Data

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

• Mauna Loa CO₂ monthly mean data
• Mauna Loa CO₂ annual mean data
• Mauna Loa CO₂ annual mean growth rates
• Mauna Loa CO₂ weekly mean and historical comparisons

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.

• See change log and notes
• A description of how we make measurements at Mauna Loa.

How to reference content from this page

Dr. Pieter Tans, NOAA/ESRL (www.esrl.noaa.gov/gmd/ccgg/trends/) and Dr. Ralph Keeling, Scripps Institution of Oceanography (scrippsco2.ucsd.edu/).

Contact

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

Further Reading

• C.D. Keeling, R.B. Bacastow, A.E. Bainbridge, C.A. Ekdahl, P.R. Guenther, and L.S. Waterman, (1976), Atmospheric carbon dioxide variations at Mauna Loa Observatory, Hawaii, Tellus, vol. 28, 538-551
• K.W. Thoning, P.P. Tans, and W.D. Komhyr, (1989), Atmospheric carbon dioxide at Mauna Loa Observatory 2. Analysis of the NOAA GMCC data, 1974-1985, J. Geophys. Research, vol. 94, 8549-8565
• Etheridge, D. M., L. P. Steele, R. L. Langenfelds, R. J. Francey, J.-M. Barnola, and V. I. Morgan, (1996), Natural and anthropogenic changes in atmospheric CO2 over the last 1000 years from air in Antarctic ice and firn, J. Geophys. Res., 101(D2), 4115–4128, doi:10.1029/95JD03410.