1. Environment Research Institute, Shandong University, Jinan, Shandong 250100, China
2. State Key Laboratory of Coal Resources and Safe Mining, China University of Mining & Technology, Beijing 250100, China
3. School of Environment Science
and Engineering, Shandong University, Jinan,
Shandong 250100, China
4. Department
of Atmospheric Science, Colorado State University, Fort Collins, Colorado 80523, United States
5. Centre for Atmospheric Watch and
Services, Chinese Academy of Meteorological Sciences, China Meteorological Administration, Beijing, China
6. State Key of Laboratory of Atmospheric
Boundary Physics and Atmospheric Chemistry, Institute of Atmospheric
Physics, Chinese Academy of Sciences, Beijing
100029, China