@Article{TarasovaNobrEckHolb:2000:MoGaAe,
               author = "Tarasova, Tatiana Alekandrovna and Nobre, Carlos Afonso and Eck, 
                         Thomas F. and Holben, Brent N.",
          affiliation = "Instituto Nacional de Pesquisas Espaciais,(INPE/CPTEC) and 
                         Instituto Nacional de Pesquisas Espaciais,(INPE/CPTEC) and 
                         Ravtheon ITSS Corl>oration. NASA Goddard Space Flight Center, 
                         Greenbelt, Marvland and NASA Goddard Space Flight Center, 
                         Greenbelt, Marvland",
                title = "Modeling of gaseous, aerosol, and cloudiness effects on surface 
                         solar irradiance measured in Brazil's Amazonia 1992-1995",
              journal = "Revista Brasileira de Geof{\'{\i}}sica",
                 year = "2000",
               volume = "105",
               number = "D 22",
                pages = "26961--26969",
                month = "Nov.",
             keywords = "delta eddington approximation, radiation, weather, climate.",
             abstract = "The effects of water vapor, aerosol, and cloudiness on the 
                         incident surface solar irradiance continuously measured in 
                         Brazil's Amazonia at six observational sites from 1992 to 1995 are 
                         examined by means of a clear-sky broadband radiative transfer 
                         model. The aerosol optical depth and precipitable water, both 
                         retrieved from Sun photometer measurements, serve as inputs to the 
                         model. Computed monthly mean values of clear-sky surface 
                         irradiance are analyzed in conjunction with the monthly mean 
                         values of all-sky surface irradiance measured on the ground. To 
                         assess the effect of loudiness, we present the cloud radiative 
                         forcing and cloud radiative forcing ratio at the surface, both 
                         widely employed in cloud radiation budget studies, By its 
                         definition the monthly mean cloud radiative forcing (cloud 
                         radiative forcing; ratio)is the difference (ratio)between surface 
                         solar irradiances under all-sky an clear-sky conditions. The 
                         analysis of the irradiances, as computed and as measured, shows 
                         that during the wet season the gaseous and cloudiness effects on 
                         the! solar radiation attenuation in the a tmosphere are 
                         comparable, while the aerosol influence is much smaller. The 
                         aerosol effect increases and cloudiness effect decreases in the 
                         second half of the dry season. Thus during the biomass burning 
                         period ill southern Amazonia, the water vapor and aerosol effects 
                         become comparable, while the cloudiness impact is 2-3 times 
                         smaller. oth cloudiness and aerosol effects have strong seasonal 
                         variations, while the gaseous effect changes slightly throughout 
                         the year.",
           copyholder = "SID/SCD",
                 issn = "0102-261X",
                label = "10206",
             language = "en",
           targetfile = "Nobre_modeling.pdf",
        urlaccessdate = "17 jun. 2024"
}