1. Shaanxi Key Laboratory of Disaster Monitoring and Mechanism Simulation, College of Geography and Environment, Baoji University of Arts and Sciences, Baoji 721013, China
2. State Key Laboratory of Loess and Quaternary Geology, Key Lab of Aerosol Chemistry and Physics, Institute of Earth Environment, Chinese Academy of Sciences, Xi’an 710061, China
3. Division of Atmospheric Sciences, Desert Research Institute, Reno, NV 89512, USA
4. Baoji Ecological Environment Science and Technology Service Center, Baoji 721000, China