1. Swiss Federal Research Institute WSL; Birmensdorf Switzerland
2. Department of Geography; Pennsylvania State University; University Park Pennsylvania USA
3. Paleoclimate Branch, National Climatic Data Center; National Oceanic and Atmospheric Administration; Boulder Colorado USA
4. Pacific Southwest Research Station, Forest Service; U.S. Department of Agriculture; Redding California USA
5. Department of Environmental Science, Policy, and Management; University of California; Berkeley California USA