1. Climate, People, and Environment Program (CPEP), Institute for Environmental Studies, University of Wisconsin, 1
2. 25 West Dayton Street, Madison, WI 53706, USA,
3. Global Systems Group, Department of Plant Ecology, The Ecology Building, Lund University, S‐223 62 Lund, Sweden,
4. Earth System Science Center, Penn State University, University Park, PA 16802, USA,
5. Climate and Global Dynamics Division, National Center for Atmospheric Research (NCAR), PO Box 3000, Boulder, CO 80307, USA