Impacts of climate and emission changes on nitrogen deposition in Europe: a multi-model study
Item
Title (Dublin Core)
Impacts of climate and emission changes on nitrogen deposition in Europe: a multi-model study
Description (Dublin Core)
The impact of climate and emissions changes on the deposition of reactive nitrogen (Nr) over Europe was studied using four offline regional chemistry transport models (CTMs) driven by the same global projection of future climate over the period 2000–2050. Anthropogenic emissions for the years 2005 and 2050 were used for simulations of both present and future periods in order to isolate the impact of climate change, hemispheric boundary conditions and emissions, and to assess the robustness of the results across the different models. <br><br> The results from these four CTMs clearly show that the main driver of future N-deposition changes is the specified emission change. Under the specified emission scenario for 2050, emissions of oxidised nitrogen were reduced substantially, whereas emissions of NH<sub>3</sub> increase to some extent, and these changes are largely reflected in the modelled concentrations and depositions. The lack of sulfur and oxidised nitrogen in the future atmosphere results in a much larger fraction of NH<sub>x</sub> being present in the form of gaseous ammonia. <br><br> Predictions for wet and total deposition were broadly consistent, although the three fine-scale models resolve European emission areas and changes better than the hemispheric-scale model. The biggest difference in the models is for predictions of individual N compounds. One model (EMEP) was used to explore changes in critical loads, also in conjunction with speculative climate-induced increases in NH<sub>3</sub> emissions. These calculations suggest that the area of ecosystems that exceeds critical loads is reduced from 64% for year 2005 emissions levels to 50% for currently estimated 2050 levels. A possible climate-induced increase in NH<sub>3</sub> emissions could worsen the situation, with areas exceeded increasing again to 57% (for a 30% NH<sub>3</sub> emission increase).
Creator (Dublin Core)
Simpson, D.
Andersson, C.
Christensen, J.H.
Engardt, M.
Geels, C.
Nyiri, A.
Posch, M.
Soares, J.
Sofiev, M.
Wind, P.
Langner, J.
Date (Dublin Core)
2018-09-11
Type (Dublin Core)
info:eu-repo/semantics/Text
Format (Dublin Core)
info:eu-repo/semantics/application/pdf
Identifier (Dublin Core)
10.5194/acp-14-6995-2014
https://acp.copernicus.org/articles/14/6995/2014/
Source (Dublin Core)
eISSN: 1680-7324
Language (Dublin Core)
eng
Relation (Dublin Core)
info:eu-repo/grantAgreement/EC/FP7/282910
info:eu-repo/grantAgreement/EC/FP7/265148
info:eu-repo/grantAgreement/EC/FP7/243406
info:eu-repo/grantAgreement/EC/FP7/212520
Rights (Dublin Core)
info:eu-repo/semantics/openAccess
