| 1 (2) | United States Department of Agriculture | USA |  |
| 2 (4) | National Aeronautics and Space Administration * | USA | |
| 3 (6) | Boston University * | USA |  |
| 4 (11) | Harvard University * | USA | |
| 5 (15) | Stanford University * | USA | |
| 6 (22) | Texas Tech University | USA | |
| 7 (24) | Pennsylvania State University * | USA | |
| 8 (25) | NASA Goddard Space Flight Center | USA | |
| 9 (26) | United States Geological Survey | USA | |
| 10 (27) | Cornell University * | USA | |
| 11 (32) | South Dakota State University | USA | |
| 12 (33) | Yale University * | USA | |
| 13 (34) | Johns Hopkins University * | USA | |
| 14 (37) | Ohio State University, Columbus * | USA | |
| 15 (38) | California Institute of Technology * | USA | |
| 16 (39) | Jet Propulsion Laboratory | USA | |
| 17 (47) | Massachusetts Institute of Technology * | USA | |
| 18 (54) | University of California, Davis * | USA | |
| 19 (55) | University of Illinois at Urbana-Champaign * | USA | |
| 20 (56) | University of Maryland, College Park * | USA | |
| 21 (57) | University of Florida * | USA | |
| 22 (58) | Louisiana State University, Baton Rouge | USA | |
| 23 (59) | University of Kentucky * | USA | |
| 23 (59) | Michigan State University | USA | |
| 25 (60) | University of Wisconsin, Madison * | USA | |
| 26 (63) | Colorado State University, Fort Collins * | USA | |
| 27 (65) | University of Nebraska, Lincoln | USA | |
| 28 (69) | Iowa State University | USA | |
| 29 (76) | University of Maryland, Baltimore | USA | |
| 30 (77) | Virginia Polytechnic Institute and State University | USA | |
| 31 (80) | National Oceanic and Atmospheric Administration | USA | |
| 32 (81) | University of California, Berkeley * | USA | |
| 33 (82) | US Environmental Protection Agency | USA | |
| 34 (83) | University of Colorado, Boulder * | USA | |
| 35 (87) | University of South Florida System * | USA | |
| 36 (91) | University of Arizona * | USA | |
| 37 (94) | Arizona State University | USA | |
| 38 (96) | Oregon State University | USA | |
| 39 (104) | Kansas State University | USA | |
| 40 (107) | Texas A&M University, College Station * | USA | |
| 41 (111) | University of Texas, Austin | USA | |
| 42 (113) | Lawrence Berkeley National Laboratory * | USA | |
| 43 (118) | Northern Arizona University | USA | |
| 43 (118) | University of Connecticut, Storrs * | USA | |
| 45 (120) | Columbia University * | USA | |
| 46 (121) | University of California, Los Angeles * | USA | |
| 47 (122) | University of Maine, Orono | USA | |
| 48 (127) | University of Idaho | USA | |
| 49 (129) | University of Washington * | USA | |
| 50 (132) | University of Oklahoma * | USA | |
| 51 (136) | University of California, Santa Barbara | USA | |
| 52 (138) | University of California, Irvine * | USA | |
| 53 (142) | Purdue University | USA | |
| 54 (145) | University of California, Riverside | USA | |
| 54 (145) | University of Minnesota, Twin Cities * | USA | |
| 56 (146) | Princeton University | USA | |
| 57 (153) | Washington State University, Pullman * | USA | |
| 58 (155) | University of Michigan, Ann Arbor * | USA | |
| 59 (168) | Rutgers, The State University of New Jersey | USA | |
| 60 (191) | University of New Hampshire | USA | |
| 61 (192) | North Carolina State University | USA | |
| 62 (196) | University of Georgia | USA | |
| 63 (204) | Duke University * | USA | |
| 64 (212) | Oak Ridge National Laboratory | USA | |
| 65 (216) | University of California, San Diego * | USA | |
| 66 (230) | Utah State University * | USA | |
| 67 (231) | University of Virginia * | USA | |
| 68 (239) | University of Missouri, Columbia * | USA | |
| 69 (241) | Auburn University | USA | |
| 70 (244) | University of Delaware | USA | |
| 71 (248) | University of Massachusetts, Amherst | USA | |
| 72 (261) | University of Hawaii, Manoa * | USA | |
| 73 (272) | University of Montana, Missoula | USA | |
| 74 (281) | University of California, Santa Cruz | USA | |
| 75 (289) | University of Wyoming | USA | |
| 76 (298) | University of Tennessee, Knoxville * | USA | |
| 77 (308) | University of Arkansas, Fayetteville | USA | |
| 78 (310) | Pacific Northwest National Laboratory | USA | |
| 79 (329) | Mississippi State University | USA | |
| 80 (342) | Clemson University | USA | |
| 81 (346) | Montana State University, Bozeman | USA | |
| 82 (354) | University of Kansas * | USA | |
| 83 (362) | Florida International University | USA | |
| 84 (367) | University of Nevada-Reno | USA | |
| 85 (386) | New Mexico State University | USA | |
| 86 (388) | Oklahoma State University, Stillwater | USA | |
| 87 (390) | West Virginia University * | USA | |
| 88 (403) | North Dakota State University | USA | |
| 89 (447) | Colorado School of Mines | USA | |
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