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DOI: 10.1002/2015GL067066
Title:
Outer radiation belt dropout dynamics following the arrival of two interplanetary coronal mass ejections
Author: Alves L.R.; Da Silva L.A.; Souza V.M.; Sibeck D.G.; Jauer P.R.; Vieira L.E.A.; Walsh B.M.; Silveira M.V.D.; Marchezi J.P.; Rockenbach M.; Lago A.D.; Mendes O.; Tsurutani B.T.; Koga D.; Kanekal S.G.; Baker D.N.; Wygant J.R.; Kletzing C.A.
Source Publication: Geophysical Research Letters
ISSN: 0094-9380
EISSN: 1944-9111
Publishing Year: 2016
Volume: 43, Issue:3
pages begin: 978
pages end: 987
Language: 英语
Keyword: adiabatic radial transport ; magnetopause shadowing ; nonadiabatic radial transport ; outer radiation belt dynamics ; relativistic electron loss
Scopus Keyword: Atmospherics ; Coherent scattering ; Electrons ; Magnetopause ; Magnetosphere ; Planetary surface analysis ; Solar system ; Interplanetary coronal mass ejections ; Interplanetary shocks ; Outer radiation belt ; Pitch-angle scattering ; Radial transport ; Relativistic electron ; Satellite observations ; Wave-particle interactions ; Radiation belts ; adiabatic process ; belt ; coronal mass ejection ; drift behavior ; electron ; energy ; flux measurement ; magnetopause ; magnetosphere ; radial flow ; satellite imagery ; scattering
English Abstract: Magnetopause shadowing and wave-particle interactions are recognized as the two primary mechanisms for losses of electrons from the outer radiation belt. We investigate these mechanisms, using satellite observations both in interplanetary space and within the magnetosphere and particle drift modeling. Two interplanetary shocks/sheaths impinged upon the magnetopause causing a relativistic electron flux dropout. The magnetic cloud (MC) and interplanetary structure sunward of the MC had primarily northward magnetic field, perhaps leading to a concomitant lack of substorm activity and a 10 daylong quiescent period. The arrival of two shocks caused an unusual electron flux dropout. Test-particle simulations have shown ∼ 2 to 5 MeV energy, equatorially mirroring electrons with initial values of L≥5.5 can be lost to the magnetosheath via magnetopause shadowing alone. For electron losses at lower L-shells, coherent chorus wave-driven pitch angle scattering and ULF wave-driven radial transport have been shown to be viable mechanisms. © 2015. American Geophysical Union. All Rights Reserved.
Related Link: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84961287085&doi=10.1002%2f2015GL067066&partnerID=40&md5=c013a3b0406f7d419d0759c3b7a1b337
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Document Type: 期刊论文
Identifier: http://119.78.100.158/handle/2HF3EXSE/10343
Appears in Collections:科学计划与规划
气候变化与战略

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Affiliation: Instituto Nacional de Pesquisas Espaciais, São José Dos Campos, São Paulo, Brazil

Recommended Citation:
Alves L.R.,Da Silva L.A.,Souza V.M.,et al. Outer radiation belt dropout dynamics following the arrival of two interplanetary coronal mass ejections[J]. Geophysical Research Letters,2016-01-01,43(3).
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