NOTICE: 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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Trace Gas Emissions

Carbon Dioxide

Fossil-Fuel CO2 Emissions

Land-Use CO2 Emissions

Soil CO2 Emissions



Computer Model

  • The IEA/ORAU Long-Term Global Energy- CO2 Model: Personal Computer Version A84PC (1995), CMP-002/PC | Abstract | PDF