1. Department of Meteorology and Climate Science, San Jose State University, San Jose, CA, USA
2. Nelson Institute Center for Sustainability and the Global Environment (SAGE) and Department of Atmospheric and Oceanic Sciences, University of Wisconsin-Madison, Madison, WI, USA
3. United States Department of Agriculture Forest Service, Pacific Northwest Research Station, Seattle, WA, USA
4. NASA Marshall Space Flight Center, National Space Science and Technology Center, Universities Space Research Association, Huntsville, AL, USA
5. Department of Physics and Atmospheric Science, Dalhousie University, Halifax, Nova Scotia, Canada
6. Department of Energy, Environmental & Chemical Engineering, Washington University in Saint Louis, Saint Louis, MO, USA
7. Harvard-Smithsonian Center for Astrophysics, Smithsonian Astrophysical Observatory, Cambridge, MA, USA
8. Department of Earth and Environmental Sciences and Lamont-Doherty Earth Observatory, Columbia University, Palisades, NY, USA
9. Mechanical Engineering Department, University of Colorado, Boulder, CO, USA
10. Atmospheric Chemistry Observations and Modeling, National Center for Atmospheric Research, Boulder, CO, USA
11. Department of Environmental Health, Boston University School of Public Health, Boston, MA, USA
12. School of Environmental and Forest Sciences, University of Washington, Seattle, WA, USA
13. Office of Air Quality Planning & Standards, U.S. Environmental Protection Agency, Research Triangle Park, NC, USA
14. Asthma and Community Health Branch, Division of Environmental Health Science and Practice, National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, GA, USA