1. Key Laboratory of Semi-Arid Climate Change and College of Atmospheric Sciences; Lanzhou University; Lanzhou China
2. Department of Atmospheric Sciences; University of Utah; Salt Lake City Utah USA
3. National Climate Center; Beijing China
4. Inner Mongolia Autonomous Region Meteorological Observatory; Hohhot China
5. State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics; Beijing China