Data

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

• Mauna Loa CO₂ monthly mean data (text) or (CSV)
• Mauna Loa CO₂ annual mean data( text) or (CSV)
• Mauna Loa CO₂ annual mean growth rates (text) or (CSV)
• Mauna Loa CO₂ weekly mean and historical comparisons (text) or (CSV)
• Mauna Loa CO₂ daily means (text) or (CSV)

Additional CO₂ data from Mauna Loa and other worldwide sampling sites can be found using the GML Data Finder 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/GML (gml.noaa.gov/ccgg/trends/) and Dr. Ralph Keeling, Scripps Institution of Oceanography (scrippsco2.ucsd.edu/).

Contact

• Kirk Thoning, NOAA/GML, kirk.w.thoning@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.