Ensemble reconstruction constraints on the global carbon cycle sensitivity to climate

David C. Frank (), Jan Esper, Christoph C. Raible, Ulf Büntgen, Valerie Trouet, Benjamin Stocker and Fortunat Joos
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David C. Frank: Swiss Federal Research Institute WSL, Zürcherstrasse 111, CH-8903 Birmensdorf, Switzerland
Jan Esper: Johannes Gutenberg University, Becherweg 21, 55099 Mainz, Germany
Christoph C. Raible: Oeschger Centre for Climate Change Research, University of Bern, Zähringerstrasse 25, CH-3012 Bern, Switzerland
Ulf Büntgen: Swiss Federal Research Institute WSL, Zürcherstrasse 111, CH-8903 Birmensdorf, Switzerland
Valerie Trouet: Swiss Federal Research Institute WSL, Zürcherstrasse 111, CH-8903 Birmensdorf, Switzerland
Benjamin Stocker: Oeschger Centre for Climate Change Research, University of Bern, Zähringerstrasse 25, CH-3012 Bern, Switzerland
Fortunat Joos: Oeschger Centre for Climate Change Research, University of Bern, Zähringerstrasse 25, CH-3012 Bern, Switzerland

Nature, 2010, vol. 463, issue 7280, 527-530

Abstract: CO2 feedback recalculated Climate warming tends to cause a net release of CO2, which in turn causes an amplification of warming. Estimates of the magnitude of this effect vary widely, leading to a wide range in global warming projections. Recent work suggested that the magnitude of this positive feedback might be about 40 parts per million by volume of CO2 per °C of warming. David Frank and colleagues use three Antarctic ice cores and a suite of climate reconstructions to show that the feedback is likely to be much smaller, with a median of only about 8 p.p.m.v. CO2 per °C.

Date: 2010
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DOI: 10.1038/nature08769

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