1. Climate and Space Sciences and Engineering; University of Michigan; Ann Arbor Michigan USA
2. National Center for Atmospheric Research; Boulder Colorado USA
3. NASA Langley Research Center; Hampton Virginia USA
4. Chemical Sciences Division; NOAA Earth System Research Laboratory; Boulder Colorado USA
5. Cooperative Institute for Research in Environmental Sciences; University of Colorado Boulder; Boulder Colorado USA
6. Institute of Ion Physics and Applied Physics; University of Innsbruck; Innsbruck Austria
7. Department of Chemistry; University of Oslo; Oslo Norway
8. Oak Ridge Associated Universities (ORAU); Oak Ridge Tennessee USA
9. Institute of Arctic and Alpine Research; University of Colorado Boulder; Boulder Colorado USA
10. Department of Earth Sciences; Millersville University of Pennsylvania; Millersville Pennsylvania USA