author = "Guharay, Amitava and Batista, Paulo Prado and Buriti, Ricardo 
                         Arlen and Schuch, Nelson Jorge",
          affiliation = "Space and Atmospheric Sciences Division, Physical Research 
                         Laboratory, Ahmedabad and {Instituto Nacional de Pesquisas 
                         Espaciais (INPE)} and {Universidade Federal de Campina Grande 
                         (UFCG)} and {Instituto Nacional de Pesquisas Espaciais (INPE)}",
                title = "On the variability of the quarter-diurnal tide in the MLT over 
                         Brazilian low-latitude stations",
              journal = "Earth Planets and Space",
                 year = "2018",
               volume = "70",
                pages = "e140",
                month = "Aug.",
             keywords = "Quarterdiurnal tide, Mesosphere and lower thermosphere, Meteor 
                         radar observations.",
             abstract = "The characteristic features of the quarterdiurnal tide (QDT) in 
                         the mesosphere and lower thermosphere (MLT) are investigated using 
                         meteor radar observations from three low-latitude southern 
                         hemispheric stations, Sao Joao do Cariri (7.4 degrees S, 36.5 
                         degrees W), Cachoeira Paulista (22.7 degrees S, 45 degrees W) and 
                         Santa Maria (29.7 degrees S, 53.7 degrees W) in 2005. The QDT 
                         shows consistent appearance with a weak enhancement during late 
                         summer and fall interval. The QDT amplitudes are found to be much 
                         smaller (<3 m/s) than the longer period tidal components most of 
                         the times of the year consistent with the previous investigations 
                         carried out from various locations over the globe. The vertical 
                         wavelength is found to reach up to 80 km in the MLT maximizing in 
                         winter although most of the times it remains within 20 km. 
                         Therefore, based on the observed characteristics of the QDT, it is 
                         surmised that both the migrating and nonmigrating components are 
                         involved in manifestation of the QDT at present locations. Further 
                         detailed investigations are sought in connection with the 
                         important issues pertained to the actual excitation mechanisms and 
                         existing dominant QDT modes in the low-latitude MLT.",
                  doi = "10.1186/s40623-018-0910-9",
                  url = "http://dx.doi.org/10.1186/s40623-018-0910-9",
                 issn = "1880-5981",
             language = "en",
           targetfile = "guharay_on.pdf",
        urlaccessdate = "04 dez. 2020"