Articles | Volume 13, issue 9
Clim. Past, 13, 1259–1267, 2017

Special issue: Publications by EGU Medallists

Clim. Past, 13, 1259–1267, 2017

Research article 25 Sep 2017

Research article | 25 Sep 2017

The Plio-Pleistocene climatic evolution as a consequence of orbital forcing on the carbon cycle

Didier Paillard

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Subject: Carbon Cycle | Archive: Modelling only | Timescale: Milankovitch
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Cited articles

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Bassinot, F., Beaufort, L., Vincent, E., Labeyrie, L., Rostek, F., Müller, P., Quidelleur, X., and Lancelot, Y.: Coarse fraction fluctuations in pelagic carbonate sediments from the tropical Indian Ocean: A 1500-kyr record of carbonate dissolution, Paleoceanography, 9, 579–600, 1994.
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Short summary
Ice ages are paced by astronomical parameters. On longer timescales, the astronomy also acts on climate, as evidenced by the 400 kyr signature observed in carbon isotopic records. In this paper, I present a conceptual model that links the astronomy to the dynamics of organic carbon in coastal areas. The model reproduces the carbon isotopic records and a two-step decrease in atmospheric CO2 that would explain the Pleistocene (~ 2.8 Myr BP) and mid-Pleistocene (~ 0.8 Myr BP) transition.