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| Titel |
Air quality trends in Europe over the past decade: a first multi-model assessment |
| VerfasserIn |
A. Colette, C. Granier, Ø. Hodnebrog, H. Jakobs, A. Maurizi, A. Nyiri, B. Bessagnet, A. D'Angiola, M. D'Isidoro, M. Gauss, F. Meleux, M. Memmesheimer, A. Mieville, L. Rouïl, F. Russo, S. Solberg, F. Stordal, F. Tampieri |
| 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 ; 11, no. 22 ; Nr. 11, no. 22 (2011-11-22), S.11657-11678 |
| Datensatznummer |
250010212
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| Publikation (Nr.) |
 copernicus.org/acp-11-11657-2011.pdf |
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| Zusammenfassung |
We discuss the capability of current state-of-the-art chemistry and
transport models to reproduce air quality trends and interannual
variability. Documenting these strengths and weaknesses on the basis of
historical simulations is essential before the models are used to
investigate future air quality projections. To achieve this, a coordinated
modelling exercise was performed in the framework of the CityZEN European
Project. It involved six regional and global chemistry-transport models
(BOLCHEM, CHIMERE, EMEP, EURAD, OSLOCTM2 and MOZART) simulating air quality
over the past decade in the Western European anthropogenic emissions
hotspots.
Comparisons between models and observations allow assessing the skills of
the models to capture the trends in basic atmospheric constituents
(NO2, O3, and PM10). We find that the trends of primary
constituents are well reproduced (except in some countries – owing to their
sensitivity to the emission inventory) although capturing the more moderate
trends of secondary species such as O3 is more challenging. Apart from
the long term trend, the modelled monthly variability is consistent with the
observations but the year-to-year variability is generally underestimated.
A comparison of simulations where anthropogenic emissions are kept constant
is also investigated. We find that the magnitude of the emission-driven
trend exceeds the natural variability for primary compounds. We can thus
conclude that emission management strategies have had a significant impact
over the past 10 yr, hence supporting further emission reductions. |
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