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| Titel |
Overview of aerosol properties associated with air masses sampled by the ATR-42 during the EUCAARI campaign (2008) |
| VerfasserIn |
S. Crumeyrolle, A. Schwarzenboeck, J. C. Roger, K. Sellegri, J. F. Burkhart, A. Stohl, L. Gomes, B. Quennehen, G. Roberts, R. Weigel, P. Villani, J. M. Pichon, T. Bourrianne, P. Laj |
| 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. 9 ; Nr. 13, no. 9 (2013-05-14), S.4877-4893 |
| Datensatznummer |
250018646
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| Publikation (Nr.) |
 copernicus.org/acp-13-4877-2013.pdf |
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| Zusammenfassung |
Within the frame of the European Aerosol Cloud Climate and Air Quality
Interactions (EUCAARI) project, the Météo-France aircraft ATR-42
performed 22 research flights over central Europe and the North Sea during
the intensive observation period in May 2008. For the campaign, the ATR-42
was equipped to study the aerosol physical, chemical, hygroscopic and
optical properties, as well as cloud microphysics. For the 22 research
flights, retroplume analyses along the flight tracks were performed with
FLEXPART in order to classify air masses into five sectors of origin,
allowing for a qualitative evaluation of emission influence on the
respective air parcel.
This study shows that the extensive aerosol parameters (aerosol mass and
number concentrations) show vertical decreasing gradients and in some air
masses maximum mass concentrations (mainly organics) in an intermediate
layer (1–3 km). The observed mass concentrations (in the boundary layer (BL): between 10 and
30 μg m−3; lower free troposphere (LFT): 0.8 and 14 μg m−3) are high especially
in comparison with the 2015 European norms for PM2.5 (25 μg m−3)
and with previous airborne studies performed over England (Morgan et al.,
2009; McMeeking et al., 2012).
Particle number size distributions show a larger fraction of particles in
the accumulation size range in the LFT compared to BL. The chemical
composition of submicron aerosol particles is dominated by organics in the
BL, while ammonium sulphate dominates the submicron aerosols in the LFT,
especially in the aerosol particles originated from north-eastern Europe
(~ 80%), also experiencing nucleation events along the
transport. As a consequence, first the particle CCN acting ability, shown by
the CCN/CN ratio, and second the average values of the scattering
cross sections of optically active particles (i.e. scattering coefficient
divided by the optical active particle concentration) are increased in the
LFT compared to BL. |
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