@InProceedings{SouzaCebaSilv:2009:SuAlAs,
               author = "Souza, Juarez D. de and Ceballos, Juan Carlos and Silva, Bernardo 
                         B. da",
          affiliation = "{} and {Instituto Nacional de Pesquisas Espaciais (INPE)}",
                title = "Surface albedo assessment in clear sky and dense smoke atmospheres 
                         using a shortwave radiation stochastic model and MODIS 1B image",
            booktitle = "Proceedings...",
                 year = "2009",
                pages = "105--108",
         organization = "AIP International Radiation Symposium (IRC/IAMAS).",
            publisher = "AIP",
              address = "Melville, NY",
             keywords = "two-flux, stochastic, albedo, irradiance.",
             abstract = "The surface albedo, which is a fundamental parameter in the 
                         estimation of the radiation balance, corresponds to the 
                         reflectance integrated in the solar spectrum. It can be obtained 
                         through satellite images that have great spatial coverage. A 
                         stochastic model of two-flux, presented by Ceballos [1] and 
                         developed by Souza and Ceballos [2], is used to establish a direct 
                         relationship between the reflectance of the surface and the 
                         radiance measured by MODIS-Terra/Aqua sensor. The propagation of 
                         radiation, in the solar spectrum from 0.3 to 3.0 {\`{\i}}m, is 
                         described by an scheme of 16 layers. In such scheme, it is 
                         obtained the necessary parameters to establish the radiation 
                         balance in the top of the atmosphere. The optical properties of 
                         the atmospheric layers are defined by aerosol, ozone and water 
                         vapor. In this way, to determine the surface albedo, it is 
                         considered that the radiance originated from the system 
                         earth-atmosphere, measured by the satellite, is isotropic. A 
                         simple adjustment factor is introduced to compensate anisotropic 
                         and multiple reflections effects between the surface and the 
                         atmosphere. An application for Amazonian region in conditions of 
                         low and high aerosol load due to smoke caused by forest burning, 
                         is presented. The results show similarity in the assessed surface 
                         reflectance, with and without burning in the region.",
  conference-location = "Foz do Igua{\c{c}}u",
      conference-year = "3-8 Aug.",
                  doi = "10.1063/1.3116924",
                  url = "http://dx.doi.org/10.1063/1.3116924",
             language = "en",
           targetfile = "Souzaetal_albedosmoky_IRS08.pdf",
               volume = "1100",
        urlaccessdate = "30 abr. 2024"
}