1. Research Applications Laboratory, National Center for Atmospheric Research, Boulder, Colorado
2. Atmospheric Chemistry Observations and Modeling, and Modeling and Mesoscale and Microscale Meteorology, National Center for Atmospheric Research, Boulder, Colorado
3. Air Resources Division, National Park Service, Denver, Colorado
4. Department of Chemistry, Colorado State University, Fort Collins, Colorado
5. Department of Atmospheric Science, Colorado State University, Fort Collins, Colorado
6. Climate and Global Dynamics Laboratory, National Center for Atmospheric Research, Boulder, Colorado
7. U.K. Centre for Ecology and Hydrology, Penicuik, Midlothian, and School of Chemistry, University of Edinburgh, Edinburgh, United Kingdom
8. Atmospheric Chemistry Observations and Modeling, National Center for Atmospheric Research, Boulder, Colorado
9. Biospheric Sciences Laboratory, NASA Goddard Space Flight Center, Greenbelt, Maryland
10. Department of Climate and Space Sciences and Engineering, University of Michigan, Ann Arbor, Michigan