Stable Carbon Cycle-Climate Relationship During the Late Pleistocene

Siegenthaler, Urs; Stocker, Thomas F.; Monnin, Éric; Lůthi, Dieter; Schwander, Jakob; Stauffer, Bernhard; Raynaud, Dominique; Barnola, Jean-Marc; Fischer, Hubertus; Masson-Delmotte, Valérie; Jouzel, Jean

Stable Carbon Cycle-Climate Relationship During the Late Pleistocene

2005

A record of atmospheric carbon dioxide (CO₂) concentrations measured on the EPICA (European Project for Ice Coring in Antarctica) Dome Concordia ice core extends the Vostok CO₂ record back to 650,000 years before the present (yr B.P.). Before 430,000 yr B.P., partial pressure of atmospheric CO₂ 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 CO₂ remains stable throughout the six glacial cycles, suggesting that the relationship between CO₂ and Antarctic climate remained rather constant over this interval.

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