author = "Giongo, Gabriel Augusto and Bageston, Jos{\'e} Valentin and 
                         Figueiredo, Cosme Alexandre Oliveira Barros and Wrasse, Cristiano 
                         Max and Kam, Hosik and Kim, Yong Ha and Schuch, Nelson Jorge",
          affiliation = "{Universidade Federal de Santa Maria (UFSM)} and {Instituto 
                         Nacional de Pesquisas Espaciais (INPE)} and {Instituto Nacional de 
                         Pesquisas Espaciais (INPE)} and {Instituto Nacional de Pesquisas 
                         Espaciais (INPE)} and {Chungnam National University (CNU)} and 
                         {Chungnam National University (CNU)} and {Instituto Nacional de 
                         Pesquisas Espaciais (INPE)}",
                title = "Gravity wave investigations over Comandante Ferraz Antarctic 
                         Station in 2017: General characteristics, wind filtering and case 
              journal = "Atmosphere",
                 year = "2020",
               volume = "11",
               number = "8",
                pages = "e3784",
                month = "Aug.",
             keywords = "airglow, atmospheric gravity waves, winds, blocking diagram, ray 
             abstract = "This work presents the characteristics of gravity waves observed 
                         over Comandante Ferraz Antarctic Station (EACF: 62.1\◦ S, 
                         58.4\◦ W). A total of 122 gravity waves were observed in 34 
                         nights from March to October 2017, and their parameters were 
                         obtained by using the Fourier Transform spectral analysis. The 
                         majority of the observed waves presented horizontal wavelength 
                         ranging from 15 to 35 km, period from 5 to 20 min, and horizontal 
                         phase speed from 10 to 70  2 m  s \−1 . The propagation 
                         direction showed an anisotropic condition, with the slower wave 
                         propagating mainly to the west, northwest and southeast 
                         directions, while the faster waves propagate to the east, 
                         southeast and south. Blocking diagrams for the period of AprilJuly 
                         showed a good agreement between the wave propagation direction and 
                         the blocking positions, which are eastward oriented while the 
                         waves propagate mainly westward. A case study to investigate wave 
                         sources was conducted for the night of 2021 July, wherein eight 
                         small-scale and one medium-scale gravity waves were identified. 
                         Reverse ray tracing model was used to investigate the gravity wave 
                         source, and the results showed that six among eight small-scale 
                         gravity waves were generated in the mesosphere. On the other hand, 
                         only two small-scale waves and the medium-scale gravity wave had 
                         likely tropospheric or stratospheric origin, however, they could 
                         not be associated with any reliable source.",
                  doi = "10.3390/ATMOS11080880",
                  url = "http://dx.doi.org/10.3390/ATMOS11080880",
                 issn = "2073-4433",
             language = "en",
           targetfile = "giongo_gravity.pdf",
        urlaccessdate = "14 abr. 2021"