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| Titel |
Seasonal distribution of aerosol properties over Europe and their impact on UV irradiance |
| VerfasserIn |
N. Y. Chubarova |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1867-1381
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Measurement Techniques ; 2, no. 2 ; Nr. 2, no. 2 (2009-10-26), S.593-608 |
| Datensatznummer |
250000571
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| Publikation (Nr.) |
 copernicus.org/amt-2-593-2009.pdf |
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| Zusammenfassung |
| Using the aerosol optical thickness at 550 nm (τ550) from MODIS
(collection 5) for the 2000–2008 period combined with the aerosol products
from the ground-based AERONET network since 1996, monthly mean values of key
aerosol parameters have been obtained with 1 degree resolution over Europe.
Additional tests have revealed a satisfactory quality of the MODIS data,
except in a few cases. Quality assured AERONET data are used for evaluating
the Angstrom exponent, single scattering albedo and asymmetry factor, and
for validating the final aerosol optical thickness in the UV spectral
region. A method for extrapolating the aerosol parameters into the UV
spectral region is discussed. The aerosol optical thickness distributions
are considered together with meteorological fields from
NOAA_NCEP_CPC_CAMS_ OPI climatology. The τ340 is shown
to vary significantly from approximately 0.01 to 0.9 depending on the season
and location. Permanent elevated aerosol loading over several industrial
areas is observed, which agrees with the output of chemical transport
models. Using radiative transfer modeling, monthly mean UV loss due to
aerosol was estimated. The absolute decrease in UV indices varies from less
than 0.1 to 1.5. The relative UV attenuation has large spatial and temporal
variations (−1%–−17%) with a minimum towards the northwest and
maxima over several southern local areas (Northern Italy, etc.) during the
warm period. |
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