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@Article{Ara˙joLimaBatiJaco:2020:BeMoTi,
               author = "Ara{\'u}jo, Luciana Rodrigues de and Lima, Lourivaldo Mota and 
                         Batista, Paulo Prado and Jacobi, Christoph",
          affiliation = "{Universidade Estadual da Para{\'{\i}}ba (UEPB)} and 
                         {Universidade Estadual da Para{\'{\i}}ba (UEPB)} and {Instituto 
                         Nacional de Pesquisas Espaciais (INPE)} and {Universit{\"a}t 
                         Leipzig}",
                title = "Behaviour of monthly tides from meteor radar winds at 22.7║S 
                         during declining phases of 23 and 24 solar cycles",
              journal = "Journal of Atmospheric and Solar-Terrestrial Physics",
                 year = "2020",
               volume = "205",
                pages = "e105298",
                month = "Sept.",
             keywords = "Tides, Solar Cycle, Quasi-Biennial Oscillation (QBO).",
             abstract = "Atmospheric tides dominate the mesosphere and lower thermosphere 
                         (MLT) dynamics and show seasonal, interannual as well as long term 
                         variability. In the present study, MLT wind data obtained between 
                         1999 and 2019 from meteor radar observations at Cachoeira Paulista 
                         (22.7\∘S, 45.0\∘W), Brazil, have been used to 
                         investigate similarities and differences in the diurnal, 
                         semidiurnal and terdiurnal tide amplitudes during the declining 
                         phases of solar cycles 23 and 24. The equinoctial peaks of the 
                         terdiurnal and semidiurnal tide amplitudes decay from solar 
                         maximum to solar minimum, while diurnal tide amplitudes present 
                         high variability, but no obvious long-term trend or decadal 
                         variability. The deseasonalized MLT terdiurnal and semidiurnal 
                         tidal amplitudes show higher positive correlation with solar 
                         activity during solar cycle 24 (\ρ=0.97 and 0.90) than 
                         during solar cycle 23 (\ρ=0.85 and 0.67) and an 
                         insignificant correlation with the quasi-biennial oscillation 
                         (QBO), during both solar cycles, in disagreement to some results 
                         reported in the literature. The deseasonalized MLT diurnal tidal 
                         amplitudes show QBO signals whose amplitudes decrease with solar 
                         activity during the declining phase of solar cycle 23, suggesting 
                         a modulation of the QBO amplitude of the MLT diurnal tide by solar 
                         activity. However, in contrast to solar cycle 23, quasi-biennial 
                         amplitudes of the diurnal tide increase during the declining phase 
                         of the very weak solar cycle 24.",
                  doi = "10.1016/j.jastp.2020.105298",
                  url = "http://dx.doi.org/10.1016/j.jastp.2020.105298",
                 issn = "1364-6826",
             language = "en",
           targetfile = "araujo_behavior.pdf",
        urlaccessdate = "27 jan. 2021"
}


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