1. Key Laboratory of Semi-Arid Climate Change, Ministry of Education, College of Atmospheric Sciences, Lanzhou University, China
2. Lanzhou Central Meteorological Observatory, China
3. College of Global Change and Earth System Science (GCESS), Beijing Normal University, China
4. Joint Center for Global Change Studies, China
5. College of Atmospheric Sciences, Lanzhou University, China
6. Department of Atmospheric Sciences, University of Utah, UT, USA