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Methane (CH₄)

Historical Records from Ice Cores

• Cores from Law Dome, Antarctica and Greenland (Etheridge et al.)

Continuous Measurements

• Advanced Global Atmospheric Gases Experiment (AGAGE, Prinn et al.)
• Cape Meares, Oregon (Khalil & Rasmussen)

Flask Measurements

• Methane, Nonmethane Hydrocarbons, Alkyl Nitrates, and Chlorinated Carbon Compounds including 3 Chlorofluorocarbons (CFC-11, CFC-12, and CFC-113) in Whole-air Samples (Blake)
• CSIRO GASLAB Network (Steele et al.)
  • GASLAB Flask Sampling Network Data (overview)
• Measurements from Niwot Ridge, Colorado and Montana de Oro, California (Tyler)
• Northern and Southern Hemisphere Sites (Quay & Stutsman)
• Northern & Southern Hemisphere Sites (Stevens)

Other Relevant Links

• NOAA/CMDL Cooperative Global Air Sampling Network (Dlugokencky et al.)