1. National Field Science Observation and Research Station of Yulong Mountain Cryosphere and Sustainable Development , State Key Laboratory of Cryospheric Sciences, Northwest Institute of Eco-Environment and Resources, , Lanzhou 730000 , China
2. Chinese Academy of Sciences , State Key Laboratory of Cryospheric Sciences, Northwest Institute of Eco-Environment and Resources, , Lanzhou 730000 , China
3. Laboratory of Tree-Ring Research, University of Arizona , Tucson 85721 , USA
4. Northwest Institute of Plateau Biology, Chinese Academy of Sciences , Xining 810008 , China
5. School of Geography and Tourism, Shaanxi Normal University , Xi’an 710119 , China
6. School of Natural Resources and the Environment, University of Arizona , Tucson 85721 , USA
7. Dpto. de Sistemas y Recursos Naturales, Universidad Politécnica de Madrid , Madrid , Spain
8. Department of Geography, Swansea University , Singleton Park, Swansea SA28PP , UK
9. Instituto de Geología, Universidad Nacional Autónoma de México , México City 04510 , México