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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Using Quick Data Search

The "Quick Data Search" will accept one or more words and will locate all CDIAC data sets related to those words. For multiple words, the search is conducted with an "and" logic. For example, searching on "airborne sunphotometer" (note with quotes) means that both of these words must be in the data set for it to be found. This feature allows you to prune search results by adding more words.

If you have multiple words and the search was not satisfactory, try the words one-at-a-time.

Please use our CDIAC metadata search engine ( for advanced searches (fielded, spatial and time period).