1. State Key Laboratory of Remote Sensing Science, Research Center for Remote Sensing and GIS and School of Geography Beijing Normal University Beijing China
2. Department of Civil and Environmental Engineering and Water Resource Research Center University of Hawaii at Manoa Honolulu Hawaii USA
3. State Key Laboratory of Remote Sensing Science and College of Global Change and Earth System Science Beijing Normal University Beijing China
4. Department of Geographical Sciences University of Maryland College Park Maryland USA
5. Department of Civil and Environmental Engineering Massachusetts Institute of Technology Cambridge Massachusetts USA
6. National Hulunber Grassland Ecosystem Observation and Research Station, Institute of Agricultural Resources and Regional Planning Chinese Academy of Agricultural Sciences Beijing China