INFIQC   05475
INSTITUTO DE INVESTIGACIONES EN FISICO- QUIMICA DE CORDOBA
Unidad Ejecutora - UE
artículos
Título:
Using the optical properties of aerosols from the AERONET database to calculate surface solar UV-B irradiance in Córdoba, Argentina. Comparison with measurements.
Autor/es:
GEORGINA C. ANDRADA, GUSTAVO G. PALANCAR AND BEATRIZ M. TOSELLI
Revista:
ATMOSPHERIC ENVIRONMENT
Referencias:
Año: 2008
ISSN:
1352-2310
Resumen:
The main purpose of this study was to perform an evaluation of the particles optical
parameters influence on surface solar UV-B (280315 nm) irradiance in Co´ rdoba,
Argentina. To achieve this objective UV-B irradiance dataset, AERONET (AErosol RObotic
NETwork) database, and TUV (Tropospheric Ultraviolet and Visible) model were used to
analyze the effects of aerosols on surface irradiance on cloudless days during specific days
of winter and spring of the period 19992006. Together with a direct observer, total
irradiance (3003000 nm) measurements were used as an ancillary tool to verify the
cloudless condition. Every year, during this period, important reductions in surface
irradiance are observed due to the aerosol load. Aerosols were incorporated in the model
through the aerosol optical depth at 340 nm, the asymmetry parameter at 440 nm, and
the single scattering albedo at 440 nm, all of them provided by AERONET Co´ rdoba-CETT
site. These factors vary from near to zero up to 1.4, from 0.56 up to 0.83 and from 0.43 up
to 0.99, respectively. The behaviors of these factors along the year are analyzed
considering the meteorology of Co´ rdoba. When AERONET data are included in the TUV
model they allow an accurate simulation of the UV-B irradiance, making the agreement
with the experimental measurements substantially better. Only a small differences (72%)
remains, which can be attributed to diverse factors. As the AERONET site is 20km away
from the irradiance measurement site, these results show the regional character of the
aerosols in Co´ rdoba, although small contributions of urban aerosols are not discarded. An
episode of high aerosol and pollutants laden due to fires in the surrounding hills is briefly
analyzed. A set of additional studies are needed to describe comprehensively the
characteristics and behavior of the Co´ rdoba aerosols. Some of them are being already
carried out.72%)
remains, which can be attributed to diverse factors. As the AERONET site is 20km away
from the irradiance measurement site, these results show the regional character of the
aerosols in Co´ rdoba, although small contributions of urban aerosols are not discarded. An
episode of high aerosol and pollutants laden due to fires in the surrounding hills is briefly
analyzed. A set of additional studies are needed to describe comprehensively the
characteristics and behavior of the Co´ rdoba aerosols. Some of them are being already
carried out.