NOTICE (August 2016): CDIAC as currently configured and hosted by ORNL will cease operations on September 30, 2017. Data will continue to be available through this portal until that time. Data transition plans are being developed with DOE to ensure preservation and availability beyond 2017.

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data Data: Atmospheric Trace Gases in Whole-Air Samples

The following links are for methane, nonmethane hydrocarbons, alkyl nitrates, and chlorinated carbon compounds including three chlorofluorocarbons (CFC-11, CFC-12, and CFC-113)

data Worldwide Methane Concentrations

data Halogenated Organic Compounds

  • Carbon Tetrachloride
  • CFC-11
  • CFC-12
  • CFC-113
  • Chloroform
  • Halon 1211
  • Methyl Chloroform
  • Tetrachloroethene

data Alkyl Nitrates

  • Ethyl Nitrate
  • Methyl Nitrate
  • i-Propyl Nitrate

data Other non-methane hydrocarbons

  • Ethyne
  • Ethane
  • Propane
  • i-Butane
  • n-Butane