Impact of different emission inventory on the modelled concentrations chemistry transport models over Europe

While the impacts of CO₂ and other well mixed greenhouse gases on continental to global scales are well understood, there are still gaps and uncertainties connected to the non-CO₂ forcers. One of the main goals of FOCI project is to improve our understanding of non-CO₂ forcers on climate, weather, air quality and health, such as short-lived gases and aerosols. To assess the long-term impact of these gases, we need first to find and understand uncertainties in simulations given by different emission sources.

In this study, we performed a set of simulations on 27 km domain over Europe with RegCM-Chem and WRF-Chem models with emission inputs based on different emission inventories, namely CAMS, EDGAR and EMEP. We analyzed differences in resulting tropospheric ozone, NO₂ and aerosol concentrations in selected time periods of 2015. We found significant differences in results that emerge from using different emission inputs.