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| Titel |
Transport of anthropogenic and biomass burning aerosols from Europe to the Arctic during spring 2008 |
| VerfasserIn |
L. Marelle, J.-C. Raut, J. L. Thomas, K. S. Law, B. Quennehen, G. Ancellet, J. Pelon, A. Schwarzenboeck, J. D. Fast |
| 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 ; 15, no. 7 ; Nr. 15, no. 7 (2015-04-10), S.3831-3850 |
| Datensatznummer |
250119622
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| Publikation (Nr.) |
 copernicus.org/acp-15-3831-2015.pdf |
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| Zusammenfassung |
| During the POLARCAT-France airborne campaign in April 2008,
pollution originating from anthropogenic and biomass burning
emissions was measured in the European Arctic. We compare these
aircraft measurements with simulations using the WRF-Chem model to
investigate model representation of aerosols transported from Europe
to the Arctic. Modeled PM2.5 is evaluated using European Monitoring and Evaluation Programme (EMEP)
measurements in source regions and POLARCAT aircraft measurements in
the Scandinavian Arctic. Total PM2.5 agrees well with the measurements, although the
model overestimates nitrate and underestimates organic carbon in
source regions. Using WRF-Chem in combination with the Lagrangian
model FLEXPART-WRF, we find that during the campaign the research
aircraft sampled two different types of European plumes: mixed
anthropogenic and fire plumes from eastern Europe and Russia
transported below 2 km, and anthropogenic plumes from
central Europe uplifted by warm conveyor belt circulations to
5–6 km. Both modeled plume types had undergone significant wet
scavenging (> 50% PM10) during transport.
Modeled aerosol vertical distributions and optical properties below the
aircraft are evaluated in the Arctic using airborne lidar measurements. Model
results show that the pollution event transported aerosols into the Arctic
(> 66.6° N) for a 4-day period. During this 4-day period, biomass
burning emissions have the strongest influence on concentrations between 2.5
and 3 km altitudes, while European anthropogenic emissions influence
aerosols at both lower (~ 1.5 km) and higher altitudes
(~ 4.5 km). As a proportion of PM2.5, modeled black
carbon and SO4= concentrations are more enhanced near the surface in anthropogenic plumes.
The European plumes sampled during the POLARCAT-France campaign were
transported over the region of springtime snow cover in northern
Scandinavia, where they had a significant local atmospheric warming
effect. We find that, during this transport event, the average
modeled top-of-atmosphere (TOA) shortwave direct and semi-direct
radiative effect (DSRE) north of 60° N over snow and
ice-covered surfaces reaches +0.58 W m−2, peaking at
+3.3 W m−2 at noon over Scandinavia and Finland. |
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