Optimization of emission reductions to reduce atmospheric sulphur deposition in Europe: An examination of a methodology

Abstract

An examination has been made of the use of the LRT model of the Norwegian Meteorological Institute, which estimates the atmospheric exchanges of sulphur among 28 countries in Europe, to formulate optimized emission reduction scenarios. According to the methodology, emission reductions are needed in at least several countries to bring about a deposition reduction in a given country. However, it is most effective to reduce emissions in or near the country where deposition reductions are desired. To reduce deposition further, it is more effective to further reduce nearby emissions, rather than to seek additional emission reductions farther afield. Because of the complex distribution of strong source regions in Europe, an assessment of the advantages of an optimized emission reduction pattern over a uniform reduction scheme must await the better definition of deposition targets and the location where they are to be applied.