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Investigating aerosol – radiation – cloud feedbacks under emission control strategies

pubblicazioni - Presentazione

Investigating aerosol – radiation – cloud feedbacks under emission control strategies

Questo studio indaga gli impatti sulla qualità dell’aria di interventi volti al controllo delle emissioni per mezzo del modello accoppiato WRF-Chem. In particolare, lo studio analizza gli effetti delle interazioni tra qualità dell’aria e meteorologia in presenza e valuta l’importanza di tali effetti nell’analisi di politiche di controllo delle emissioni di inquinanti in atmosfera.

Future scenario analysis are relevant instruments to compliance with national emission ceilings and legal requirements.However, potential reductions of anthropogenic emissions may be modulated by forthcoming changes in meteorological variables, which in turn are strongly influenced by aerosols and gaseous pollutants. In order to give a comprehensive picture of future environmental impacts, the coupled interactions between meteorology and air quality should be thus included in modelling studies.

To this aim the WRF-Chem on-line coupled model incorporates chemistry and meteorology in the same regional model thus allowing the evaluation of the aerosols effects on incoming solar radiation, cloud and precipitations and vice versa. This study investigates and compares the air quality impacts of emission-reduction over Italy to the year 2030 against the baseline simulation to the year 2010 by means of the WRF-Chem model.

Results demonstrated that energy strategies lead to a reduction of PM10 and PM2.5 air concentrations (5-15%). Moreover, PM10 and PM2.5 reductions were found to be more effective whether feedback effects are turned on.

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