Atmospheric carbon dioxide levels for the last 500 million years

Proceedings of the National Academy of Sciences of the United States of America
Daniel H Rothman

Abstract

The last 500 million years of the strontium-isotope record are shown to correlate significantly with the concurrent record of isotopic fractionation between inorganic and organic carbon after the effects of recycled sediment are removed from the strontium signal. The correlation is shown to result from the common dependence of both signals on weathering and magmatic processes. Because the long-term evolution of carbon dioxide levels depends similarly on weathering and magmatism, the relative fluctuations of CO2 levels are inferred from the shared fluctuations of the isotopic records. The resulting CO2 signal exhibits no systematic correspondence with the geologic record of climatic variations at tectonic time scales.

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Citations

Jan 25, 2006·Photosynthesis Research·Abir U Igamberdiev, Peter J Lea
Oct 25, 2007·Proceedings. Biological Sciences·Peter J MayhewTimothy G Benton
Apr 12, 2007·The American Naturalist·Stephen J Tonsor, Samuel M Scheiner
Jun 5, 2015·Proceedings of the National Academy of Sciences of the United States of America·Gijsbert D A WernerE Toby Kiers
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Apr 6, 2016·The Journal of Biological Chemistry·Andrew C SelfridgeCormac T Taylor
Apr 12, 2017·Proceedings of the National Academy of Sciences of the United States of America·Graham A Shields, Benjamin J W Mills
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Mar 27, 2021·Ecology and Evolution·Dandan WangYongzhi Yang
Jul 5, 2003·Science·Peter A Raymond, Jonathan J Cole

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