1. Divisions of Geological and Planetary Sciences and Engineering and Applied Science; California Institute of Technology; Pasadena; California; USA
2. NASA Goddard Space Flight Center; Laboratory for Atmospheric Physics; Greenbelt; Maryland; USA
3. U.S. Department of Agriculture Forest Service; Newtown Square; Pennsylvania; USA
4. U.S. Department of Agriculture Forest Service; Burlington; Vermont; USA
5. Carnegie Institution of Washington; Stanford; California; USA