1. State Environmental Protection Key Laboratory of Urban Ambient Air Particulate Matter Pollution Prevention and Control, College of Environmental Science and Engineering Nankai University Tianjin P.R. China
2. Tianjin Eco‐Environmental Monitoring Center Tianjin P.R. China
3. Department of Civil, Environmental and Construction Engineering University of Central Florida Orlando FL USA
4. School of Engineering and Applied Sciences Harvard University Cambridge MA USA
5. School of Civil and Environmental Engineering Georgia Institute of Technology Atlanta GA USA