High-resolution carbon dioxide concentration record 650,000–800,000 years before present

Dieter Lüthi (), Martine Le Floch, Bernhard Bereiter, Thomas Blunier, Jean-Marc Barnola, Urs Siegenthaler, Dominique Raynaud, Jean Jouzel, Hubertus Fischer, Kenji Kawamura and Thomas F. Stocker
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Dieter Lüthi: Climate and Environmental Physics, Physics Institute, University of Bern, Sidlerstrasse 5, CH-3012 Bern, Switzerland, and Oeschger Centre for Climate Change Research, University of Bern, Erlachstrasse 9a, CH-3012 Bern, Switzerland
Martine Le Floch: Laboratoire de Glaciologie et Géophysique de l'Environnement (LGGE), CNRS-Université Joseph Fourier Grenoble, 54 Rue Molière, 38402 St Martin d'Hères, France
Bernhard Bereiter: Climate and Environmental Physics, Physics Institute, University of Bern, Sidlerstrasse 5, CH-3012 Bern, Switzerland, and Oeschger Centre for Climate Change Research, University of Bern, Erlachstrasse 9a, CH-3012 Bern, Switzerland
Thomas Blunier: Climate and Environmental Physics, Physics Institute, University of Bern, Sidlerstrasse 5, CH-3012 Bern, Switzerland, and Oeschger Centre for Climate Change Research, University of Bern, Erlachstrasse 9a, CH-3012 Bern, Switzerland
Jean-Marc Barnola: Laboratoire de Glaciologie et Géophysique de l'Environnement (LGGE), CNRS-Université Joseph Fourier Grenoble, 54 Rue Molière, 38402 St Martin d'Hères, France
Urs Siegenthaler: Climate and Environmental Physics, Physics Institute, University of Bern, Sidlerstrasse 5, CH-3012 Bern, Switzerland, and Oeschger Centre for Climate Change Research, University of Bern, Erlachstrasse 9a, CH-3012 Bern, Switzerland
Dominique Raynaud: Laboratoire de Glaciologie et Géophysique de l'Environnement (LGGE), CNRS-Université Joseph Fourier Grenoble, 54 Rue Molière, 38402 St Martin d'Hères, France
Jean Jouzel: Institut Pierre Simon Laplace/Laboratoire des Sciences du Climat et de l'Environnement, CEA-CNRS-University Versailles-Saint Quentin, CE Saclay, Orme des Merisiers, 91191 Gif-sur-Yvette, France
Hubertus Fischer: Alfred Wegener Institute for Polar and Marine Research (AWI), Columbusstrasse, D-27568 Bremerhaven, Germany
Kenji Kawamura: Climate and Environmental Physics, Physics Institute, University of Bern, Sidlerstrasse 5, CH-3012 Bern, Switzerland, and Oeschger Centre for Climate Change Research, University of Bern, Erlachstrasse 9a, CH-3012 Bern, Switzerland
Thomas F. Stocker: Climate and Environmental Physics, Physics Institute, University of Bern, Sidlerstrasse 5, CH-3012 Bern, Switzerland, and Oeschger Centre for Climate Change Research, University of Bern, Erlachstrasse 9a, CH-3012 Bern, Switzerland

Nature, 2008, vol. 453, issue 7193, 379-382

Abstract: Cover caption The air bubbles trapped in the Antarctic Vostok and EPICA Dome C ice cores provide composite records of levels of atmospheric carbon dioxide and methane covering the past 650,000 years. Now the record of atmospheric carbon dioxide and methane concentrations has been extended by two more complete glacial cycles to 800,000 years ago. The new data are from the lowest 200 metres of the Dome C core. This ice core went down to just a few metres above bedrock at a depth of 3,260 metres. Two papers report analyses of this deep ice, including the lowest carbon dioxide concentration so far measured in an ice core. Atmospheric carbon dioxide is strongly correlated with Antarctic temperature throughout the eight glacial cycles, but with significantly lower concentrations between 650,000 and 750,000 years before present. The cover shows a strip of ice core from an Antarctic ice core from Berkner Island, this slice from a depth of 120 metres. Photo by Chris Gilbert, British Antarctic Survey. Elsewhere in this issue, we move from climates past to future plans for climate prediction.

Date: 2008
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DOI: 10.1038/nature06949

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