@InProceedings{ConceiçãoSantosMRFABVC:2021:OcMoEx,
               author = "Concei{\c{c}}{\~a}o Santos, F. and Muella, M. T. A. H. and 
                         Resende, Laysa Cristina Ara{\'u}jo and Fagundes, P. R. and 
                         Andrioli, Vania F{\'a}tima and Batista, Paulo Prado and Villat, 
                         v. G. and Carrasco, A. J.",
          affiliation = "{Universidade do Vale do Para{\'{\i}}ba (UNIVAP)} and 
                         {Universidade do Vale do Para{\'{\i}}ba (UNIVAP)} and {Instituto 
                         Nacional de Pesquisas Espaciais (INPE)} and {Universidade do Vale 
                         do Para{\'{\i}}ba (UNIVAP)} and {Instituto Nacional de Pesquisas 
                         Espaciais (INPE)} and {Instituto Nacional de Pesquisas Espaciais 
                         (INPE)} and {Universidade do Vale do Para{\'{\i}}ba (UNIVAP)} 
                         and {Universidad de Los Andes}",
                title = "Occurrence and modeling examination of sporadic-E layers in the 
                         region of the South America (Atlantic) Magnetic Anomaly",
                 year = "2021",
         organization = "Simp{\'o}sio Brasileiro de Geof{\'{\i}}sica Espacial e 
                         Aeronomia, 8. (SBGEA)",
             abstract = "In this work, the occurrence of different types of sporadic-E 
                         layers (Es) was described for two stations located in the region 
                         of the South America Magnetic Anomaly: Jata´\ı and Sao Jos´e 
                         dos Campos. The results show the hourly and monthly values of the 
                         Es occurrences and presented five types of layers (cusp, high, 
                         flat, low, and slant), with the flat/low types (Esf/l) being the 
                         most frequent over both stations. We also analyzed the Es layer 
                         parameters of blanketing frequency (fbEs) and top frequency (ftEs) 
                         obtained from ionosonde data during storm-time periods, in order 
                         to investigate possible evidences of energetic particle-induced 
                         E-layer ionization. The results revealed increases in the values 
                         of the nighttime ftEs and fbEs, which can be related to the 
                         particle precipitation in the South America Magnetic Anomaly 
                         region. Additionally, we investigated the roles of the wind shear 
                         mechanism in the formation of the Es types by using a modified 
                         form of the Ionospheric ERegion Model (MIRE), which incorporates 
                         tidal winds obtained from meteor radar data. Furthermore, the 
                         electron densities deduced from fbEs parameter were compared with 
                         the maximum electron densities obtained from MIRE simulations. 
                         Depending on local time and season, the initial results revealed 
                         for both stations some discrepancies between modeled and measured 
                         electron densities. However, a better fitting was obtained when 
                         the amplitudes of the zonal/meridional wind components were 
                         adjusted by some factor, which may be attributed to the possible 
                         effects of day-to-day tidal wind variability and their interaction 
                         with gravity and planetary waves.",
  conference-location = "Online",
      conference-year = "22-26 mar.",
             language = "en",
        urlaccessdate = "21 maio 2024"
}