@Article{ConceiçãoSantosMuReFaAnBaCa:2020:RoTiWi,
               author = "Concei{\c{c}}{\~a}o Santos, Fredson and Muella, Marcio Tadeu de 
                         Assis Honorato and Resende, Laysa Cristina Ara{\'u}jo and 
                         Fagundes, Paulo Roberto and Andrioli, V{\^a}nia F{\'a}tima and 
                         Batista, Paulo Prado and Carrasco, Alexander Jos{\'e}",
          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 {Universidad de Los Andes}",
                title = "On the role of tidal winds in the descending of the high type of 
                         sporadic layer (Esh)",
              journal = "Advances in Space Research",
                 year = "2020",
               volume = "65",
               number = "9",
                pages = "2131--2147",
                month = "May",
             keywords = "Sporadic layers, Tidal winds, E-region model, Low-latitude 
                         ionosphere.",
             abstract = "As the prevailing tidal winds in the E region are generated by 
                         heating mechanisms, the dynamics of Es layers impacted by solar 
                         tides is a relevant theme in the space weather studies. This paper 
                         aims to identify the tidal wind component involved in the 
                         mechanism of formation and descending of the high type of sporadic 
                         layer (Esh). The Esh layers observed at altitudes between around 
                         120 and 150 km in the Brazilian low latitude stations of 
                         Jata{\'{\i}} and S{\~a}o Jos{\'e} dos Campos during the months 
                         of April, June, September and December of 2016 are used in this 
                         analysis. The height variability and altitude descent of the Esh 
                         layers are analyzed from the h\′Es parameter obtained by 
                         ionosonde data. In this study, the observational data are compared 
                         with the simulations generated by an extended version of the 
                         Ionospheric E-Region Model (MIRE). At higher altitudes in the E 
                         region, the results show that the prevailing tidal pattern and 
                         wind direction controlling the Esh layer formation and descent are 
                         different depending on month: (a) in April and June the zonal wind 
                         component and the associated semidiurnal tidal oscillations 
                         prevail, with some differences in terms of time of occurrence and 
                         descending speeds, and (b) in September and December the diurnal 
                         tidal periodicities become dominant, and both the meridional and 
                         zonal wind components seem to control the descending of the Esh 
                         layers. Since the role of the tidal periodicities and wind 
                         directions changed depending on the month, the results suggest a 
                         possible seasonal tidal wind pattern, which is not well understood 
                         from the present study but requires further investigation. Other 
                         relevant aspects of the observations and the modeling are 
                         highlighted and discussed.",
                  doi = "10.1016/j.asr.2019.11.024",
                  url = "http://dx.doi.org/10.1016/j.asr.2019.11.024",
                 issn = "0273-1177 and 1879-1948",
             language = "en",
           targetfile = "conceicao-role.pdf",
        urlaccessdate = "08 maio 2024"
}