A tree-centered approach to assess impacts of extreme climatic events on forests - Sass-Klaassen, Ute (Wageningen University. Forest Ecology and Forest Management Group) ; Fonti, Patrick (Swiss Federal Institute for Forest. Snow and Landscape Research) ; Cherubini, Paolo (Swiss Federal Institute for Forest. Snow and Landscape Research) ; Gričar, Jožica (Gozdarsi Institut Slovenue. Department of Forest Yield and Silviculture) ; Robert, Elisabeth M. R. (Centre de Recerca Ecològica i d'Aplicacions Forestals) ; Steppe, Kathy (Ghent University (Gant, Bèlgica). Laboratory of Plant Ecology) ; Bräuning, Achim (Universitat d'Erlangen-Nuremberg. Department of Geography and Geosciences)