Description: Das Projekt "Ozone Risk Assessment - O3FLUX" wird vom Umweltbundesamt gefördert und von Eidgenössische Forschungsanstalt für Wald, Schnee und Landschaft durchgeführt. Rationale: Within the frame work of the UNECE Convention on Long-Range Transboundary Air Pollution, the WSL investigates the assessment of ozone risk for forest ecoystems on the basis of ozone fluxes on a European-wide level. The scientific community agrees that from a plant physiological point of view a flux-based approach is superior over the currently applied concentration based (AOT) approach. However, for forest trees, the current state of knowledge allows a simplified and so far not-validated flux approach only. In order to improve the accuracy of the flux approach, it was suggested - to establish a European-wide network of sites where dose-response relationships can be studied to validate the suggested EMEP-photooxidant flux model, - to establish experimental free air fumigation systems to allow mechanistic studies excluding influencing factors as they may occur in chamber studies, - to consider further plant physiological plant response parameters - in addition to the so far applied growth parameter - for the investigation of dose-response relationships. Objectives: Based on the current discussions and the identified gaps of knowledge from the most recent workshops on the establishment of critical levels for ozone at Level II and the application and development of a flux-based concept to protect European forest ecosystems from tropospheric ozone, the WSL aims to contribute towards the development of a scientifically robust flux-based model parameterization to quantify the flux-response relationships under real field conditions. In particular, the WSL aims - to increase our understanding of the effective ozone flux, - to quantify the flux-response relationships for physiological response parameters and the development of ozone visible injury to determine the respective critical flux, - to foster the bio-indicator approach on the Swiss Level II plots, - to produce a tree species specific ozone risk map for Switzerland based on determined critical fluxes, - to take advantage of already existing data-bases for validation of the model parameterization for Norway spruce (Picea abies), - to provide new data for validation of the stomatal flux model for seedlings of main tree species, native to the central European regions, - to utilize field data available in the ICP-Forests data-base (assessment of ozone visible injury on the Swiss Level II plots since 1999), - to provide additional data for parameterization of the EMEP stomatal uptake model, with emphasize on the regional variation. Expected results: Our findings and results are expected to be used for the parameterization and validation of the EMEP-photooxidant flux model which is currently being refined within the framework of the UNECE Convention on Long-Range Transboundary Air Pollution, leading to a revised version of the Gothenborg Protocol to abate acidification, eutrophication and ground-level ozone.
Types:
SupportProgram
Origin: /Bund/UBA/UFORDAT
Tags: Gemeine Fichte ? Fichte ? Ozon ? Ozonwert ? Eutrophierung ? Waldbaum ? Norwegen ? Risikokarte ? Abfallbehandlung ? Baum ? Critical Level ? Raffination ? Skigebiet ? Blei ? Main ? Schweiz ? Dosis-Wirkungs-Beziehung ? Waldfläche ? Kartographie ? Waldökosystem ? Luft ? Sämling ? Bodennahes Ozon ? Genfer Luftreinhaltekonvention ? Bioindikator ? Daten ? Dosis ? Schnee ? Standortwahl ? Studie ? Troposphäre ? Kenngröße ? Workshop ? Begasung ? Datenbank ? Forschungseinrichtung ? Übereinkommen ? Risiko ? Gestein ? Gebiet ? Änderung ? Versauerung ? Staat ? Arbeit ? Risikobewertung ? Länder ? Bereich ? Konzentrat ? Lernziel ? Luftschadstoff, Transnationale Schadstoffausbreitung ? Wachstum [biologisch] ? frei ? Verwertung ? gebraucht ? neu ? regional ? Ratifikation ? spezifisch ? Schädigung ? bestehend ? Ableitung ? unter ? Erlass [Recht] ? Gemeinschaft ? verfügbar ? Ergebnis ? wissenschaftlich ? Sicht ? Untersuchung ? Verantwortung ? Art [Spezies] ? bewerten ? Verhältnis ? Vermehrung ? Annäherung ? angewandt ?
License: cc-by-nc-nd/4.0
Language: Deutsch
Time ranges: 2006-01-01 - 2008-12-31
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