Articles | Volume 12, issue 4
Clim. Past, 12, 819–835, 2016
https://doi.org/10.5194/cp-12-819-2016

Special issue: Climatic and biotic events of the Paleogene

Clim. Past, 12, 819–835, 2016
https://doi.org/10.5194/cp-12-819-2016

Research article 06 Apr 2016

Research article | 06 Apr 2016

Revisiting carbonate chemistry controls on planktic foraminifera Mg /  Ca: implications for sea surface temperature and hydrology shifts over the Paleocene–Eocene Thermal Maximum and Eocene–Oligocene transition

David Evans et al.

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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 (19 Oct 2015) by Appy Sluijs
AR by David Evans on behalf of the Authors (18 Jan 2016)  Author's response    Manuscript
ED: Referee Nomination & Report Request started (25 Jan 2016) by Appy Sluijs
RR by James C. Zachos (16 Feb 2016)
RR by Anonymous Referee #2 (11 Mar 2016)
ED: Publish subject to technical corrections (21 Mar 2016) by Appy Sluijs
AR by David Evans on behalf of the Authors (24 Mar 2016)  Author's response    Manuscript
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Short summary
We show that seawater pH exerts a substantial control on planktic foraminifera Mg / Ca, a widely applied palaeothermometer. As a result, temperature reconstructions based on this proxy are likely inaccurate over climatic events associated with a significant change in pH. We examine the implications of our findings for hydrological and temperature shifts over the Paleocene-Eocene Thermal Maximum and for the degree of surface ocean precursor cooling before the Eocene-Oligocene transition.