The complete Mauna Loa CO2 records described on this page are available.

Additional CO2 data from Mauna Loa and other worldwide sampling sites can be found using the ESRL/GMD Data Navigator of public data sets.

These values are subject to change depending on quality control checks of the measured data, but any revisions are expected to be small.

How to reference content from this page

Dr. Pieter Tans, NOAA/ESRL ( and Dr. Ralph Keeling, Scripps Institution of Oceanography (


  • Pieter Tans, NOAA/ESRL, ph. 303 497 6678,

Further Reading