| 1 (6) | National Oceanic and Atmospheric Administration | USA |  |
| 2 (18) | National Aeronautics and Space Administration * | USA | |
| 3 (35) | United States Geological Survey | USA | |
| 4 (48) | Jet Propulsion Laboratory | USA | |
| 5 (65) | NASA Goddard Space Flight Center | USA | |
| 6 (92) | Smithsonian Institution * | USA | |
| 7 (121) | National Center for Atmospheric Research | USA | |
| 8 (194) | Environment Canada | CAN | |
| 9 (205) | University of Maryland, Center for Environmental Science | USA | |
| 10 (240) | US Environmental Protection Agency | USA | |
| 11 (253) | US Naval Research Laboratory | USA | |
| 12 (258) | Smithsonian Environmental Research Center | USA | |
| 13 (312) | Bedford Institute of Oceanography | CAN | |
| 14 (359) | Smithsonian National Museum of Natural History | USA | |
| 15 (439) | Natural Resources Canada | CAN | |
| 16 (476) | Pacific Northwest National Laboratory | USA | |
| 17 (551) | U.S. Army * | USA | |
| 18 (724) | American Museum of Natural History | USA | |
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