Regional Modelling of Tropospheric Ozone

Atmospheric transport and chemistry models are an essential part of assessing ozone abatement. Such models allow a quantification of both the levels of ozone concentration across the whole of Europe, and of the relative effectiveness of different control measures. In this study, two photochemical models of the European Monitoring and Evaluation Programme (EMEPl) have been used to investigate the effects of emission control scenarios and to assess the contribution of specific source sectors to ozone formation over Europe. In a first step, the status quo of ozone concentrations was calculated for the base year 1990 and the trend scenario 2010, showing that even though precursor emissions were reduced significantly, ozone thresholds were exceeded to a large extent. Data from these models were also used as inputs for the emission-optimisation (Chap. 7), economic evaluation (Chap.s 9 & 10), and for more local modelling (Chap. 8). An important application of the Lagrangian model was the provision of sourcereceptor-matrices for the optimisation by the means of calculating matrices to relate emissions to ozone formation for a 5-year average (see Sect. 6.5).