@InProceedings{AlvesSSSMJFDS:2023:OuRaBe,
               author = "Alves, Livia Ribeiro and Silva, Ligia Alves da and Silva, Graziela 
                         Belmira Dias da and Schaefer, Daiene M. and Marchezi, Jos{\'e} 
                         Paulo and Jauer, Paulo Ricardo and Ferreira, Karen J{\'u}lia 
                         Coldebella and Deggeroni, Vin{\'{\i}}cius and Sibeck, David G.",
          affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto 
                         Nacional de Pesquisas Espaciais (INPE)} and {Instituto Nacional de 
                         Pesquisas Espaciais (INPE)} and {Universidade Tecnol{\'o}gica 
                         Federal do Paran{\'a} (UTFPR)} and {University of New Hampshire 
                         Main Campus} and {Instituto Nacional de Pesquisas Espaciais 
                         (INPE)} and {Instituto Nacional de Pesquisas Espaciais (INPE)} and 
                         {Instituto Nacional de Pesquisas Espaciais (INPE)} and NASA/GSFC",
                title = "Outer radiation belt electron flux response to enhanced solar wind 
                         speed daily average",
            booktitle = "Proceedings...",
                 year = "2023",
         organization = "AGU FAll Meeting",
            publisher = "AGU",
             abstract = "The relationship between relativistic electron fluxes in the 
                         radiation belts and the solar wind speed has been investigated 
                         since 1979 to determine how the outer radiation belt responds to 
                         increases in the solar wind speed. Since then, several papers have 
                         addressed electrons at geosynchronous orbit, and theorists have 
                         explained how increases in the solar wind speed can drive the 
                         Earth's magnetosphere. Among these advances, an important point is 
                         the distributions of outer radiation belt electron fluxes as a 
                         function of solar wind speed, as well as increases in 
                         magnetospheric wave activity during these periods. This work 
                         determines the upper limit of the outer radiation belt electron 
                         fluxes as a function of solar wind speed, in addition to the 
                         magnetospheric wave activity that contributes to enhanced 
                         relativistic electron fluxes. We analyze the daily average of the 
                         solar wind speed and outer radiation belt electron fluxes with 
                         energies of 1.8 MeV, 2.1 MeV, 2.6 MeV, and 3.4 MeV at several 
                         L-shells (4, 4.5, and 5). Also, we consider the daily average of 
                         the ULF wave power in the Pc5 frequency range (2-5 mHz) which is 
                         often invoked to account for inward diffusion. Data sets are 
                         provided by Van Allen Probes (2013-2018) and ACE satellite. Our 
                         results show that the outer radiation belt electron flux reaches 
                         more than 2.5x106 cm2 s-1 sr-1 MeV-1 when daily averages of the 
                         solar wind speed surpass 500 km/s. Flux levels can remain enhanced 
                         for a long periods, leading to several days of enhanced fluxes 
                         even for low solar wind speeds. Generally, we observe that solar 
                         wind speed varies as the solar cycle progress. Eventually, solar 
                         wind events can reach fast speeds (on average) and, thus, the 
                         change in the electron flux distribution in the outer radiation 
                         belt is more often observed. Our results aim to contribute to the 
                         understanding of the physical processes involved in the outer 
                         radiation belt electron flux enhancements during fast solar wind 
                         streams.",
  conference-location = "San Francisco, CA",
      conference-year = "11-15 Dec. 2023",
             language = "en",
        urlaccessdate = "21 maio 2024"
}