traffic emissions modeling Articles
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WORM: A new open road line source model for low wind speed conditions
Emission from road traffic constitutes one of the most important sources of air pollution in urban areas. This paper describes a newly developed air pollution dispersion model for open roads and highways called WORM (Weak Wind Open Road Model), and give some results using this model at Nordbysletta, Norway, in the period 1 January 200215 April 2002. Generally, a good correspondence was found ...
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A dataset for the validation of flow and dispersion models at an urban intersection
Dispersion modelling concerning air pollution caused by road traffic is reduced to a two-dimensional problem within street canyons. However, significant pollution loads are also to be expected at intersections. In this case, three-dimensional flow and dispersion structures have to be considered. For the validation of models claimed to be applicable to intersections, measurements of meteorological ...
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Assessing the impact of particulate matter sources in the Milan urban area
The Chemical Mass Balance (CMB) receptor model of the US-EPA was applied to PM10 data obtained during a field study performed in the Milan urban area, including daily average concentrations, element and ion concentrations. Two chemical fingerprints were estimated to characterise total traffic emissions and diesel engine exhaust emissions. Four main source groups were identified: road traffic, ...
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Numerical simulations of the wind flow and ozone formation during the Heilbronn ozone experiment
The Heilbronn ozone experiment was aimed at investigating the impact of short-term local-scale interventions on peak ozone levels during summer smog periods. The measures taken were estimated to lead to considerable reductions of road traffic emissions, but to only smaller reductions of industrial emissions. Model simulations with the European Zooming Model (EZM) were performed for assessing the ...
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Hourly NOx concentrations and wind direction in the vicinity of a street intersection
This study relates NOxconcentrations and wind (speed and direction) measured inside an asymmetric street canyon, with ambient wind. The monitoring site is located near a street intersection. The wind measured at the domestic airport located in the city, near the coast, has been considered as ambient wind. Wind direction at the monitoring site inside the canyon is mainly from the E, NE, W and NW ...
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