1. Key Laboratory of Tibetan Environmental Changes and Land Surface Processes, Institute of Tibetan Plateau Research, Chinese Academy of Sciences,Beijing,China
2. Laboratory for Remote Sensing and Geoinformatics, University of Texas at San Antonio,San Antonio, Texas,USA
3. State Key Laboratory Breeding Base of Nuclear Resources and Environment, East China Institute of Technology,Nanchang,China
4. State Key Laboratory of Grassland Agro-ecosystems, College of Pastoral Agriculture Science and Technology, Lanzhou University,Lanzhou,China