1. WSL Swiss Federal Institute for Forest, Snow and Landscape Research Birmensdorf Switzerland
2. Department of Geography University of Zurich Zürich Switzerland
3. Laboratory of Ion Beam Physics ETH Zürich Zürich Switzerland
4. PSI Paul Scherrer Institute Villigen Switzerland
5. Department of Earth Systems Science ETH Zürich Zürich Switzerland
6. Lamont‐Doherty Earth Observatory Columbia University Palisades New York USA
7. Department of Forest and Nature Conservation, Faculty of Forestry University of British Columbia Vancouver British Columbia Canada