1. Swiss Federal Research Institute for Forest, Snow and Landscape Research (WSL), 8903 Birmensdorf, Switzerland.
2. Oeschger Centre for Climate Change Research, University of Bern, 3012 Bern, Switzerland.
3. Institute for Forest Growth, University of Freiburg, 79085 Freiburg, Germany.
4. Institute of Geography, University of Innsbruck, 6020 Innsbruck, Austria.
5. Department of History, Harvard University, Cambridge, MA 02138, USA.
6. Laboratory of Tree-Ring Research, University of Arizona, Tucson, AZ 85721, USA.
7. Environmental Engineering Institute, École Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland.
8. Bavarian State Department for Cultural Heritage, 86672 Thierhaupten, Germany.
9. German Archaeological Institute, 14195 Berlin, Germany.
10. Department of Geography, Justus Liebig University, 35390 Giessen, Germany.
11. Department of Geography, Johannes Gutenberg University, 55128 Mainz, Germany.