@InProceedings{MitraGuhBatBurMof:2022:InMiAt,
               author = "Mitra, G. and Guharay, A. and Batista, Paulo Prado and Buriti, R. 
                         A. and Moffat-Griffin, T.",
          affiliation = "{Indian Institute of Technology} and {Indian Institute of 
                         Technology} and {Instituto Nacional de Pesquisas Espaciais (INPE)} 
                         and {Universidade Federal de Campina Grande (UFCG)} and {British 
                         Antarctic Survey}",
                title = "Investigation on the Middle atmosphere Tidal variability during 
                         September 2019 Southern Hemisphere minor Sudden Stratospheric 
                         Warming",
                 year = "2022",
         organization = "International Symposium on Equatorial Aeronomy, 16.",
             abstract = "Tidal variability in the middle atmosphere during September 2019 
                         Southern hemisphere minor sudden stratospheric warming (SSW) is 
                         investigated utilizing ground-based meteor radar wind observations 
                         from the equatorial, extratropical, middle, and high latitude 
                         stations and reanalysis dataset. The poleward warming moves from 
                         the mesosphere to the stratosphere before the onset of SSW. The 
                         diurnal and semidiurnal tides at individual observational sites do 
                         not exhibit any significant response to the warming event, but a 
                         notable response in some specific zonal wavenumber components, i. 
                         e., DW1 (migrating diurnal tide), DE3 (nonmigrating eastward 
                         wavenumber 3 diurnal tide), and SW2 (migrating semidiurnal tide) 
                         is found in the global reanalysis dataset. The DW1 enhances during 
                         the post-warming days in the mesosphere and lower thermosphere 
                         (MLT) possibly due to increased water vapor at all the meteor 
                         radar observing locations. The DE3 amplitude at mid and high 
                         latitude shows a contrasting behavior with respect to the low 
                         latitude in the MLT i.e., a decrease in the amplitude at mid and 
                         high latitudes concurrent with an increase at low latitudes during 
                         the postwarming phase. SSW-related convective activity variability 
                         may explain the observed DE3 variability. In general, the SW2 
                         amplitude diminishes during the post-warming interval in the MLT, 
                         possibly due to the weakening and subsequent reversal of the zonal 
                         wind and reduction in ozone concentration. The present study 
                         entails the disparate responses between the local tidal dynamics 
                         at individual observational locations and the global tidal 
                         variability in connection with the SSW.",
  conference-location = "Kyoto, Japan",
      conference-year = "12-16 Sept. 2022",
             language = "en",
        urlaccessdate = "03 maio 2024"
}