Impact of HARMONIE high-resolution meteorological forecasts on the air quality simulations of LOTOS-EUROS

J. Ding, Ministry of Infrastructure and the Environment, Royal Netherlands Meteorological Institute
De Bilt : KNMI

In this study, we couple the LOTOS-EUROS model with high resolution meteorological forecasts from the Harmonie model to study the impact on air quality in comparison to simulations driven by ECMWF meteorological forecasts. The main purpose of this study is to compare the differences in meteorological variables between the ECMWF and Harmonie model, and analyse the impact of these differences on the air quality simulations of LOTOS-EUROS. A comparison of the meteorological variables shows that the capability of these two models to simulate the surface temperature, relative humidity and wind speed is similar. Because of the high resolution of Harmonie, there are clear differences in meteorological variables between ECMWF and Harmonie, especially at the coast, over forest and urban areas. We performed a comparison of model meteorological forecasts with observations in the Netherlands. Apart from the boundary layer height (BLH), it is hard to conclude which meteorological model gives better scores. The boundary layer height simulated by Harmonie is significantly lower than for the ECMWF model.

46 p.
Fig., tab.
(Trainee report = Stageverslag)
With ref.