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| Titel |
Analysis of the impact of inhomogeneous emissions in the Operational Street Pollution Model (OSPM) |
| VerfasserIn |
T.-B. Ottosen, K. E. Kakosimos, C. Johansson, O. Hertel, J. Brandt, H. Skov, R. Berkowicz, T. Ellermann, S. S. Jensen, M. Ketzel |
| 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. 10 ; Nr. 8, no. 10 (2015-10-13), S.3231-3245 |
| Datensatznummer |
250116604
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| Publikation (Nr.) |
 copernicus.org/gmd-8-3231-2015.pdf |
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| Zusammenfassung |
| Semi-parameterized street canyon models, as e.g. the Operational Street
Pollution Model (OSPM®), have been
frequently applied for the last two decades to analyse levels and
consequences of air pollution in streets. These models are popular due to
their speed and low input requirements. One often-used simplification is the
assumption that emissions are homogeneously distributed in the entire length
and width of the street canyon. It is thus the aim of the present study to
analyse the impact of this assumption by implementing an inhomogeneous
emission geometry scheme in OSPM. The homogeneous and the inhomogeneous
emission geometry schemes are validated against two real-world cases:
Hornsgatan, Stockholm, a sloping street canyon; and Jagtvej, Copenhagen;
where the morning rush hour has more traffic on one lane compared to the
other. The two cases are supplemented with a theoretical calculation of the
impact of street aspect (height / width) ratio and emission inhomogeneity
on the concentrations resulting from inhomogeneous emissions. The results
show an improved performance for the inhomogeneous emission geometry over the
homogeneous emission geometry. Moreover, it is shown that the impact of
inhomogeneous emissions is largest for near-parallel wind directions and for
high aspect ratio canyons. The results from the real-world cases are however
confounded by challenges estimating the emissions accurately. |
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