DOI: 10.1002/2013GL058485
论文题名: A nonstorm time enhancement of relativistic electrons in the outer radiation belt
作者: Schiller Q. ; Li X. ; Blum L. ; Tu W. ; Turner D.L. ; Blake J.B.
刊名: Geophysical Research Letters
ISSN: 0094-10525
EISSN: 1944-10256
出版年: 2014
卷: 41, 期: 1 起始页码: 7
结束页码: 12
语种: 英语
英文关键词: enhancement
; internal acceleration
; outer radiation belt
; phase space density
; rapid radial transport
; relativistic electrons
Scopus关键词: Magnetic electrons
; Orders of magnitude
; Outer radiation belt
; Phase space densities
; Radial transport
; Relativistic electron
; Relativistic electron enhancement
; Wave-particle interactions
; Experiments
; Geomagnetism
; Image enhancement
; Phase space methods
; Probes
; Radiation belts
; Storms
; Telescopes
; Electrons
; acceleration
; climate modeling
; geomagnetic storm
; solar activity
; spectrometry
; transport process
英文摘要: Despite the lack of a geomagnetic storm (based on the Dst index), relativistic electron fluxes were enhanced over 2.5 orders of magnitude in the outer radiation belt in 13 h on 13-14 January 2013. The unusual enhancement was observed by Magnetic Electron Ion Spectrometer (MagEIS), onboard the Van Allen Probes; Relativistic Electron and Proton Telescope Integrated Little Experiment, onboard the Colorado Student Space Weather Experiment; and Solid State Telescope, onboard Time History of Events and Macroscale Interactions during Substorms (THEMIS). Analyses of MagEIS phase space density (PSD) profiles show a positive outward radial gradient from 4 < L < 5.5. However, THEMIS observations show a peak in PSD outside of the Van Allen Probes' apogee, which suggest a very interesting scenario: wave-particle interactions causing a PSD peak at ~ L* = 5.5 from where the electrons are then rapidly transported radially inward. This letter demonstrates, for the first time in detail, that geomagnetic storms are not necessary for causing dramatic enhancements in the outer radiation belt. Key Points Extreme relativistic electron enhancements do not require a geomagnetic storm This enhancement is caused by internal acceleration and rapid radial transport Conjunctive measurements are required to better understand system dynamics ©2013. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84896723764&doi=10.1002%2f2013GL058485&partnerID=40&md5=5d9d08a408b3fd5d7e62991a3ba2fa73
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7789
Appears in Collections: 气候减缓与适应
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作者单位: Department of Aerospace Engineering Sciences, University of Colorado Boulder, Boulder, CO 80303, United States
Recommended Citation:
Schiller Q.,Li X.,Blum L.,et al. A nonstorm time enhancement of relativistic electrons in the outer radiation belt[J]. Geophysical Research Letters,2014-01-01,41(1).