Stable Carbon Cycle–Climate Relationship During the Late Pleistocene

Author:

Siegenthaler Urs1234,Stocker Thomas F.1234,Monnin Eric1234,Lüthi Dieter1234,Schwander Jakob1234,Stauffer Bernhard1234,Raynaud Dominique1234,Barnola Jean-Marc1234,Fischer Hubertus1234,Masson-Delmotte Valérie1234,Jouzel Jean1234

Affiliation:

1. Climate and Environmental Physics, Physics Institute, University of Bern, Sidlerstrasse 5, CH-3012 Bern, Switzerland.

2. Laboratoire de Glaciologie et de Géophysique de l'Environnement (CNRS), 54 Rue Molières, 38402 St. Martin d'Hères Cedex, France.

3. Alfred Wegener Institute for Polar and Marine Research (AWI), Columbusstrasse, D-27568 Bremerhaven, Germany.

4. Institut Pierre Simon Laplace/Laboratoire des Sciences du Climat et de l'Environnement, CEA-CNRS 1572, CE Saclay, Orme des Merisiers, 91191 Gif-sur-Yvette, France.

Abstract

A record of atmospheric carbon dioxide (CO 2 ) concentrations measured on the EPICA (European Project for Ice Coring in Antarctica) Dome Concordia ice core extends the Vostok CO 2 record back to 650,000 years before the present (yr B.P.). Before 430,000 yr B.P., partial pressure of atmospheric CO 2 lies within the range of 260 and 180 parts per million by volume. This range is almost 30% smaller than that of the last four glacial cycles; however, the apparent sensitivity between deuterium and CO 2 remains stable throughout the six glacial cycles, suggesting that the relationship between CO 2 and Antarctic climate remained rather constant over this interval.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

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