Department of Chemistry and Biochemistry and CIRES, University of Colorado, UCB 216, Boulder, CO 80309-0216, USA
NASA Postdoctoral Program Fellow, University of Colorado Center for Astrobiology, UCB 392, Boulder, CO 80309-0392, USA
Laboratory for Atmospheric and Space Physics and Department of Atmospheric and Oceanic Sciences, University of Colorado, UCB 392, Boulder, CO 80309, USA