1. a Key Laboratory for Silviculture and Conservation, Ministry of Education, College of Forestry , Beijing Forestry University , 100083, Beijing, People's Republic of 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 , 100101, Beijing, People's Republic of China
3. c Department of Earth and Atmospheric Sciences , Purdue University , West Lafayette, IN, 47907, USA
4. d Goddard Space Flight Center, National Aeronautics and Space Administration (NASA) , Greenbelt, Maryland, 20771, USA