High-Energy Electron Flux Enhancement Pattern in the Outer Radiation Belt in Response to the Alfvénic Fluctuations Within High-Speed Solar Wind Stream: A Statistical Analysis (2021)
- Authors:
- Autor USP: ROJAS, FLAVIA REIS CARDOSO - EEL
- Unidade: EEL
- DOI: 10.1029/2021ja029363
- Assunto: ENGENHARIA AEROESPACIAL
- Agências de fomento:
- Language: Inglês
- Abstract: The coupling response between solar wind structures and the magnetosphere is highly complex, leading to different effects in the outer radiation belt electron fluxes. Most Coronal Mass Ejections cause strong geomagnetic storms with short recovery phases, often 1–2 days. By contrast, High-Speed Solar Wind Streams lead to moderate and weak storms often with much longer recovery phases, from several to ∼10 days. The magnetosphere receives energy for a long time under the influence of the HSSs, considerably changing its dynamics. This in turn has an effect on the charged particles trapped in the outer radiation belt. Although the high-energy electron flux enhancements have received considerable attention, the high-energy electron flux enhancement pattern (L > 4) has not. This paper identifies 37 events with this enhancement pattern in the high-energy electron flux during the Van Allen Probes era. We find the enhancements coincident with HSS occurrence. The interplanetary magnetic field (IMF) exhibits north/south Bz fluctuations of Alfvénic nature with moderate amplitudes. The high-energy electron flux enhancements also correspond to long periods of auroral activity indicating a relationship to magnetotail dynamics. However, the AE index only reaches moderate values. Ultra-Low Frequency waves were present in all of the events and whistler-mode chorus waves were present in 89.1% of the events, providing a convenient scenario for wave-particle interactions. The radial gradient of the ULF wave power related to the L, under the influence of the HSSs, is necessary to trigger the physical processes responsible for this type of high-energy electron flux enhancement pattern.
- Imprenta:
- Publisher: AGU
- Publisher place: Sheffield-UK
- Date published: 2021
- Source:
- Título: Journal of geophysical research-space physics
- ISSN: 2169-9380
- Volume/Número/Paginação/Ano: v.126, n.8, p.1-26, 2021
- Este periódico é de assinatura
- Este artigo é de acesso aberto
- URL de acesso aberto
- Cor do Acesso Aberto: bronze
- Licença: publisher-specific-oa
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ABNT
SILVA, Ligia Alves et al. High-Energy Electron Flux Enhancement Pattern in the Outer Radiation Belt in Response to the Alfvénic Fluctuations Within High-Speed Solar Wind Stream: A Statistical Analysis. Journal of geophysical research-space physics, v. 126, n. 8, p. 1-26, 2021Tradução . . Disponível em: https://doi.org/10.1029/2021ja029363. Acesso em: 03 jan. 2026. -
APA
SILVA, L. A., Souza, V. M., Dal Lago, A., Jauer, P. R., Wang, C., Li, H., et al. (2021). High-Energy Electron Flux Enhancement Pattern in the Outer Radiation Belt in Response to the Alfvénic Fluctuations Within High-Speed Solar Wind Stream: A Statistical Analysis. Journal of geophysical research-space physics, 126( 8), 1-26. doi:10.1029/2021ja029363 -
NLM
SILVA LA, Souza VM, Dal Lago A, Jauer PR, Wang C, Li H, Liu Z, Alves MV, Rockenbach M, Shi J, Alves LR, Sibeck D, Marchezi JP, Medeiros C, Vieira LEA, Agapitov O, Rojas FRC. High-Energy Electron Flux Enhancement Pattern in the Outer Radiation Belt in Response to the Alfvénic Fluctuations Within High-Speed Solar Wind Stream: A Statistical Analysis [Internet]. Journal of geophysical research-space physics. 2021 ;126( 8): 1-26.[citado 2026 jan. 03 ] Available from: https://doi.org/10.1029/2021ja029363 -
Vancouver
SILVA LA, Souza VM, Dal Lago A, Jauer PR, Wang C, Li H, Liu Z, Alves MV, Rockenbach M, Shi J, Alves LR, Sibeck D, Marchezi JP, Medeiros C, Vieira LEA, Agapitov O, Rojas FRC. High-Energy Electron Flux Enhancement Pattern in the Outer Radiation Belt in Response to the Alfvénic Fluctuations Within High-Speed Solar Wind Stream: A Statistical Analysis [Internet]. Journal of geophysical research-space physics. 2021 ;126( 8): 1-26.[citado 2026 jan. 03 ] Available from: https://doi.org/10.1029/2021ja029363 - Auroral precipitating energy during long magnetic storms
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Informações sobre o DOI: 10.1029/2021ja029363 (Fonte: oaDOI API)
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