Permissions

Scripps CO2 program grants unrestricted usage of the figures on this website provided credit is given to the Scripps Institution of Oceanography SIO. For figures showing data before 1958, permission may also be required from those providing these earlier data (see links below). The figures referred to here are the plots displayed on the front page and located at PDF Downloads.


Data sources

Data after 1958 are from the Scripps CO2 program

Site: http://scrippsco2.ucsd.edu/data/atmospheric_co2/primary_mlo_co2_record

DOI: http://doi.org/10.6075/J08W3BHW

Citation: C. D. Keeling, S. C. Piper, R. B. Bacastow, M. Wahlen, T. P. Whorf, M. Heimann, and H. A. Meijer, Exchanges of atmospheric CO2 and 13CO2 with the terrestrial biosphere and oceans from 1978 to 2000. I. Global aspects, SIO Reference Series, No. 01-06, Scripps Institution of Oceanography, San Diego, 88 pages, 2001. http://escholarship.org/uc/item/09v319r9

Data before 1958 going back 2000 years

Site: https://www.ncdc.noaa.gov/paleo-search/study/9959

DOI: https://doi.org/10.1029/2006GL026152

Citation: MacFarling Meure, C., D. Etheridge, C. Trudinger, P. Steele, R. Langenfelds, T. van Ommen, A. Smith, and J. Elkins. 2006. The Law Dome CO2, CH4 and N2O Ice Core Records Extended to 2000 years BP. Geophysical Research Letters, Vol. 33, No. 14, L14810 10.1029/2006GL026152.

Data before 1958 going back 800,000 years

Site: https://www.ncdc.noaa.gov/paleo-search/study/6091

DOI: https://doi.org/10.1038/nature06949

Citation: L├╝thi, D., M. Le Floch, B. Bereiter, T. Blunier, J.-M. Barnola, U. Siegenthaler, D. Raynaud, J. Jouzel, H. Fischer, K. Kawamura, and T.F. Stocker. 2008. High-resolution carbon dioxide concentration record 650,000-800,000 years before present. Nature, Vol. 453, pp. 379-382, 15 May 2008.