Ground-level ozone in four Chinese cities

L. K. Xue, T. Wang, J. Gao, A. J. Ding, X. H. Zhou, D. R. Blake, X. F. Wang, S. M. Saunders, S. J. Fan, H. C. Zuo, Q. Z. Zhang, and W. X. Wang Department of Civil and Environmental Engineering, Hong Kong Polytechnic University, Hong Kong, China Environment Research Institute, Shandong University, Ji’nan, Shandong, China Chinese Research Academy of Environmental Sciences, Beijing, China Institute for Climate and Global Change Research and School of Atmospheric Sciences, Nanjing University, Nanjing, Jiangsu, China Department of Chemistry, University of California at Irvine, Irvine, CA, USA School of Chemistry and Biochemistry, University of Western Australia, WA, Australia College of Environmental Science and Engineering, Sun Yat-Sen University, Guangzhou, Guangdong, China College of Atmospheric Sciences, Lanzhou University, Lanzhou, Gansu, China