1. Joint Global Change Research Institute Pacific Northwest National Laboratory 5825 University Research Court College Park Maryland 20740 USA
2. Université de Lorraine UMR INRA‐UL 1137 Ecologie et Ecophysiologie Forestières Vandoeuvre‐les‐Nancy F54500 France
3. United States Geological Survey Menlo Park California 94025 USA
4. Department of Forest Ecosystems and Society Oregon State University Corvallis Oregon 97331 USA
5. Oak Ridge National Laboratory Climate Change Science Institute Oak Ridge Tennessee 37831 USA
6. United States Geological Survey Alaska Cooperative Fish and Wildlife Research Unit University of Alaska Fairbanks Fairbanks Alaska 99775 USA
7. Department of Plant and Soil Sciences University of Delaware Newark Delaware 19716 USA