1. Department of Mechanical Engineering, Colorado State University, Fort Collins, CO, USA
2. State Key Joint Laboratory of Environmental Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, China
3. State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex, Beijing, China
4. Ramboll, San Francisco, CA, USA
5. Department of Civil and Environmental Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA
6. Chemical Sciences Laboratory, National Oceanic and Atmospheric Administration, Boulder, CO, USA
7. Tofwerk, Boulder, CO, USA
8. Department of Chemistry, University of Colorado Boulder, Boulder, CO, USA
9. Cooperative Institute for Research in Environmental Sciences, Boulder, CO, USA
10. Department of Environmental Science, Policy, and Management, Berkeley, CA, USA
11. Department of Chemical Engineering, California Institute of Technology, Pasadena, CA, USA
12. Department of Civil and Environmental Engineering, University of California Davis, Davis, CA, USA
13. Department of Atmospheric Science, Colorado State University, Fort Collins, CO, USA