@Article{MartinsPereStuh:2003:PaBiBu,
               author = "Martins, Fernando Ramos and Pereira, Enio Bueno and Stuhlmann, 
                         R.",
          affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)/CPTEC}",
                title = "Parameterization of biomass burning aerosolsin the BRAZIL-SR 
                         radiative transfer model",
              journal = "Geophysical Research Abstracts",
                 year = "2003",
               volume = "5",
               number = "00449",
                pages = "1--2",
                month = "apr.",
             keywords = "impacts aerosols, biomass burning, solar irradiation, radiative 
                         transfer model.",
             abstract = "This work describes the impact of the aerosols that are generated 
                         during biomass burning events in the solar irradiation, and 
                         presents a parameterization technique to improve the model 
                         estimations of the surface incident solar irradiation obtained by 
                         the BRASIL-SR radiative transfer model. It was verified that the 
                         mean systematic deviation error (MBE) of model estimates grows 
                         about 3 times and the value of root mean squared error (RMSE) 
                         duplicates in clear sky days for stations close to burned sites in 
                         central region of Brazil. The proximity of burned sites produces 
                         an increment of the same order of that produced by the presence of 
                         clouds in MBE. The parameterization technique of the biomass 
                         burning aerosols uses optical properties provided by {"}Global 
                         Aerosol Data Set{"} (GADS) and it is in accordance with 
                         measurements values obtained in two field missions: TRACE-A (1992) 
                         and SCAR-B (1995). Three different compositions were used in this 
                         study and the difference among them is the ratio of black carbon 
                         present in the aerosols: 5%, 7.8% and 10% of black carbon. These 
                         values are within the range of measured values observed in the 
                         field missions: from 4% to 12%. The aerosol profile and spatial 
                         distribution was obtained from a transport model for estimation of 
                         tracers spreading from biomass burning areas developed at 
                         INPE-CPTEC. The surface incident solar irradiation estimates, 
                         obtained with new aerosol parameterization, presented smaller 
                         systematic deviations in all the stations used in the validation 
                         process. The correlation among estimated and measured values for 
                         surface incident solar radiation grew about 2,5 times by adopting 
                         a composition with 5% of elementary carbon. The validation 
                         procedure showed that the improvements in aerosol parameterization 
                         allowed for better estimates by the model. However, the 
                         improvements are still masked by limitation imposed by the 
                         availability of only tri-hourly image schedules for the GOES-8 
                         satellite in Southern Hemisphere. Acknowledgements This work was 
                         possible thanks to the financial help of FAPESP through a 
                         scholarship. We also thank, CPTEC for the continuous support in 
                         satellite and ancillary products, and to LABSOLAR for rewarding 
                         long time collaboration.",
           copyholder = "SID/SCD",
                 issn = "1029-7006",
             language = "en",
           targetfile = "Martins_Parameterization.pdf",
        urlaccessdate = "08 maio 2024"
}