1. State Key Laboratory of Frozen Soils Engineering, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, China
2. Northeast-China Observatory and Research-Station of Permafrost Geo-Environment (Ministry of Education), Institute of Cold-Regions Science and Engineering, and School of Civil Engineering, Northeast China Forest University, Harbin, China
3. Institute of Earth Sciences, Vrije Universiteit Amsterdam, Netherlands
4. Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining, China