activity : nca4-co2_10k-process



The colors of the CO2 dataset were changed from the original figure and combined to show a continuous data series. The year "2017" was added to show the current CO2 values.

The temperature dataset was added to this graph along with second y-axis, and is from the EPICA Dome C Ice Core 800KYr Deuterium Data and Temperature Estimates from the World Data Center for Paleoclimatology in Boulder, CO and NOAA paleoclimatology program ( These data were converted from degrees Celsius to degrees Fahrenheit. The year was multiplied by -1 to match the format of the CO2 calculations. The temperature dataset covers the same time period as the CO2 dataset and the historic data is largly from the same ice core.

Citation for the temperature dataset is: Jouzel, J et al. 2007. EPICA Dome C Ice Core 800KYr Deuterium Data and Temperature Estimates. IGBP PAGES/World Data Center for Paleoclimatology Data Contribution Series # 2007-091. NOAA/NCDC Paleoclimatology Program, Boulder CO, USA

Methodology Citation: EPA, 2017: Climate Change Indicators: Atmospheric Concentrations of Greenhouse Gases. U.S. Environmental Protection Agency (EPA), Washington, DC.

Data Bounding

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