Modeling past atmospheric CO2: Results of a challenge
Article first published online: 3 JUN 2011
©2005. American Geophysical Union. All Rights Reserved.
Eos, Transactions American Geophysical Union
Volume 86, Issue 38, pages 341–345, 20 September 2005
How to Cite
2005), Modeling past atmospheric CO2: Results of a challenge, Eos Trans. AGU, 86(38), 341–345, doi:10.1029/2005EO380003., et al. (
- Issue published online: 3 JUN 2011
- Article first published online: 3 JUN 2011
The models and concepts used to predict future climate are based on physical laws and information obtained from observations of the past. New paleoclimate records are crucial for a test of our current understanding.
The Vostok ice core record [Petit et al., 1999] showed that over the past 420 kyr (1 kyr = 1000 years), Antarctic climate and concentrations of the greenhouse gases carbon dioxide (CO2) and methane (CH4,) were tightly coupled. In particular, CO2 seemed to be confined between bounds of about 180 ppmv (parts per million by volume) in glacial periods and 280 ppmv in interglacials; both gases rose and fell with climate as the Earth passed through four glacial/interglacial cycles.