1. NOAA Aeronomy Laboratory; Boulder Colorado USA
2. Cooperative Institute for Research in the Environmental Sciences; University of Colorado; Boulder Colorado USA
3. Institute for the Study of Earth, Oceans and Space, University of New Hampshire; Durham New Hampshire USA
4. Climate Change Research Center; University of New Hampshire; Durham New Hampshire USA
5. NOAA Pacific Marine Environmental Laboratory; Seattle Washington USA
6. Department of Chemistry and Biochemistry; University of Colorado; Boulder Colorado USA