D. Historical and Typical Carbon Dioxide Fluctuations

The Historical CO2 fluctuations over the last 570 million years [World Data Center for Paleoclimatology and NOOA Paleoclimatology Program; R.A. and Z. Kothavala, 2001, GEOCARB III: A Revised Model of Atmospheric CO2 over Phanerozoic Time, IGBP PAGES/World Data Center for Paleoclimatology Data Contribution Series # 2002-051, NOAA/NGDC Paleoclimatology Program, Boulder CO, USA] is shown in the below graph of that data.