| 1 (12) | National Oceanic and Atmospheric Administration | USA |  |
| 2 (18) | National Aeronautics and Space Administration * | USA | |
| 3 (27) | Jet Propulsion Laboratory | USA | |
| 4 (136) | NASA Goddard Space Flight Center | USA | |
| 5 (142) | United States Geological Survey | USA | |
| 6 (206) | Sandia National Laboratories, New Mexico | USA | |
| 7 (234) | Smithsonian Institution * | USA | |
| 8 (293) | U.S. Army * | USA | |
| 9 (344) | US Environmental Protection Agency | USA | |
| 10 (368) | Smithsonian Environmental Research Center | USA | |
| 11 (386) | University of Maryland, Center for Environmental Science | USA | |
| 12 (490) | National Center for Atmospheric Research | USA | |
| 13 (537) | Smithsonian National Museum of Natural History | USA | |
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