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Article Dans Une Revue Transportation Research Part D: Transport and Environment Année : 2015

Atmospheric dispersion modeling near a roadway under calm meteorological conditions

Résumé

Atmospheric pollutant dispersion near sources is typically simulated by Gaussian models because of their efficient compromise between reasonable accuracy and manageable com- putational time. However, the standard Gaussian dispersion formula applies downwind of a source under advective conditions with a well-defined wind direction and cannot calculate air pollutant concentrations under calm conditions with fluctuating wind direction and/or upwind of the emission source. Attempts have been made to address atmospheric disper- sion under such conditions. This work evaluates the performance of standard and modified Gaussian plume models using measurements of NO2, PM10, PM2.5, five inorganic ions and seven metals conducted near a freeway in Grenoble, France, during 11-27 September 2011. The formulation for calm conditions significantly improves model performance. However, it appears that atmospheric dispersion due to vehicle-induced turbulence is still underestimated. Furthermore, model performance is poor for particulate species unless road dust resuspension by traffic is explicitly taken into account.
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Dates et versions

hal-01233492 , version 1 (25-11-2015)

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Masoud Fallah Shorshani, Christian Seigneur, Lucie Polo Rehn, Hervé Chanut, Yann Pellan, et al.. Atmospheric dispersion modeling near a roadway under calm meteorological conditions. Transportation Research Part D: Transport and Environment, 2015, 34, pp. 137-154. ⟨10.1016/j.trd.2014.10.013⟩. ⟨hal-01233492⟩
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