*Jiquan Chen¹、Zutao Ouyang¹、Changliang Shao²、Ranjeet John¹、Geoffrey M Henebry¹、Pavel Groisman³ (1.Center for Global Changes and Earth Observation, Department of Geography, Environment, and Spatial Sciences, Michigan State University、2.Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences、3.NC State University Research Scholar, NOAA National Centers for Environment Information)