@Article{BrhianRiRoAbAbCa:2024:SuGrWa,
               author = "Brhian, Alysson and Ridenti, Marco A. and Roberto, Marisa and 
                         Abreu, Alessandro Jos{\'e} de and Abalde, Jos{\'e} Ricardo and 
                         Campos, Elson de",
          affiliation = "{Instituto Tecnol{\'o}gico de Aeron{\'a}utica (ITA)} and 
                         {Instituto Tecnol{\'o}gico de Aeron{\'a}utica (ITA)} and 
                         {Instituto Tecnol{\'o}gico de Aeron{\'a}utica (ITA)} and 
                         {Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto 
                         Nacional de Pesquisas Espaciais (INPE)} and {Escola de 
                         Especialistas de Aeron{\'a}utica (EEAR)}",
                title = "A Survey on Gravity Waves in the Brazilian Sector Based on 
                         Radiosonde Measurements From 32 Aerodromes",
              journal = "Journal of Geophysical Research: Atmospheres",
                 year = "2024",
               volume = "129",
               number = "7",
                pages = "e2023JD039811",
                month = "Apr.",
             keywords = "gravity wave, lower stratosphere, radiosonde, troposphere.",
             abstract = "In this paper, we applied a variety of statistical methods to 
                         study gravity waves in the troposphere and lower stratosphere in 
                         the Brazilian sector, using a large database from Instituto de 
                         Controle do Espa{\c{c}}o A{\'e}reo (ICEA) of radiosonde 
                         measurements carried out in 2014 at 32 locations in the Brazilian 
                         territory totaling 49,652 wind and temperature profiles. The 
                         average wind profiles were computed and classified by means of a 
                         hierarchical cluster analysis. The kinetic and potential energy 
                         densities of gravity waves were determined using a detrending 
                         technique based on the Least Squares Method and the Fast Fourier 
                         Transform. By analyzing the energy density time series it was 
                         found that tropospheric average values are consistently larger in 
                         the months of winter, late autumn and early spring. Stratospheric 
                         average values of variability and kinetic energy density are also 
                         consistently larger in this period. A systematic search for quasi 
                         monochromatic waves was carried out and their main characteristics 
                         such as horizontal/vertical wavelengths and velocities were 
                         determined both in the troposphere and lower stratosphere. A 
                         correlation analysis between the troposphere and the lower 
                         stratosphere based on the measured parameters was used to 
                         investigate the wave coupling between the two layers, and no 
                         significant correlation was found. Finally, a spatial correlation 
                         analysis between energy densities measured at different aerodromes 
                         in the same atmospheric layer was carried out, showing that energy 
                         densities are spatially correlated for distances less than 
                         3,0004,000 km.",
                  doi = "10.1029/2023JD039811",
                  url = "http://dx.doi.org/10.1029/2023JD039811",
                 issn = "2169-8996 and 2169-897X",
             language = "en",
           targetfile = "JGR Atmospheres - 2024 - Brhian - A Survey on Gravity Waves in the 
                         Brazilian Sector Based on Radiosonde Measurements From.pdf",
        urlaccessdate = "20 maio 2024"
}