker D.N. ; Claudepierre S.G. ; Kletzing C.A. ; Kurth W. ; Reeves G.D. ; Thaller S.A. ; Spence H.E. ; Shprits Y.Y. ; Wygant J.R.
刊名: Geophysical Research Letters
ISSN: 0094-10511
EISSN: 1944-10242
出版年: 2014
卷: 41, 期: 1 起始页码: 20
结束页码: 25
语种: 英语
英文关键词: Prompt Energizations
; Radiation Belts
; Relativistic Electrons
; Substorm
Scopus关键词: Magnetic field magnitudes
; Magnetic storms
; Population and energy
; Prompt Energizations
; Relativistic electron
; Spacecraft radiations
; Substorms
; Wave intensities
; Electrons
; Geomagnetism
; Probes
; Storms
; Radiation belts
; cloud microphysics
; magnetic field
; magnetosphere
; plasma
; polarization
; sensor
英文摘要: On 17 March 2013, a large magnetic storm significantly depleted the multi-MeV radiation belt. We present multi-instrument observations from the Van Allen Probes spacecraft Radiation Belt Storm Probe A and Radiation Belt Storm Probe B at ~6 Re in the midnight sector magnetosphere and from ground-based ionospheric sensors during a substorm dipolarization followed by rapid reenergization of multi-MeV electrons. A 50% increase in magnetic field magnitude occurred simultaneously with dramatic increases in 100 keV electron fluxes and a 100 times increase in VLF wave intensity. The 100 keV electrons and intense VLF waves provide a seed population and energy source for subsequent radiation belt enhancements. Highly relativistic (>2 MeV) electron fluxes increased immediately at L* ~ 4.5 and 4.5 MeV flux increased >90 times at L* = 4 over 5 h. Although plasmasphere expansion brings the enhanced radiation belt multi-MeV fluxes inside the plasmasphere several hours postsubstorm, we localize their prompt reenergization during the event to regions outside the plasmasphere. Key Points Substorm dynamics are important for highly relativistic electron energization Cold plasma preconditioning is significant for rapid relativistic energization Relativistic / highly relativistic electron energization can occur in < 5 hrs ©2013. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84896691722&doi=10.1002%2f2013GL058438&partnerID=40&md5=fdcbe16cc1de4756521692d17b2ee7f3
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7775
Appears in Collections: 气候减缓与适应
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作者单位: Atmospheric Sciences Group, Haystack Observatory, Massachusetts Institute of Technology, Westford, MS, United States
Recommended Citation:
Foster J.C.,Erickson P.J.,Baker D.N.,et al. Prompt energization of relativistic and highly relativistic electrons during a substorm interval: Van Allen Probes observations[J]. Geophysical Research Letters,2014-01-01,41(1).