Trends in CO₂, CH₄, N₂O, SF₆

Data

The complete globally averaged CO₂ records described on this page are available.

• Globally averaged marine surface monthly mean data (text) or (CSV)
• Globally averaged marine surface annual mean data (text) or (CSV)
• Globally averaged marine surface annual mean growth rates (text) or (CSV)
• Estimated Global Trend daily values (text) or (CSV)

See change log and notes

How to reference content from this page

• Lan, X., Tans, P. and K.W. Thoning: Trends in globally-averaged CO2 determined from NOAA Global Monitoring Laboratory measurements. Version 2025-05 https://doi.org/10.15138/9N0H-ZH07

Contact

• Xin Lan, NOAA/GML, xin.lan@noaa.gov

Further Reading

• A.P. Ballantyne, C.B. Alden, J.B. Miller, P.P. Tans, and J.W.C. White, (2012), Increase in observed net carbon dioxide uptake by land and oceans during the last 50 years, Nature 488, 70-72.
• T.J. Conway, P.P. Tans, L.S. Waterman, K.W. Thoning, D.R. Kitzis, K.A. Masarie, and N. Zhang, (1994), Evidence of interannual variability of the carbon cycle from the NOAA/CMDL global air sampling network, J. Geophys. Research, vol. 99, 22831-22855
• K.A. Masarie, P.P. Tans, (1995), Extension and integration of atmospheric carbon dioxide data into a globally consistent measurement record, J. Geopys. Research, vol. 100, 11593-11610