Inter-comparison between modelled and measured key pollutants concentrations

Modelled concentrations of the key pollutants such as UFP NOx and SOx will be compared to those measured in WP4 at the two airports Particular attention will be given to resolve differences between modelled values which only consider emissions from aircraft main engines and APU while the measured concentrations include contributions from other airport sources and the background Therefore suitable schemes will be applied for a meaningful comparison including upwinddownwind measurements correlations with wind direction polar plots and information from background stations