@InProceedings{WrasseFeMeBaDe:2008:GrWaSo,
               author = "Wrasse, C. M. and Fechine, J. and Takahashi and Medeiros, A. F. 
                         and Bageston, Jos{\'e} Valentin and Denardini, Cl{\'e}zio 
                         Marcos",
          affiliation = "{Universidade do Vale do Para{\'{\i}}ba} and {Universidade 
                         Federal de Campina Grande} and {Instituto Nacional de Pesquisas 
                         Espaciais (INPE)} and {Universidade Federal Campina Grande} and 
                         {Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto 
                         Nacional de Pesquisas Espaciais (INPE)}",
                title = "Gravity waves sources in the Brazilian equatorial region during 
                         SpreadFEX campaign",
            booktitle = "Abstracts...",
                 year = "2008",
         organization = "International Symposium on Equatorial Aeronomy, 12.",
             abstract = "Gravity waves in the mesosphere were observed by airglow all-sky 
                         imaging technique at S{\~a}o Jo{\~a}o do Cariri (7ºS, 36ºW) from 
                         September to November 2005, during SpreadFEX campaign carried out 
                         in Brazil. A reverse ray tracing method was used to find out wave 
                         source region and to study propagation process through the middle 
                         atmosphere. Ray tracing results showed that the wave source 
                         regions in the troposphere are located 500 km away from the 
                         observation site mainly in NW and SW side of the observatory. 
                         Tropospheric sources were related with the cloud activity observed 
                         in the infrared images taken by METEOSAT satellite. Wind field and 
                         Omega (Pa/s) parameter was used to study a special case of a 
                         gravity wave with a horizontal wavelength of 120 km and period of 
                         42 minutes. The results showed that the source location of this 
                         wave is located at NW site of the observatory, distant more than 
                         700 km away. Source region found with the ray tracing technique is 
                         in good agreement with the observational data taken by the 
                         infrared images, wind field and Omega (Pa/s). The possible 
                         generation mechanism for this wave could be attributed to the 
                         dynamic instability caused mainly due to the vertical wind shear 
                         observed in the Omega data.",
  conference-location = "Crete, Greece",
      conference-year = "18-24 may",
                label = "self-archiving-INPE-MCTIC-GOV-BR",
             language = "en",
           targetfile = "wrasse_gravity.pdf",
        urlaccessdate = "12 maio 2024"
}