1. a College of Environment and Natural Resources, Zhejiang University , Hangzhou, 310029, China
2. b Department of Geography , University of Missouri , Columbia, MO, 65211, USA
3. c Center for Global Change and Earth Observations and Department of Geography , Michigan State University , East Lansing, MI, 48824, USA
4. d Applied GeoSolutions, LLC , Durham, NH, 03824, USA