Ahrends, Bernd

[["dc.bibliographiccitation.journal","Frontiers in Forests and Global Change"],["dc.bibliographiccitation.volume","3"],["dc.contributor.affiliation","Ahrends, Bernd; 1Department of Environmental Control, Northwest German Forest Research Institute (NW-FVA), Göttingen, Germany"],["dc.contributor.affiliation","Schmitz, Andreas; 2Thünen Institute of Forest Ecosystems, Eberswalde, Germany"],["dc.contributor.affiliation","Prescher, Anne-Katrin; 2Thünen Institute of Forest Ecosystems, Eberswalde, Germany"],["dc.contributor.affiliation","Wehberg, Jan; 5Institute of Geography, University of Hamburg, Hamburg, Germany"],["dc.contributor.affiliation","Geupel, Markus; 6German Environment Agency, Dessau-Roßlau, Germany"],["dc.contributor.affiliation","Andreae, Henning; 7Public Enterprise Sachsenforst, Pirna, Germany"],["dc.contributor.affiliation","Meesenburg, Henning; 1Department of Environmental Control, Northwest German Forest Research Institute (NW-FVA), Göttingen, Germany"],["dc.contributor.author","Ahrends, Bernd"],["dc.contributor.author","Schmitz, Andreas"],["dc.contributor.author","Prescher, Anne-Katrin"],["dc.contributor.author","Wehberg, Jan"],["dc.contributor.author","Geupel, Markus"],["dc.contributor.author","Andreae, Henning"],["dc.contributor.author","Meesenburg, Henning"],["dc.date.accessioned","2022-09-06T06:44:32Z"],["dc.date.available","2022-09-06T06:44:32Z"],["dc.date.issued","2020-09-16"],["dc.date.updated","2022-09-06T06:10:53Z"],["dc.description.abstract","A reliable quantification of total inorganic nitrogen (TIN) deposition to forests is required for the evaluation of ecological effects of TIN inputs to forests and to monitor the success of clean-air policy. As direct measurements are scarce, different modeling approaches have been developed to estimate TIN deposition to forests. Three common methods are the (i) “canopy budget model,” (ii) “inferential method,” and (iii) “emission based estimates” using a chemical transport model. Previous studies have reported considerable and site-specific differences between these methods, complicating the interpretation of results. We use data from more than 100 German intensive forest monitoring sites over a period of 16 years for a cross-comparison of these approaches. Non-linear mixed-effect models were applied to evaluate how factors like meteorology, terrain and stand characteristics affect discrepancies between the model approaches. Taking into account the uncertainties in deposition estimates, there is a good agreement between the canopy budget and the inferential method when using semi-empirical correction factors for deposition velocity. Wet deposition estimates of the emission based approach were in good agreement with wet-only corrected bulk open field deposition measurements used by the other two approaches. High precipitation amounts partly explained remaining differences in wet deposition. Larger discrepancies were observed when dry deposition estimates are compared between the emissions based approach and the other two approaches, which appear to be related to a combination of meteorological conditions and tree species effects."],["dc.identifier.doi","10.3389/ffgc.2020.00103"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/114150"],["dc.language.iso","en"],["dc.relation.eissn","2624-893X"],["dc.rights","CC BY 4.0"],["dc.rights.uri","http://creativecommons.org/licenses/by/4.0/"],["dc.title","Comparison of Methods for the Estimation of Total Inorganic Nitrogen Deposition to Forests in Germany"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.subtype","original_ja"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","219"],["dc.bibliographiccitation.issue","6"],["dc.bibliographiccitation.journal","Forests"],["dc.bibliographiccitation.volume","8"],["dc.contributor.author","Albert, Matthias"],["dc.contributor.author","Fleck, Stefan"],["dc.contributor.author","Ahrends, Bernd"],["dc.contributor.author","Sutmöller, Johannes"],["dc.contributor.author","Evers, Jan"],["dc.contributor.author","Meesenburg, Henning"],["dc.date.accessioned","2022-11-04T11:01:50Z"],["dc.date.available","2022-11-04T11:01:50Z"],["dc.date.issued","2017"],["dc.description.abstract","The North German Lowland is a region with locally high nitrate (NO3−) concentrations in seepage water, inducing an increased susceptibility to the effects of climate change. The future risk of rising NO3− concentrations in seepage water from forests was quantified for four regions in the North German Lowland using climate projections and a modelling system comprising submodels for forest stand development (WaldPlaner), water budgets (WaSiM-ETH), and biogeochemical element cycles (VSD+). The simulations for the period from 1990 to 2070 included three different forest management scenarios (reference, biodiversity, and climate protection) and showed a general decrease in groundwater recharge which could hardly be influenced by any of the management options. The simulated soil organic matter stocks adequately represented their past increase as expected from the National Forest Soil Inventory (NFSI), but also showed a future decline under climate change conditions which leads to higher organic matter decomposition and a long-lasting increase of NO3− leaching from forest soils. While the climate protection oriented scenario shows the highest increase in NO3− concentrations during the projection period until 2070, the biodiversity scenario kept NO3− concentrations in seepage water below the legal thresholds in three of four selected model regions."],["dc.identifier.doi","10.3390/f8060219"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/116947"],["dc.identifier.url","http://dx.doi.org/10.3390/f8060219"],["dc.language.iso","en"],["dc.relation.issn","1999-4907"],["dc.relation.orgunit","Nordwestdeutsche Forstliche Versuchsanstalt"],["dc.rights","CC BY 4.0"],["dc.title","Is Biomass Accumulation in Forests an Option to Prevent Climate Change Induced Increases in Nitrate Concentrations in the North German Lowland?"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]