Analysis of the impact of inhomogeneous emissions in the Operational Street Pollution Model (OSPM)

T. B. Ottosen, Konstantinos Kakosimos, C. Johansson, O. Hertel, J. Brandt, H. Skov, R. Berkowicz, T. Ellermann, S. S. Jensen, M. Ketzel

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)3231-3245
Number of pages15
JournalGeoscientific Model Development
Volume8
Issue number10
DOIs
Publication statusPublished - 13 Oct 2015

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Pollution
pollution
street canyon
Geometry
geometry
Model
analysis
Air Pollution
Air pollution
Inhomogeneity
Aspect ratio
Aspect Ratio
inhomogeneity
wind direction
Simplification
canyon
atmospheric pollution
Traffic
Entire
Requirements

ASJC Scopus subject areas

  • Modelling and Simulation
  • Earth and Planetary Sciences(all)

Cite this

Analysis of the impact of inhomogeneous emissions in the Operational Street Pollution Model (OSPM). / Ottosen, T. B.; Kakosimos, Konstantinos; Johansson, C.; Hertel, O.; Brandt, J.; Skov, H.; Berkowicz, R.; Ellermann, T.; Jensen, S. S.; Ketzel, M.

In: Geoscientific Model Development, Vol. 8, No. 10, 13.10.2015, p. 3231-3245.

Research output: Contribution to journalArticle

Ottosen, TB, Kakosimos, K, Johansson, C, Hertel, O, Brandt, J, Skov, H, Berkowicz, R, Ellermann, T, Jensen, SS & Ketzel, M 2015, 'Analysis of the impact of inhomogeneous emissions in the Operational Street Pollution Model (OSPM)', Geoscientific Model Development, vol. 8, no. 10, pp. 3231-3245. https://doi.org/10.5194/gmd-8-3231-2015
Ottosen, T. B. ; Kakosimos, Konstantinos ; Johansson, C. ; Hertel, O. ; Brandt, J. ; Skov, H. ; Berkowicz, R. ; Ellermann, T. ; Jensen, S. S. ; Ketzel, M. / Analysis of the impact of inhomogeneous emissions in the Operational Street Pollution Model (OSPM). In: Geoscientific Model Development. 2015 ; Vol. 8, No. 10. pp. 3231-3245.
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