Modelling past and future O3 and PM2.5 surface levels over Europe under various emission scenarios 

<p>We have used the Danish Eulerian Hemispheric Model (DEHM), offline-coupled with the Weather Research and Forecast model (WRF) to model the ozone (O3) and fine particulate matter (PM2.5) surface levels over Europe in the period 1981-2050. Several future emission projections adopted from the Coupled Model Intercomparison Project Phase 6 (CMIP6) have been used to simulate the O3 and PM2.5 levels in the 2015-2050 period. Results showed that under the high emission mitigation scenario (SSP1-2.6), surface O3 and PM2.5 levels will decrease by up to 20% and 80%, respectively, compared to the 2015 levels, while middle-of-the-road scenario (SSP2-4.5) will lead to a 3% and 60% decrease in O3 and PM2.5 levels, repectively. The low mitigation scenario (SSP3-7.0) will lead to an increae of 3% in Euoprean O3 levels, while a 40% reduction is calculated for the Eueropean PM2.5 levels in 2050. Results also showed that O3 levels are expected to increase mainly over the southern Europe in all scenarios, while&#160;PM2.5 levels are expected to decrease in particular over central Europe.</p><p>&#160;</p>