Articles | Volume 17, issue 2
Clim. Past, 17, 703–719, 2021
https://doi.org/10.5194/cp-17-703-2021
Clim. Past, 17, 703–719, 2021
https://doi.org/10.5194/cp-17-703-2021

Research article 26 Mar 2021

Research article | 26 Mar 2021

Atmospheric carbon dioxide variations across the middle Miocene climate transition

Markus Raitzsch et al.

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Interactive discussion

Status: closed
Status: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
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Peer-review completion

AR: Author's response | RR: Referee report | ED: Editor decision
ED: Reconsider after major revisions (26 Oct 2020) by Appy Sluijs
AR by Markus Raitzsch on behalf of the Authors (21 Dec 2020)  Author's response    Author's tracked changes    Manuscript
ED: Referee Nomination & Report Request started (04 Jan 2021) by Appy Sluijs
RR by Anonymous Referee #1 (19 Jan 2021)
RR by Anonymous Referee #2 (07 Feb 2021)
ED: Publish subject to minor revisions (review by editor) (09 Feb 2021) by Appy Sluijs
AR by Markus Raitzsch on behalf of the Authors (17 Feb 2021)  Author's response    Author's tracked changes    Manuscript
ED: Publish as is (17 Feb 2021) by Appy Sluijs
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Short summary
At approximately 14 Ma, the East Antarctic Ice Sheet expanded to almost its current extent, but the role of CO2 in this major climate transition is not entirely known. We show that atmospheric CO2 might have varied on 400 kyr cycles linked to the eccentricity of the Earth’s orbit. The resulting change in weathering and ocean carbon cycle affected atmospheric CO2 in a way that CO2 rose after Antarctica glaciated, helping to stabilize the climate system on its way to the “ice-house” world.