Abstract
A computational system composed of a three dimensional (3D) mesoscale model and a Lagrangian stochastic model is applied to forecast the boundary layer dynamics and Carbon Oxide (CO) air concentrations from motor vehicle emissions in the Rome urban area over the Lazio region of Italy. The model results show a general good agreement with observations at one location near Rome. The simulation indicates that the regional airflow circulation and the pollutant transport are strongly influenced by the land and sea breeze regimes associated with the Tyrrhenian Sea as well as by the slope flows originating from the elevated mountain ridges that characterise the investigated area. The role played by the Urban Heat Island (UHI) on the CO concentration levels in the Rome area is also investigated.
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