Keywords: air pollution, air quality modelling, photochemistry, secondary pollution, Italy, pollution modelling, airborne dispersion, chemical reactions, emission inventories, spatial resolution, aerosol modelling, environmental pollution
Annual simulation of secondary pollution over northern Italy
A secondary pollution modelling system for simulating airborne dispersion and chemical reactions is applied over a regional scale domain located in the North-West of Italy, where urban and industrial areas are present. It was found an overestimation of NO
2in the urban areas, probably due to an underestimation of the vertical diffusivity; the analysis of O
Xconfirms that the discrepancies in O
2are mainly due to local scale effects; the model shows a general underestimation of the observed PM10 concentrations due to the uncertainties in the emission inventories, spatial resolution, and the adopted aerosol modelling approach.