1. Department of Chemistry and Biochemistry; University of California, San Diego; La Jolla California USA
2. South China Institute of Environmental Sciences; Ministry of Environmental Protection; Guangzhou China
3. Environmental Science Programs, School of Science; Hong Kong University of Science and Technology; Hong Kong Hong Kong
4. Key Laboratory of Tibetan Environment Changes and Land Surface Processes, Institute of Tibetan Plateau Research; Chinese Academy of Sciences; Beijing China
5. CAS Center for Excellence in Tibetan Plateau Earth Sciences; Beijing China
6. State Key Laboratory of Cryospheric Sciences, Cold and Arid Regions Environmental and Engineering Research Institute; CAS; Lanzhou China
7. Institute of Earth Environment; CAS; Xi'an China