- 1Research Institute for Nature and Forest (INBO), Brussel, Belgium (arne.verstraeten@inbo.be)
- 2State Agency for Nature, Environment and Consumer Protection of North Rhine-Westphalia, Germany
- 3National Research Council, Water Research Institute, Verbania Pallanza, Italy
- 4Norwegian Institute of Bioeconomy Research (NIBIO), Ås, Norway
- 5Swiss Federal Institute for Forest, Snow and Landscape Research (WSL), Birmensdorf, Switzerland
- 6Thünen Institute of Forest Ecosystems, Eberswalde, Germany
- 7Swedish Environmental Protection Agency, Stockholm, Sweden
- 8Croatian Forest Research Institute, Jastrebarsko, Croatia
- 9National Research and Development Institute in Forestry ”Marin Dracea”, Campulung Moldovenesc, Romania
- 10Earth Systems and Global Change Group, Wageningen University, The Netherlands
- 11Northwest German Forest Research Institute (NW-FVA), Göttingen, Germany
- 12Swedish Environmental Research Institute (IVL), Gothenburg, Sweden
The input of nitrogen (N) into forests through atmospheric deposition has been determined for the main forest types within the ICP Forests Level II monitoring network and the Swedish Throughfall Monitoring Network (SWETHRO) since the 1990s from measured concentrations in continuously collected precipitation (bulk deposition) and throughfall (below tree canopy) samples. Recently, aggregated data sets have been created, containing gap-filled monthly and annual bulk and throughfall depositions (including stemflow in beech stands) for more than 500 forest stands. Total deposition was calculated from throughfall deposition accounting for canopy exchange. Here, we present trends for throughfall deposition of inorganic N, including ammonium (NH4+-N) and nitrate (NO3--N), for plots with a complete time series, during the period 2000-2020 and in the first and last decade separately. Furthermore, we highlight and discuss spatial trends of total inorganic N deposition across Europe.
How to cite: Verstraeten, A., Schmitz, A., Marchetto, A., Clarke, N., Thimonier, A., Hilgers, C., Prescher, A.-K., Kirchner, T., Hansen, K., Jakovljević, T., Iacoban, C., de Vries, W., Ahrends, B., Meesenburg, H., Pihl Karlsson, G., Karlsson, P. E., and Waldner, P.: Trends of inorganic nitrogen deposition in European forests during the period 2000-2020, EGU General Assembly 2025, Vienna, Austria, 27 Apr–2 May 2025, EGU25-3079, https://doi.org/10.5194/egusphere-egu25-3079, 2025.
