NOTICE (September 2017): Data previously stored at the CDIAC archive are being transitioned to the new, ESS-DIVE archive. This website provides access to the CDIAC data during the transition. If you have any questions regarding the new archive or the data transition, please contact ess-dive-support@lbl.gov.

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graphics Graphics: 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)

Worldwide Methane Concentrations

Halogenated Organic Compounds

Alkyl Nitrates

Other non-methane hydrocarbons