globalchange  > 气候减缓与适应
DOI: 10.1002/grl.50627
论文题名:
Evolution and slow decay of an unusual narrow ring of relativistic electrons near L ~ 3.2 following the September 2012 magnetic storm
作者: Thorne R.M.; Li W.; Ni B.; Ma Q.; Bortnik J.; Baker D.N.; Spence H.E.; Reeves G.D.; Henderson M.G.; Kletzing C.A.; Kurth W.S.; Hospodarsky G.B.; Turner D.; Angelopoulos V.
刊名: Geophysical Research Letters
ISSN: 0094-8756
EISSN: 1944-8487
出版年: 2013
卷: 40, 期:14
起始页码: 3507
结束页码: 3511
语种: 英语
英文关键词: plasmaspheric hiss ; relativistic electrons
Scopus关键词: Electron energies ; Long term stability ; Outer radiation belt ; Partial depletion ; Pitch-angle scattering ; plasmaspheric hiss ; Relativistic electron ; Telescope instruments ; Electron ring accelerators ; Electrons ; Geomagnetism ; Radiation belts ; Decay (organic) ; belt ; electron ; energy efficiency ; instrumentation ; quantitative analysis ; storm ; timescale
英文摘要: A quantitative analysis is performed on the decay of an unusual ring of relativistic electrons between 3 and 3.5 RE, which was observed by the Relativistic Electron Proton Telescope instrument on the Van Allen probes. The ring formed on 3 September 2012 during the main phase of a magnetic storm due to the partial depletion of the outer radiation belt for L > 3.5, and this remnant belt of relativistic electrons persisted at energies above 2 MeV, exhibiting only slow decay, until it was finally destroyed during another magnetic storm on 1 October. This long-term stability of the relativistic electron ring was associated with the rapid outward migration and maintenance of the plasmapause to distances greater than L = 4. The remnant ring was thus immune from the dynamic process, which caused rapid rebuilding of the outer radiation belt at L > 4, and was only subject to slow decay due to pitch angle scattering by plasmaspheric hiss on timescales exceeding 10-20 days for electron energies above 3 MeV. At lower energies, the decay is much more rapid, consistent with the absence of a long-duration electron ring at energies below 2 MeV. © 2013. American Geophysical Union. All Rights Reserved.
URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84880600552&doi=10.1002%2fgrl.50627&partnerID=40&md5=17e2fcf09f57850690c1b8785f5fc08d
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/6020
Appears in Collections:气候减缓与适应

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作者单位: Department of Atmospheric and Oceanic Sciences, University of California, 405 Hilgard Ave., Los Angeles, CA 90095, United States

Recommended Citation:
Thorne R.M.,Li W.,Ni B.,et al. Evolution and slow decay of an unusual narrow ring of relativistic electrons near L ~ 3.2 following the September 2012 magnetic storm[J]. Geophysical Research Letters,2013-01-01,40(14).
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