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| Titel |
Variability of aerosol properties over Eastern Europe observed from ground and satellites in the period from 2003 to 2011 |
| VerfasserIn |
A. Bovchaliuk, G. Milinevsky, V. Danylevsky, P. Goloub, O. Dubovik, A. Holdak, F. Ducos, M. Sosonkin |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1680-7316
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 13, no. 13 ; Nr. 13, no. 13 (2013-07-11), S.6587-6602 |
| Datensatznummer |
250018755
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| Publikation (Nr.) |
 copernicus.org/acp-13-6587-2013.pdf |
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| Zusammenfassung |
The paper presents some results of the study on aerosol variability in the
period from 2003 to 2011 over the Eastern Europe region, with latitude ranging
from 40° N to 60° N and longitude from 20° E to
50° E. The analysis was based on the POLDER/PARASOL and
POLDER-2/ADEOS satellites and AERONET (AErosol RObotic NETwork) ground-based
sun photometer observations. The aerosol optical thickness (AOT) of the
studied area is characterized by values (referenced to 870 nm
wavelength) ranging from 0.05 to 0.2, except for in the period of July–August 2010
with strong forest and peat wildfires when the AOT typical values range from
0.3 to 0.5 according to both retrievals. The analysis of seasonal dynamics of
aerosol loading has revealed two AOT high value peaks. The spring peak
observed in April–May is the result of solitary transportation of Saharan
dust in the atmosphere over Eastern Europe, infrequent agricultural fires,
transportation of sea salt aerosols by southern winds to Ukraine and Moldova
from the Black and Azov seas. The autumn peak in August–September is
associated with forest and peat wildfires, considerable transportation of
Saharan dust and the presence of soil dust aerosols due to harvesting activity.
The maximum values of AOT are observed in May 2006 (0.1–0.15), April 2009
(0.07–0.15) and August 2010 (0.2–0.5). Furthermore, the study has
identified a distinct pattern of anthropogenic aerosols over the industrial
areas, especially in central Ukraine and eastern Belarus as well as Moscow
region in Russia.
The comparison of the AOT derived by standard algorithm POLDER/PARASOL with
those recomputed from AERONET inversions for fine mode particles with radius
< 0.3 μm was performed over several AERONET sites. The
correlation coefficients for the POLDER/AERONET AOT retrieval comparisons are
equal: 0.78 for Moscow site, 0.76 – Minsk, 0.86 – Belsk, 0.81 – Moldova
(period 2005–2009), 0.93 – Kyiv and 0.63 for Sevastopol sites (2008–2009).
The deviations are explained by the spatial inhomogeneity of the surface
polarization that has a stronger effect on aerosol retrieval for clear
atmospheric conditions with low aerosol loading when surface impact on
satellite observations is more pronounced. In addition, the preliminary
analysis of the detailed aerosol properties derived by a new generation PARASOL
algorithm was evaluated. The comparison of AOT and single scattering albedo
retrieved from the POLDER/PARASOL observations over Kyiv with the closest AERONET
retrievals within 30 min of satellite overpass time and with a cloudless day
shows acceptable agreement of the aerosol dynamics. The correspondence of
those data is observed even for extreme AOT440 value 1.14, which was caused by
the forest and peat fires in August 2010. |
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