• Cooperative Global Air Sampling Network - Greenhouse Gases (NOAA ESRL)
• In Situ Carbon Monoxide (CO) Measurements (NOAA ESRL)
• In Situ Carbon Dioxide (CO₂) Measurements (NOAA ESRL)
• In Situ Methane (CH₄) Measurements (NOAA ESRL)
• Atmospheric Research - Greenhouse Gases (CSIRO)
• Measurements of ¹⁴CO in the NH Tropics (NSF)
• Carbon Dioxide (CO₂) Measurements (Scripps)
• Oxygen (O₂) Concentration Measurements (Scripps)