Approaches to modelling local nitrogen deposition and concentrations in the context of Natura 2000: Background document
2011
Hertel, O. | Theobald, M. | Cellier, Pierre | Bleeker, A. | Bruce, D. | Frohn, L. M. | Hill, R. | Noordijk, E. | Sharp, M. | van Pul, A. | van Zanten, M.
Transport-chemistry models are useful and well-used tools in the environmental assessment of impacts of atmospheric N on Natura 2000 sites. Impacts arise from two groups of reactive nitrogen compounds: reduced nitrogen compounds (NH3 and its reaction product NH4+) and oxidised nitrogen compounds (NO, NO2 and their reaction products). Often the contributions from these two groups are of the same magnitude, but close to intensive livestock farms, the contribution from NH3 may dominate. Oxidised nitrogen compounds contribute to the long-range transport component of nitrogen deposition, but may for most practical purposes be disregarded in local scale assessments. Local scale assessments, therefore, concentrate on the assessment of NH3 deposition from local agricultural sources.
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