1. a International Institute for Earth System Science , Nanjing University , Nanjing 210093, China
2. b State Key Laboratory of Remote Sensing Science , jointly sponsored by the Institute of Remote Sensing Applications of Chinese Academy of Sciences and Beijing Normal University , Beijing 100101, China
3. d Department of Geography , University of Utah , Salt Lake City , Utah 84112–9155
4. c Poyang Lake Ecological Research Station for Environment and Health , Duchang 332600, China
5. e Department of Geosciences , University of Massachusetts , Amherst, Massachusetts 01003–9297
6. f Division of Ecosystem Science , University of California , Berkeley, California 94720‐3114