1. Key Laboratory of Aerosol, State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Science, Xi'an, China
2. Faculty of Environmental and Symbiotic Sciences, Prefectural University of Kumamoto, Kumamoto, Japan
3. Institute of Global Environmental Change, Xi'an Jiaotong University, Xi'an, China
4. Graduate School of Chinese Academy of Sciences, Beijing, China