1. Earth
System Research Laboratory, Chemical Sciences Division, National Oceanic and Atmospheric Administration, 325 Broadway, Boulder, Colorado, 80305 United States
2. Cooperative
Institute for Research in Environmental Sciences, University of Colorado, Boulder, Colorado, 80309 United States
3. Laboratory
of Photochemistry and Chemical Kinetics, Department of Chemistry, University of Crete, Vassilika Vouton, 71003 Heraklion, Crete, Greece
4. Earth
System Research Laboratory, Global Monitoring Division, National Oceanic and Atmospheric Administration, 325 Broadway, Boulder, Colorado, 80305 United States
5. NASA Goddard Space Flight Center, Greenbelt, Maryland, 20771 United States
6. Science Systems and Applications, Inc., Lanham, Maryland, 20706 United States