• Atmospheric Radiation Measurement (ARM) Program
• Atmospheric Science
• Carbon Dioxide Information Analysis Center
• Atmospheric Radiation Measurement -- Unmanned Aerospace Vehicle (ARM-UAV) program

National Aeronautics & Space Administration, Earth Science Enterprise:  Atmospheric Chemistry

National Science Foundation, Global Change Research Program

• GEODATA
• Global Tropospheric Chemistry Program
• Greenhouse Gas Dynamics
• Joint Global Ocean Flux Study (JGOFS). See also International JGOFS and US JGOFS sites.
• Polar Ozone Depletion/UV Radiation Effects

Smithsonian Institution

• Smithsonian Astrophysical Observatory, Down to Earth applications. "Using remote sensing techniques developed for astronomy, SAO scientists have improved understanding of global change by carrying out observations of the Earth's atmosphere. Instruments carried on high-altitude balloons and satellites in international collaborations, with supporting theoretical analyses and laboratory measurements, have catalogued the molecular constituents of the upper atmosphere and their interactions."

Other: