@InProceedings{AlvesSilSilSibWyg:2019:HoDoOu,
               author = "Alves, Livia Ribeiro and Silva, Graziela Belmira Dias da and 
                         Silva, Ligia Alves da and Sibeck, David G. and Wygant, John R.",
          affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto 
                         Nacional de Pesquisas Espaciais (INPE)} and {Instituto Nacional de 
                         Pesquisas Espaciais (INPE)} and {NASA Goddard Space Flight Center} 
                         and {University of Minnesota}",
                title = "How Does The Outer Radiation Belt Change Under Recurrent Solar 
                         Wind Structures?",
                 year = "2019",
         organization = "AGU Fall Meeting",
             abstract = "The key question on the Earth's radiation belts trapped particles 
                         lies on the understanding of how solar wind drives the 
                         magnetospheric physical mechanisms changing the trapped particle 
                         populations. In particular, in this study we are interested in 
                         describing the electron flux changes under interplanetary medium 
                         conditions determined by recurrent interplanetary structures. We 
                         identified 46 Corotating Interaction Regions (CIRs) throughout the 
                         descending phase of the solar cycle 24. Losses of relativistic 
                         electrons are observed in 61% of the events. To evaluate the 
                         physical mechanisms involved with these dropouts, we choose a CIR 
                         event that recurred through at least seven solar rotations. The 
                         first passage started on 30 October 2017 and the seventh on 05 May 
                         2018. Since the interplanetary conditions slightly change in each 
                         solar wind rotation, the outer radiation belt dynamics also 
                         changes. We identify recurrent characteristics, e.g. the increase 
                         of ultra-low frequency (ULF) waves activity during each CIR's 
                         passage, the time-step required for the outer radiation belt 
                         recovery of about two days after the CIR's arrival, and the 
                         increase of low energy particle flux prior to this recovery. The 
                         outer radiation belt flux decreases in four of the seven passages 
                         studied, dayside magnetosphere is eventually compressed, and ULF 
                         waves are observed in a broad range of frequencies from Pc3 to 
                         Pc5, which is likely to persist for days. The results obtained 
                         give a description of the physical mechanisms occurring in the 
                         recurrent CIR-magnetosphere coupling, which can provide subsidies 
                         to improve outer radiation belt electron flux modeling and 
                         forecasting accuracy.",
  conference-location = "San Francisco, CA",
      conference-year = "09-13 dec.",
             language = "en",
           targetfile = "alves_how.pdf",
        urlaccessdate = "26 abr. 2024"
}