Abstract
The Fine Resolution Atmospheric Multi-pollutant Exchange model (FRAME) was applied to model the spatial distribution of air concentration and deposition of nitrogen (N) compounds between 1990 and 2005. Modelled wet deposition of N was found to decrease more slowly than the emissions reductions rate. This is attributed to a number of factors including increases in NOxemissions from international shipping and changing rates of atmospheric oxidation. The modelled deposition of NOyand NHxto the United Kingdom (UK) was estimated to fall by 52â% and 25â % between 1970 and 2020. The percentage of the UK surface area for which critical loads for sensitive ecosystems are exceeded was estimated to fall from 73â 49â % for nutrient N deposition. Comparison with model simulations at 1 km and 5 km resolution demonstrated that fine scale simulations are important in order to spatially separate agricultural source regions from sink areas (nature reserves) for ammonia dry deposition.
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Dore, A. J., Werner, M., Hall, J. R., Dore, C. J., Hallsworth, S., Kryza, M., … Sutton, M. A. (2014). Regional scale modelling of the concentration and deposition of oxidised and reduced nitrogen in the UK. In Nitrogen Deposition, Critical Loads and Biodiversity: Proceedings of the International Nitrogen Initiative Workshop, Linking Experts of the Convention on Long-Range Transboundary Air Pollution and the Convention on Biological Diversity (pp. 39–47). Springer Netherlands. https://doi.org/10.1007/978-94-007-7939-6_5
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