NOTICE (March 2018): This website provides access to the CDIAC archive data temporarily. It will be gradually transitioned into data packages in the new ESS-DIVE archive. This site will continue to operate in parallel during and after the transition, and will be retired at a future date. If you have any questions regarding the data or the transition, please contact

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Permission to Use Our Data

If you wish to use a diagram, image, graph, table, or other materials from the CDIAC website and are concerned with obtaining permission and possible copyright restrictions, there should be no concerns. All of the reports, graphics, data, and other information on the CDIAC website are freely and publicly available without copyright restrictions.

However as a professional courtesy, we ask that the original data source be acknowledged. Suggested citations appear at the bottom of the page for each data set. If the citation is unclear, simply contact CDIAC through our feedback form. Please identify the URL of the webpage in which the information or graphic appears.