1. Earth Systems Research Center, Institute for the Study of Earth, Oceans, and Space University of New Hampshire Durham New Hampshire USA
2. Now at NASA Postdoctoral Program, Chemistry and Dynamics Branch NASA Langley Research Center Hampton Virginia USA
3. Chemistry and Dynamics Branch, National Aeronautics and Space Administration Langley Research Center Hampton Virginia USA
4. Oak Ridge Associated Universities Oak Ridge, Tennessee USA
5. Science Systems and Applications Inc. Hampton Virginia USA
6. SPEC Inc. Boulder Colorado USA
7. National Center for Atmospheric Research Boulder Colorado USA
8. Department of Chemistry University of California Irvine California USA