@Article{MitraGuhBatBurMof:2023:InMLTi,
               author = "Mitra, G. and Guharay, A. and Batista, Paulo Prado and Buriti, R. 
                         A. and Moffat-Griffin, T.",
          affiliation = "Space and Atmospheric Sciences Division, Physical Research 
                         Laboratory, Ahmedabad, GJ, India and Space and Atmospheric 
                         Sciences Division, Physical Research Laboratory, Ahmedabad, GJ, 
                         India and {Instituto Nacional de Pesquisas Espaciais (INPE)} and 
                         {Universidade Federal de Campina Grande (UfCG)} and {British 
                         Antarctic Survey}",
                title = "Investigation on the MLT tidal variability during September 2019 
                         minor sudden stratospheric warming",
              journal = "Advances in Space Research",
                 year = "2023",
               volume = "71",
               number = "1",
                pages = "869--882",
                month = "Jan.",
             keywords = "Atmospheric tides, MLT dynamics, Sudden stratospheric warming.",
             abstract = "Tidal variability in the mesosphere and lower thermosphere (MLT) 
                         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 global reanalysis dataset. 
                         The polar warming is found to move from the mesosphere to the 
                         stratosphere until the peak warming day (PWD) of the SSW. The 
                         diurnal and semidiurnal tides at individual observational sites do 
                         not exhibit any consistent response during the observational 
                         interval, but a notable and consistent variability 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. Incidentally, the warming event occurs during 
                         Spring equinox when a dominant seasonal change in the tidal 
                         activities generally takes place and hence seasonal variability is 
                         also looked into while identifying the SSW impact during the 
                         observational interval. It is found that the seasonal broad 
                         changes in the DW1, DE3, and SW2 amplitudes can be explained by 
                         the variability in the tidal sources, i.e., water vapor, 
                         convective activity, ozone, etc during the observational period. 
                         However, the extracted short-term variability in the global tidal 
                         modes on removing seasonal trend reveals noticeable response in 
                         connection with the warming event. The deseasoned amplitude of the 
                         DW1 significantly enhances around the PWD at most of the present 
                         latitudes. The deseasoned DE3 amplitude responds significantly in 
                         the middle atmosphere at low latitudes during the warming phase. 
                         The deseasoned SW2 exhibit clear enhancement around the PWD at all 
                         the latitudes. However, the deseasoned tidal features do not seem 
                         to correlate well with that of the source species unlike the 
                         seasonal ones that imply involvement of complex processes during 
                         the warming event, seeking further future investigations in this 
                         regard.",
                  doi = "10.1016/j.asr.2022.08.017",
                  url = "http://dx.doi.org/10.1016/j.asr.2022.08.017",
                 issn = "0273-1177 and 1879-1948",
             language = "en",
           targetfile = "1-s2.0-S0273117722007359-main.pdf",
        urlaccessdate = "03 maio 2024"
}