@Article{GuharayBatiBuri:2020:Si12Os,
               author = "Guharay, Amitava and Batista, Paulo Prado and Buriti, R. A.",
          affiliation = "{Physical Research Laboratory} and {Instituto Nacional de 
                         Pesquisas Espaciais (INPE)} and {Universidade Federal de Campina 
                         Grande (UFCG)}",
                title = "Signature of a 120-day oscillation in the MLT winds and tides over 
                         S{\~a}o Jo{\~a}o do Cariri (7.4oS, 36.5oW)",
              journal = "Journal of Atmospheric and Solar-Terrestrial Physics",
                 year = "2020",
               volume = "207",
                pages = "105337",
                 note = "{Setores de Atividade: Pesquisa e desenvolvimento 
                         cient{\'{\i}}fico.}",
             keywords = "120-day oscillation, S{\~a}o Jo{\~a}o do Cariri, meteor radar, 
                         Meteor Wind.",
             abstract = "A conspicuous and intermittent signature of a 120-day oscillation 
                         is found in the winds and tides in the mesosphere and lower 
                         thermosphere (MLT) over a Southern hemispheric equatorial station, 
                         S{\~a}o Jo{\~a}o do Cariri (7.4oS, 36.5oW) for the first time 
                         using meteor radar observations during the interval 20042008. The 
                         intermittent 120-day modulation can be as high as 10 m/s in the 
                         MLT winds. However, the seasonal component of the concerned 
                         periodicity, i.e. terannual oscillation is relatively smaller in 
                         amplitude (<4 m/s) than the instantaneous component. The 
                         oscillation feature is also investigated for the dominant tides. 
                         The 120-day modulation amplitude is higher (maximum ~ 5 m/s) in 
                         the diurnal and semidiurnal tides and relatively smaller in the 
                         terdiurnal tide (peak ~ 2 m/s). The intermittent behavior of the 
                         particular oscillation in wind and absence in temperature may 
                         imply it to be a feature of the MLT wind circulation. Proximity of 
                         period may also indicate a possible contribution from the lower 
                         atmospheric intraseasonal oscillation to some extent at times. 
                         Furthermore, existence of the same periodicity in the solar UV 
                         flux may indicate a plausible indirect solar connection with the 
                         MLT circulation although direct solar influence cannot be 
                         ascertained. The evident imprint of the oscillation in the MLT 
                         wind and tides accentuates the need of further extensive studies 
                         to lend valuable insights of the underlying physical 
                         processes/mechanisms associated to their relationship hitherto 
                         remained unexplored.",
                  doi = "10.1016/j.jastp.2020.105337",
                  url = "http://dx.doi.org/10.1016/j.jastp.2020.105337",
                 issn = "1364-6826",
                label = "lattes: 2306964700488382 2 GuharayBatiBuri:2020:Si12Os",
             language = "en",
           targetfile = "2020jastp_Guharay.120dOsc.pdf",
        urlaccessdate = "27 abr. 2024"
}