@Article{MedeirosTaBuFeWrGo:2007:MLGrWa,
               author = "Medeiros, A. F. and Takahashi, Hisao and Buriti, R. A. and 
                         Fechine, Joaquim and Wrasse, Cristiano Max and Gobbi, Delano",
          affiliation = "{Universidade Federal de Campina Grande (UFCG)} and {Instituto 
                         Nacional de Pesquisas Espaciais (INPE)} and {} and {Instituto 
                         Nacional de Pesquisas Espaciais (INPE)} and {Instituto Nacional de 
                         Pesquisas Espaciais (INPE)} and {Instituto Nacional de Pesquisas 
                         Espaciais (INPE)}",
                title = "MLT gravity wave climatology in the South America equatorial 
                         region observed by airglow imager",
              journal = "Annales Geophysicae",
                 year = "2007",
               volume = "25",
                pages = "399--406",
             keywords = "Atmospheric composition and structure, Airglow and aurora, 
                         Instruments and techniques, Space plasma physics, Wave-particle 
                         interactions, ASTROF{\`{\I}}SICA.",
             abstract = "An all-sky CCD imager for OH, O-2 and OI (557.7 nm) airglow 
                         emission measurements was operated at Sao Joao do Cariri (Cariri), 
                         Brazil (7 degrees S, 36 degrees W), from October 2000 to December 
                         2004. A large amount of image data, more than 3000 h of 
                         observation and around 1000 wave events, makes it possible to 
                         classify the gravity wave characteristics, which are statistically 
                         significant. The observed waves show a typically short horizontal 
                         wavelength (545 km) and a short period (5-35 min), and horizontal 
                         phase speeds of 1 to 80 m/s. In most cases band-type waves 
                         (horizontal wavelength between 10 and 60 km) showed a clear 
                         preference for the horizontal propagation direction from the South 
                         American continent to the Atlantic Ocean. Ripples also have 
                         similar features but with different anisotropy. In this paper we 
                         focus our discussion on the wave characteristics of the bands and 
                         ripples and a comparison between them.",
           copyholder = "SID/SCD",
                 issn = "0992-7689",
             language = "en",
           targetfile = "MLT gravity.pdf",
        urlaccessdate = "20 maio 2024"
}