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Evaluation of dispersion models for an urban environment: an example from Stockholm, Sweden
SMHI, Professional Services.
1997 (English)In: International Journal of Environment and Pollution, ISSN 0957-4352, E-ISSN 1741-5101, Vol. 8, no 3-6, 638-645 p.Article in journal (Refereed) Published
Abstract [en]

An air quality management system has been in operational use in the city of Stockholm, Sweden, for several years. In the system there are, in addition to databases for measurements of air pollution and meteorological parameters and emission data, several dispersion models. The models include a Gaussian and a Eulerian (grid) type of dispersion model. An evaluation of the Gaussian and the grid models for Stockholm has been carried out. Simulated concentrations of nitrogen oxides, NOx, have been compared with measured NOx concentrations at three measuring stations in central parts of the city. The evaluation was based on comparisons between measured and simulated concentrations in two time-series, a summer week and a winter week, and between two seasonal simulations, a summer and a winter seasonal average and extreme concentrations. It was noted that the mean difference between the measured and the simulated concentrations during all trials varied from a few percent up to 60%. It was also noted that the differences for the seasonal averages and 98-percentile decreased considerably when the simulated value was picked from the gridpoint with best agreement with the measured value, inside a circle with a radius of one grid distance from the measuring station.

Place, publisher, year, edition, pages
1997. Vol. 8, no 3-6, 638-645 p.
Keyword [en]
dispersion modelling, model evaluation, urban environment
National Category
Meteorology and Atmospheric Sciences
Research subject
Remote sensing
Identifiers
URN: urn:nbn:se:smhi:diva-1567ISI: 000071699500046OAI: oai:DiVA.org:smhi-1567DiVA: diva2:850664
Conference
4th Workshop on Harmonization with Atmospheric Dispersion Modelling for Regulatory Purposes, MAY 06-09, 1996, OOSTENDE, BELGIUM
Available from: 2015-09-02 Created: 2015-08-31 Last updated: 2015-09-02Bibliographically approved

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Citation style
  • apa
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