1 / 15

Dynamic soil acidification modeling in Switzerland

Dynamic soil acidification modeling in Switzerland. Partners: Mattias Alveteg, Harald Sverdrup and Per Warfvinge from Lund University, Sweden; Rolf Becker and Hans-Dieter Nagel from Ökodata, Germany;

MartaAdara
Download Presentation

Dynamic soil acidification modeling in Switzerland

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Dynamic soil acidification modeling in Switzerland Partners: • Mattias Alveteg, Harald Sverdrup and Per Warfvinge from Lund University, Sweden; • Rolf Becker and Hans-Dieter Nagel from Ökodata, Germany; • Peter Brassel, Edgar Kaufmann, Peter Blaser and Stefan Zimmermann from the Swiss Federal Institute for Forest, Snow and Landscape Research (WSL); • Beat Rihm from Meteotest, Switzerland; • Sabine Braun from the Institute for Applied Plant Biology, Switzerland; The studies in Switzerland are coordinated and financed by the Swiss Agency for the Environment, Forests and Landscape (SAEFL) repre-sented by Beat Achermann and Richard Volz.

  2. Outline • Regional SAFE • National results • Scenario analysis results • Outlook In Switzerland, SAFE was applied • to the major rooting zone (the first 40 to 60 cm divided into 4 layers) • of 600 forest sites on intersections of a regular 4 x 4 km grid (National Forest Inventory), • using a simulation period of 250 years, • future acidifying deposition as to be expected from the implementation of the Gothenburg Protocol (GP99) • and future roundwood removal according to the European Timber Trend studies (ETTS_V).

  3. Regional SAFE - Step 1:Data acquisition

  4. Regional SAFE - Step 2:Data preparation

  5. Regional SAFE - Step 3:Soil chemistry modeling

  6. Data reduction • Removal of the depth-information by taking minimum, maximum or weighted parameter values (from 4 values to 1 value per site and year); • Removal of the spatial information by • calculating cumulative distribution functions and selected per-centile values for every year (from 600 values to e.g. 7 values per year). Plots of selected percentiles (5, 10, 25, 50, 75, 90 and 95) versus time; • comparing the parameter values with an agreed critical limit and calculating the percentage of sites violating this threshold (from 600 values to 1 value per year). Plots of the percentage of sites violating the threshold versus time.

  7. Trends of minimum molar Bc/Al and [ANC]National scale, 600 forest sites, GP99 and ETTS_V

  8. Trends of violation of parameter thresholdsNational scale, 600 forest sites, GP99 and ETTS_V

  9. Impact of emission reductions scenarios comparedNational scale, 600 forest sites, ETTS_V

  10. Impact of emission reductions scenarios comparedNational scale, 600 forest sites, ETTS_V

  11. Impact of forest management scenarios comparedRegional scale, 112 forest sites, GP99

  12. Impact of forest management scenarios comparedRegional scale, 112 forest sites, GP99

  13. Outlook - Lines of model development

  14. Outlook - Topics to be cleared • It is not clear yet, whether and how dynamic model results can be used in integrated assessment modeling and there is no agreement on deliverables yet; • Regarding the Convention, it looks like we still need both steady-state and dynamic modeling. Consequently, compatibility of steady-state and dynamic modeling (of acidification) regarding technicalities as well as input data becomes an issue; • With nitrogen becoming the dominant (acidifying and eutrophying) air pollutant, there is a need for better integration of nitrogen dynamics in dynamic models.

More Related