EMEP4PL and WRF-Chem—evaluation of the modelling results

Abstract

We used two different Eulerian atmospheric transport models—the Weather Research and Forecasting (WRF) coupled online with chemistry (WRF-Chem) and EMEP4PL coupled offline with meteorology from WRF-Chem. The models were run for Poland, which is characterized by a relatively poor air quality, especially during winter seasons. The simulations were run for 2 months—January and July 2015 and modelled concentrations of PM10, PM2.5, SO2 and NO2 were compared with measurements available at a one hour resolution. Both models give better results for the winter period than for summer. For July the WRF-Chem results for particulate matters are improved after inclusion of boundary conditions from the MOZART model. In general WRF-Chem gives higher FAC2 and lower NMB for both months in comparison to EMEP4PL. For EMEP4PL correlations with observations are higher in comparison to WRF-Chem.