@Article{SilvaSASMMVACSDJWLLAS:2021:StAn,
               author = "Silva, Ligia Alves da and Shi, J. and Alves, Livia Ribeiro and 
                         Sibeck, D. and Marchezi, Jos{\'e} Paulo and Medeiros, 
                         Cl{\'a}udia and Vieira, Lu{\'{\i}}s Eduardo Antunes and 
                         Agapitov, O. and Cardoso, F. R. and Souza, Vitor Moura Cardoso e 
                         Silva and Dal Lago, Alisson and Jauer, Paulo Roberto and Wang, C. 
                         and Li, H. and Liu, Z. and Alves, Maria Virg{\'{\i}}nia and 
                         Silva, Marlos Rockenbach da",
          affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Chinese 
                         Academy of Sciences} and {Instituto Nacional de Pesquisas 
                         Espaciais (INPE)} and {NASA Goddard Space Flight Center} and 
                         {Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto 
                         Nacional de Pesquisas Espaciais (INPE)} and {Instituto Nacional de 
                         Pesquisas Espaciais (INPE)} and {University of California} and 
                         {Universidade de S{\~a}o Paulo (USP)} and {Instituto Nacional de 
                         Pesquisas Espaciais (INPE)} and {Instituto Nacional de Pesquisas 
                         Espaciais (INPE)} and {Instituto Nacional de Pesquisas Espaciais 
                         (INPE)} and {Chinese Academy of Sciences} and {Chinese Academy of 
                         Sciences} and {Chinese Academy of Sciences} and {Instituto 
                         Nacional de Pesquisas Espaciais (INPE)} and {Instituto Nacional de 
                         Pesquisas Espaciais (INPE)}",
                title = "High-Energy Electron Flux Enhancement Pattern in the Outer 
                         Radiation Belt in Response to the Alfv{\'e}nic Fluctuations 
                         Within High-Speed Solar Wind Stream: A Statistical Analysis",
              journal = "Journal of Geophysical Research: Space Physics",
                 year = "2021",
               volume = "126",
               number = "8",
                pages = "e2021JA029363",
                month = "Aug.",
             keywords = "electron flux enhancement, high speed solar wind stream, 
                         high-energy electron flux, outer radiation belt, ultra low 
                         frequency waves, whistler-mode chorus waves.",
             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 12 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 Alfv{\'e}nic 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.",
                  doi = "10.1029/2021JA029363",
                  url = "http://dx.doi.org/10.1029/2021JA029363",
                 issn = "2169-9402",
             language = "en",
           targetfile = "silva_high.pdf",
        urlaccessdate = "23 maio 2024"
}