Assessing critical load exceedances and ecosystem impacts of anthropogenic nitrogen and sulphur deposition at unmanaged forested catchments in Europe

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dc.contributor.author Forsius, Martin
dc.contributor.author Posch, Maximilian
dc.contributor.author Holmberg, Maria
dc.contributor.author Vuorenmaa, Jussi
dc.contributor.author Kleemola, Sirpa
dc.contributor.author Augustaitis, Algirdas
dc.contributor.author Beudert, Burkhard
dc.contributor.author Bochenek, Witold
dc.contributor.author Clarke, Nicholas
dc.contributor.author de Wit, Heleen A.
dc.contributor.author Dirnböck, Thomas
dc.contributor.author Frey, Jane
dc.contributor.author Grandin, Ulf
dc.contributor.author Hakola, Hannele
dc.contributor.author Kobler, Johannes
dc.contributor.author Krám, Pavel
dc.contributor.author Lindroos, Antti-Jussi
dc.contributor.author Löfgren, Stefan
dc.contributor.author Pecka, Tomasz
dc.contributor.author Rönnback, Pernilla
dc.contributor.author Skotak, Krzysztof
dc.contributor.author Szpikowski, Józef
dc.contributor.author Ukonmaanaho, Liisa
dc.contributor.author Valinia, Salar
dc.contributor.author Váňa, Milan
dc.date.accessioned 2021-09-20T10:33:49Z
dc.date.available 2021-09-20T10:33:49Z
dc.date.issued 2021
dc.identifier.citation Martin Forsius, Maximilian Posch, Maria Holmberg, Jussi Vuorenmaa, Sirpa Kleemola, Algirdas Augustaitis, Burkhard Beudert, Witold Bochenek, Nicholas Clarke, Heleen A. de Wit, Thomas Dirnböck, Jane Frey, Ulf Grandin, Hannele Hakola, Johannes Kobler, Pavel Krám, Antti-Jussi Lindroos, Stefan Löfgren, Tomasz Pecka, Pernilla Rönnback, Krzysztof Skotak, Józef Szpikowski, Liisa Ukonmaanaho, Salar Valinia, Milan Váňa. Assessing critical load exceedances and ecosystem impacts of anthropogenic nitrogen and sulphur deposition at unmanaged forested catchments in Europe. Science of The Total Environment 753 (2021), 141791, ISSN 0048-9697. https://doi.org/10.1016/j.scitotenv.2020.141791 fi
dc.identifier.issn 0048-9697
dc.identifier.uri http://hdl.handle.net/10138/334460
dc.description Highlights • Novel techniques for presenting exceedances of critical loads (CL) and their temporal development were developed. • Concentrations and fluxes of N and S compounds in deposition and runoff have decreased as a response to decreasing emissions. • Most sites with higher CL exceedances showed larger decreases in both inorganic N and H+ concentrations and fluxes in runoff. • Effects of the cumulative exceedance of the eutrophication CL were evaluated. • The results provide evidence on the link between CL exceedances and empirical impacts. fi
dc.description.abstract Anthropogenic emissions of nitrogen (N) and sulphur (S) compounds and their long-range transport have caused widespread negative impacts on different ecosystems. Critical loads (CLs) are deposition thresholds used to describe the sensitivity of ecosystems to atmospheric deposition. The CL methodology has been a key science-based tool for assessing the environmental consequences of air pollution. We computed CLs for eutrophication and acidification using a European long-term dataset of intensively studied forested ecosystem sites (n = 17) in northern and central Europe. The sites belong to the ICP IM and eLTER networks. The link between the site-specific calculations and time-series of CL exceedances and measured site data was evaluated using long-term measurements (1990–2017) for bulk deposition, throughfall and runoff water chemistry. Novel techniques for presenting exceedances of CLs and their temporal development were also developed. Concentrations and fluxes of sulphate, total inorganic nitrogen (TIN) and acidity in deposition substantially decreased at the sites. Decreases in S deposition resulted in statistically significant decreased concentrations and fluxes of sulphate in runoff and decreasing trends of TIN in runoff were more common than increasing trends. The temporal developments of the exceedance of the CLs indicated the more effective reductions of S deposition compared to N at the sites. There was a relation between calculated exceedance of the CLs and measured runoff water concentrations and fluxes, and most sites with higher CL exceedances showed larger decreases in both TIN and H+ concentrations and fluxes. Sites with higher cumulative exceedance of eutrophication CLs (averaged over 3 and 30 years) generally showed higher TIN concentrations in runoff. The results provided evidence on the link between CL exceedances and empirical impacts, increasing confidence in the methodology used for the European-scale CL calculations. The results also confirm that emission abatement actions are having their intended effects on CL exceedances and ecosystem impacts. fi
dc.language.iso en fi
dc.publisher Elsevier fi
dc.relation.ispartofseries Science of The Total Environment 753 (2021), 141791 fi
dc.rights CC BY-NC-ND 4.0
dc.subject air pollution fi
dc.subject environmental effects fi
dc.subject modelling fi
dc.subject biogeochemistry fi
dc.subject trends fi
dc.subject modelling (creation related to information) fi
dc.title Assessing critical load exceedances and ecosystem impacts of anthropogenic nitrogen and sulphur deposition at unmanaged forested catchments in Europe fi
dc.type Article fi
dc.identifier.laitoskoodi Suomen ympäristökoodi fi
dc.subject.ysa mallintaminen fi
dc.subject.ysa ympäristövaikutukset fi
dc.subject.ysa trendit fi
dc.subject.ysa päästöt fi
dc.subject.ysa ilman saastuminen fi
dc.subject.ysa typpi fi
dc.subject.ysa rikki fi
dc.subject.ysa biogeokemia fi
dc.subject.ysa laskeumat fi
dc.subject.ysa ilmansuojelu fi
dc.subject.ysa mallit (mallintaminen) fi
dc.identifier.doi https://doi.org/10.1016/j.scitotenv.2020.141791

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