Zheng Xiang, Nanjing University, Nanjing, China, Yongkang Xue, Univ California Los Angeles, Los Angeles, CA, United States, Weidong Guo, Nanjing University, School of Atmospheric Sciences,Joint International Research Laboratory of Atmospheric and Earth System Sciences, Nanjing, China, Melannie Diane Hartman, Colorado State University, Fort Collins, CO, United States, Ye Liu, University of California Los Angeles, Geography, Los Angeles, CA, United States, William J Parton, Colorado State University, Natural Resource Ecology Laboratory, Fort Collins, CO, United States and Peter Michael Cox, University of Exeter, College of Mathematics, Engineering, and Physical Sciences, Exeter, United Kingdom