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Figure : figure-17-2--geological-context-of-carbon-dioxide--co2--
Geological Context of Carbon Dioxide (CO2)
This figure appears in chapter 17 of the Second State of the Carbon Cycle Report (SOCCR2): A Sustained Assessment Report report.
(a) Paleoreconstruction of atmospheric CO2 in parts per million (ppm) versus time over the past 400 million years. The Geologic Carbon Cycle (GEOCARB) Model simulation is depicted by the black line; also shown (as dots) are publicly archived proxy data for paleosol carbon isotopes (red), phytoplankton carbon isotopes (green), stomatal indices (blue), marine boron isotopes (black), and liverwort carbon isotopes (cyan). (b) Ocean surface pH, shown in red, has increased over the last 50 million years as atmospheric CO2 declined. [Data sources: Panel (a) from Royer 2006. Data are publicly available at www.ncdc.noaa.gov/data-access/ paleoclimatology-data/datasets/climate-forcing. Panel (b) proxy data from Hönisch et al., 2012.]
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This figure was created on February 16, 2018.
This figure was submitted on March 15, 2019.
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