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| Titel |
High-resolution air quality simulation over Europe with the chemistry transport model CHIMERE |
| VerfasserIn |
E. Terrenoire, B. Bessagnet, L. Rouïl, F. Tognet, G. Pirovano, L. Létinois, M. Beauchamp, A. Colette, P. Thunis, M. Amann, L. Menut |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1991-959X
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| Digitales Dokument |
URL |
| Erschienen |
In: Geoscientific Model Development ; 8, no. 1 ; Nr. 8, no. 1 (2015-01-14), S.21-42 |
| Datensatznummer |
250116027
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| Publikation (Nr.) |
 copernicus.org/gmd-8-21-2015.pdf |
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| Zusammenfassung |
| A modified version of CHIMERE 2009, including new methodologies in
emissions modelling and an urban correction, is used to perform a simulation
at high resolution (0.125° × 0.0625°) over Europe
for the year 2009. The model reproduces the temporal variability of NO2,
O3, PM10, PM2.5 better at rural (RB) than urban (UB)
background stations, with yearly correlation values for the different
pollutants ranging between 0.62 and 0.77 at RB sites and between
0.52 and 0.73 at UB sites. Also, the fractional biases (FBs) show that the model performs slightly better at RB sites than at UB sites for NO2 (RB = −33.9%,
UB = −53.6%), O3 (RB = 20.1%, UB = 25.2%) and PM10 (RB = −5.50%, UB = −20.1%). The difficulties for the
model in reproducing NO2 concentrations can be attributed to the general
underestimation of NOx emissions as well as to the adopted
horizontal resolution, which represents only partially the spatial gradient of
the emissions over medium-size and small cities. The overestimation of O3 by
the model is related to the NO2 underestimation and the overestimated
O3 concentrations of the lateral boundary conditions. At UB sites,
CHIMERE reproduces PM2.5 better than PM10. This is primarily the
result of an underestimation of coarse particulate matter (PM) associated with
uncertainties in secondary organic aerosol (SOA) chemistry and its precursor emissions (Po valley and
Mediterranean basin), dust (south of Spain) and sea salt (western Europe).
The results suggest that future work should focus on the development of national bottom-up emission inventories including a better account for semi-volatile organic compounds and their conversion to SOA, the improvement of the CHIMERE urban parameterization, the introduction into CHIMERE of the coarse nitrate chemistry and an advanced parameterization accounting for windblown dust emissions. |
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