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Outer Radiation Belt Dropout Dynamics Following the Arrival of Two Interplanetary Coronal Mass EjectionsMagnetopause 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, sing 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 (C) and interplanetary structure sunward of the MC had primarily northward magnetic field, perhaps leading to a concomitant lack of substorm activity and a 10 day long 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 5.5can 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 shownto be viable mechanisms.
Document ID
20170002758
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Alves, L. R. (Instituto de Pesquisas Espaciais Sao Jose dos Campos, Brazil)
Da Silva, L. A. (Instituto de Pesquisas Espaciais Sao Jose dos Campos, Brazil)
Souza, V. M. (Instituto de Pesquisas Espaciais Sao Jose dos Campos, Brazil)
Sibeck, D. G. (NASA Goddard Space Flight Center Greenbelt, MD United States)
Jauer, P. R. (Instituto de Pesquisas Espaciais Sao Jose dos Campos, Brazil)
Vieira, L. E. A. (Instituto de Pesquisas Espaciais Sao Jose dos Campos, Brazil)
Walsh, B. M. (California Univ. Berkeley, CA, United States)
Silveira, M. V. D. (Universities Space Research Association Boulder, CO, United States)
Marchezi, J. P. (Instituto de Pesquisas Espaciais Sao Jose dos Campos, Brazil)
Rockenbach, M. (Instituto de Pesquisas Espaciais Sao Jose dos Campos, Brazil)
Del Lago, A. (Instituto de Pesquisas Espaciais Sao Jose dos Campos, Brazil)
Mendes, O. (Instituto de Pesquisas Espaciais Sao Jose dos Campos, Brazil)
Tsurutani, B. T. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Koga, D. (Instituto de Pesquisas Espaciais Sao Jose dos Campos, Brazil)
Kanekal, S. G. (NASA Goddard Space Flight Center Greenbelt, MD United States)
Baker, D. N. (Colorado Univ. Boulder, CO, United States)
Wygant, J. R. (Minnesota Univ. Minneapolis, MN, United States)
Kletzing, C. A. (Iowa Univ. Iowa City, IA, United States)
Date Acquired
March 31, 2017
Publication Date
February 6, 2016
Publication Information
Publication: Geophysical Research Letters
Volume: 43
Issue: 3
ISSN: 0094-8276
Subject Category
Space Sciences (General)
Solar Physics
Report/Patent Number
GSFC-E-DAA-TN40936
Funding Number(s)
CONTRACT_GRANT: NNG06EO90A
Distribution Limits
Public
Copyright
Other