1. Center for Atmospheric Particle Studies, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
2. Department of Mechanical Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
3. Penn State Greater Allegheny, 4000 University Drive, McKeesport, Pennsylvania 15132, United States
4. Department of Civil and Environmental Engineering, National University of Singapore, Singapore 117576
5. Department of Civil, Architectural and Environmental Engineering, University of Texas, Austin, Texas 78712, United States