1. Cooperative Institute for Research in Environmental Sciences (CIRES) University of Colorado Boulder CO USA
2. National Oceanic and Atmospheric Administration (NOAA) Chemical Sciences Laboratory (CSL) Boulder CO USA
3. National Center for Atmospheric Research (NCAR) Atmospheric Chemistry Observations and Modeling Laboratory (ACOM) Boulder CO USA
4. Now at Institute of Energy and Climate Research IEK‐8: Troposphere Forschungszentrum Jülich GmbH Jülich Germany
5. National Aeronautics and Space Administration Langley Research Center Hampton VA USA
6. Science Systems and Applications, Inc. Hampton VA USA
7. School of Earth and Atmospheric Sciences Georgia Institute of Technology Atlanta GA USA
8. National Center for Atmospheric Research (NCAR) Research Applications Laboratory (RAL) Boulder CO USA