1. NASA Langley Research Center Hampton VA USA
2. Science Systems and Applications, Inc. Hampton VA USA
3. Universities Space Research Association Columbia MD USA
4. Now at: US EPA Research Triangle Park Durham NC USA
5. The Pennsylvania State University University Park PA USA
6. Now at: Atmospheric Sciences and Global Change Division Pacific Northwest National Laboratory Richland WA USA
7. Now at: LSCE/IPSL Gif sur Yvette France
8. Department of Geosciences, Atmospheric Science Division Texas Tech University Lubbock TX USA
9. Cooperative Institute for Research in Environmental Sciences University of Colorado‐Boulder Boulder CO USA
10. NOAA Global Monitoring Laboratory Boulder CO USA