Comparison of model predictions and measurements near a major road in an urban area
by J. Harkonen, J. Walden, J. Kukkonen
International Journal of Environment and Pollution (IJEP), Vol. 8, No. 3/4/5/6, 1997

Abstract: We have compared measured concentration data with predictions from a dispersion modelling system. The measurement campaign was conducted near a major road in the Helsinki Metropolitan area during two months of 1994. The concentrations of five gaseous pollutants (NO, NO₂, O₃, CO and SO₂) were measured at three heights, together with the simultaneous measurement of traffic densities and the relevant meteorological parameters. The dispersion modelling system includes the road network dispersion model CAR-FMI, a meteorological pre-processing model, and a model for evaluating the urban background concentrations. The overall agreement of the model predictions and measured data for NO_x, NO₂ and O₃ was reasonably good, although the modelling system slightly underestimated both the NO₂ and O₃ concentrations.

Online publication date: Tue, 15-Sep-2009

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