Valerie Trouet¹, Matthew Dobbyn Meko¹, Lara Klippel², Flurin Babst³, Jan Esper⁴, Paul Krusic⁵, Momchil Panayotov⁶ and Robert Wilson⁷, (1)University of Arizona, Laboratory of Tree-Ring Research, Tucson, AZ, United States, (2)Johannes Gutenberg University, Mainz, Germany, (3)WSL Swiss Federal Institute for Forest, Snow and Landscape Research, Birmensdorf, Switzerland, (4)Johannes Gutenberg University of Mainz, Department of Geography, Mainz, Germany, (5)Surrey, BC, Canada, (6)University of Forestry, Dendrology Dept., Sofia, Bulgaria, (7)University of St. Andrews, St Andrews, United Kingdom