ATMOSPHERIC AEROSOL INFLUENCE ON SOLAR RESOURCE ASSESSMENT
EXPERIMENTS IN RADIATIVE TRANSFER MODEL
DOI:
https://doi.org/10.59627/cbens.2012.2300Keywords:
Atmospheric Aerosols, Solar Energy, Horizontal VisibilityAbstract
The radiative transfer model BRASIL-SR is the main resource used by the Research Group on Bioenergy and Renewable Resources of the CCST / INPE in solar energy assessment, but the atmospheric aerosols are not adequately represented due to the use of mean monthly climatological horizontal visibility. These values were updated using two different methodologies: horizontal visibility observed at airports in South America and horizontal visibility estimates performed using data from the aerosol optical thickness at 550 nm, from CATT-BRAMS model. As expected, the two sets of horizontal visibility presented lower horizontal visibility in September and highest values in March, led to the horizontal visibility observed monthly mean values ranging between 13 km and 6 km, while the estimates of horizontal visibility through data CATT-BRAMS model resulted in values of greater amplitude, between 150 and 3 km. Were performed three different simulations for the months of March, June, September and December of years 2006, 2007 and 2008, using the original horizontal visibility, observed horizontal visibility and estimated horizontal visibility to evaluating the behavior of the model and its ability to represent the seasonal aerosols. The simulations that used the data of horizontal visibility observed at airports reported greater improvements in the values of global irradiation estimates, with decreases in the values of bias that came to be the order of 3%, 4% and 3% for the years 2006, 2007 and 2008, respectively. The simulation results with the estimated horizontal visibility performed data were better in the months and in regions where there was a high aerosol loading, for example, the central-north, in the month of September. For these cases, there were decreases of bias and RMSE over 11%.
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References
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