1. Department of Earth, Atmospheric, and Planetary Sciences; Massachusetts Institute of Technology; Cambridge Massachusetts USA
2. Program for Climate Model Diagnosis and Intercomparison; Lawrence Livermore National Laboratory; Livermore California USA
3. Department of Atmospheric Sciences; University of Washington; Seattle Washington USA
4. NOAA Geophysical Fluid Dynamics Laboratory; Princeton Forrestal Campus; Princeton New Jersey USA
5. Atmospheric Chemistry Observations and Modeling Laboratory; National Center for Atmospheric Research; Boulder Colorado USA