1. Department of Natural Resources and Environmental Sciences, University of Illinois at Urbana−Champaign, Urbana, Illinois 61801, United States
2. College of Environmental & Resource Sciences, Zhejiang University, Hangzhou 310058, People’s Republic of China
3. Department of Soil, Water, and Climate, University of Minnesota─Twin Cities, St. Paul, Minnesota 55108, United States
4. Department of Plant Biology, University of Illinois at Urbana−Champaign, Urbana, Illinois 61801, United States
5. Department of Earth Science and Environmental Change, University of Illinois at Urbana−Champaign, Urbana, Illinois 61801, United States
6. Laboratory for Air Pollution & Environmental Technology, Empa, Dübendorf CH-8600, Switzerland
7. Agricultural Research Service, United States Department of Agriculture, St. Paul, Minnesota 55108, United States
8. School of Geographical Sciences, Key Laboratory of Geographic Information Science (Ministry of Education), East China Normal University, Shanghai 200241, People’s Republic of China