Abstract

Ozone concentrations over Europe have been calculated with the EMEP MSC-W ozone model for two extended summer periods: April–September 1985 and April–October 1989. The predicted monthly variations in both mean and elevated ozone levels are illustrated. The model is shown to compare satisfactorily with ozone data across nearly all the months studied, particularly in 1989. Modelled PAN and total airborne nitrate concentrations are also shown to compare favourably with the measurements of a Nordic measurement campaign in autumn 1989, although there is an unresolved discrepancy between the modelled and observed NO2 at these sites. In addition, the model has now been used to estimate the effects of NOx and volatile organic compound emission control on both mean and elevated ozone levels for 6 months in 1989.

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