The emissions, dispersion and chemical transformation of traffic-originated nitrogen oxides in the Helsinki metropolitan area
by An Karppinen, Jaakko Kukkonen, Mervi Konttinen, Jan Harkonen, Erkki, Rantakrans, Esko Valkonen, Tarja Koskentalo, Timo Elolahde
International Journal of Vehicle Design (IJVD), Vol. 20, No. 1/2/3/4, 1998

Abstract: We have developed a modelling system for evaluating the emissions, dispersion and chemical transformation of nitrogen oxides from traffic. This paper presents an application of the system for estimating the NO₂ and NO_x concentrations in the Helsinki metropolitan area in 1993. The highest concentrations of NO₂ are located in the vicinity of the main roads and streets, and in the downtown area of Helsinki. The model predictions were compared with the results of the urban air quality measurement network of the Helsinki Metropolitan Area Council. The predicted annual average concentrations and statistical concentration parameters of NO₂ agree well with the measured data.

Online publication date: Mon, 18-Aug-2003

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