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The main purpose of this study was to perform an evaluation of the particles opticalparameters influence on surface solar UV-B (280315 nm) irradiance in Córdoba,Argentina. To achieve this objective UV-B irradiance dataset, AERONET (AErosol ROboticNETwork) database, and TUV (Tropospheric Ultraviolet and Visible) model were used toanalyze the effects of aerosols on surface irradiance on cloudless days during specific daysof winter and spring of the period 19992006. Together with a direct observer, totalirradiance (3003000 nm) measurements were used as an ancillary tool to verify thecloudless condition. Every year, during this period, important reductions in surfaceirradiance are observed due to the aerosol load. Aerosols were incorporated in the modelthrough the aerosol optical depth at 340 nm, the asymmetry parameter at 440 nm, andthe single scattering albedo at 440 nm, all of them provided by AERONET Córdoba-CETTsite. These factors vary from near to zero up to 1.4, from 0.56 up to 0.83 and from 0.43 upto 0.99, respectively. The behaviors of these factors along the year are analyzedconsidering the meteorology of Córdoba. When AERONET data are included in the TUVmodel they allow an accurate simulation of the UV-B irradiance, making the agreementwith the experimental measurements substantially better. Only a small differences (  ±2%)remains, which can be attributed to diverse factors. As the AERONET site is 20 km awayfrom the irradiance measurement site, these results show the regional character of theaerosols in Córdoba, although small contributions of urban aerosols are not discarded. Anepisode of high aerosol and pollutants laden due to fires in the surrounding hills is brieflyanalyzed. A set of additional studies are needed to describe comprehensively thecharacteristics and behavior of the Córdoba aerosols. Some of them are being alreadycarried out.