State Key Laboratory of Loess and Quaternary Geology;
Institute of Earth Environment;
Chinese Academy of Sciences;
Xi'an 710061;
China.;
Key Laboratory of Geographic Information Science of the Ministry of Education;
School of Geographic Sciences;
East China Normal University;
Shanghai 200041;
China;
Center of Excellence in Regional Atmospheric Environment;
Institute of Urban Environment;
Chinese Academy of Sciences;
Xiamen 361021;
China;
University of Chinese Academy of Sciences;
Beijin9 100049;
China;
State Key Laboratory of Environmental Criteria and Risk Assessment;
Chinese Research Academy of Environmental Sciences;
Beijing 100012;
China;