AmeriFlux
- http://public.ornl.gov/ameriflux/
- Long-term measurements of carbon dioxide, water vapor, and energy exchange from different ecosystems, which are integrated into consistent, quality assured, and fully documented data sets.
Carbon Dioxide Information Analysis Center (CDIAC)
- http://cdiac.esd.ornl.gov/
- Global-change data and information analysis for the U.S. Department of Energy (DOE). Compiles and maintains international data sets on atmospheric chemistry, particularly atmospheric concentrations of carbon dioxide, methane and other radiatively active gases.
MOPITT AT NCAR
- http://www.eos.ucar.edu/mopitt/
- Provides measurements of the global distributions of carbon monoxide (CO) and methane (CH4) in the troposphere. This is satellite data.