Air pollution and meteorological data from up to 15 days before the study period (February 10 - March 10) for each Lombardy province as collected by the monitoring stations of the Regional Environmental Protection Agency (ARPA) network were analyzed (ARPA, 2020).
Air pollution variables were: particulate matter with an aerodynamic diameter of less than 10 μm (PM10) and 2.5 μm (PM2.5), nitrogen dioxide (NO2), sulphur dioxide (SO2) and ozone (O3). PM10 and PM2.5 were analyzed as daily mean concentration for each monitoring station. The measurements were performed using a chemical transport model (Silibello et al., 2008).
The climatic variables were analyzed as daily mean values of temperature (°C), percentage relative humidity (RH%), wind speed (Km/h), and precipitation (mm) as cumulative daily value for each monitoring station.
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