Carbon Dioxide (CO₂)

Historical Records from Ice Cores

• Vostok, Antarctica (Barnola et al.)
• Siple Station, Antarctica (Neftel et al.)
• Law Dome, Antarctica (Etheridge et al.)

Continuous Measurements

• NOAA/CMDL Baseline Observatory Network (Thoning et al.)
• Scripps Institution of Oceanography Network (Keeling et al.)
• French Measurements at Amsterdam Island (Gaudry et al.)
• Hungarian Measurements at K-Puszta (Haszpra)
• Italian/Argentine Measurements at Jubany Station, Antarctica (Ciattaglia et al.)
• Italian Measurements at Mt. Cimone (Colombo and Santaguida)
• New Zealand Measurements at Baring Head (Manning et al.)

Flask Measurements

• NOAA/CMDL Cooperative Global Air Sampling Network (Conway et al.)
• Scripps Institution of Oceanography Network (Keeling et al.)
• CSIRO GASLAB Network (Steele et al.)
• Canadian Air Sampling Network (Worthy et al.)
• German UBA Air Sampling Network (Fricke et al.)
• German Fraunhofer Institute Air Sampling Network (Sladkovic et al.)
• Italian Measurements at Lampedusa Island (Chamard et al.)
• Measurements from Niwot Ridge, Colorado and Montana de Oro, California (Tyler)
• Former USSR Measurements from the Main Geophysical Observatory (Brounshtein et al.)

Aircraft Measurements

• CSIRO Aircraft Monitoring Program (Beardsmore and Pearman)