1. Paul Scherrer Institut; Villigen Switzerland
2. University of Bern; Bern Switzerland
3. Oeschger Centre for Climate Change Research; University of Bern; Bern Switzerland
4. Swiss Federal Research Institute WSL; Birmensdorf Switzerland
5. Department of Geography; Swansea University; Swansea UK
6. Laboratoire des Sciences du Climat et de L'Environment; Gif-sur Yvette France
7. Tree-Ring Laboratory; Lamont-Doherty Earth Observatory of Columbia University; Palisades NY 10964 USA
8. Department of Catchment Hydrology; Helmholtz Centre for Environmental Research-UFZ; Halle Germany
9. Dept d'Ecologia; Facultat de Biologia; Universitat de Barcelona; Barcelona Spain
10. Chair of Ecoclimatology; Technische Universität München; Freising Germany
11. School of Geography, Earth & Environmental Sciences; University of Birmingham; Birmingham B15 2TT UK
12. Institute of Botany; Hohenheim University; Stuttgart Germany
13. Laboratory of Chronology; Finnish Museum of Natural History; University of Helsinki; P.O. Box 64 Helsinki 00014 Finland
14. Finnish Environment Institute; P.O. Box 140 Helsinki 00251 Finland
15. Climate Dynamics and Landscape Evolution; GFZ German Centre for GeoSciences; Potsdam 14473 Germany
16. Bolin Centre for Climate Research; Department of Physical Geography and Quaternary Geology; Stockholm University; Stockholm Sweden
17. Northern Regional Unit; Finnish Forest Research Institute; Rovaniemi Finland
18. Department of Yield and Silviculture; Slovenian Forestry Institute; Večna pot 2 Ljubljana 1000 Slovenia
19. University of Gothenburg; Gothenburg Sweden
20. Department of Life Sciences; Anglia Ruskin University; East Road Cambridge CB1 1PT UK
21. Department of Geography; College of Life and Environmental Sciences; University of Exeter, Rennes Drive; Exeter EX4 4RJ UK
22. Lancaster Environment Centre; University of Lancaster; LA1 4YQ UK