Snapshots of mean ocean temperature over the last 700&thinsp;000 years using noble gases in the EPICA Dome C ice core

Haeberli, Marcel; Baggenstos, Daniel; Schmitt, Jochen; Grimmer, Markus; Michel, Adrien; Kellerhals, Thomas; Fischer, Hubertus

doi:https://doi.org/10.5194/cp-17-843-2021

Articles | Volume 17, issue 2

https://doi.org/10.5194/cp-17-843-2021

© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/cp-17-843-2021

© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 17, issue 2

Research article

| Highlight paper

|

14 Apr 2021

Research article | Highlight paper |

| 14 Apr 2021

Snapshots of mean ocean temperature over the last 700 000 years using noble gases in the EPICA Dome C ice core

Marcel Haeberli, Daniel Baggenstos, Jochen Schmitt, Markus Grimmer, Adrien Michel, Thomas Kellerhals, and Hubertus Fischer

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Final revised paper (published on 14 Apr 2021)
Preprint (discussion started on 08 Oct 2020)

Interactive discussion

Status: closed

AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment

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- Supplement

RC1: 'Review', Anonymous Referee #1, 27 Nov 2020
- AC1: 'Reply on RC1 and RC2', Hubertus Fischer, 22 Jan 2021
RC2: 'Review of Mean Ocean Temperature on EDC ice core', Jeff Severinghaus, 25 Dec 2020
- AC1: 'Reply on RC1 and RC2', Hubertus Fischer, 22 Jan 2021

Peer-review completion

AR: Author's response | RR: Referee report | ED: Editor decision

ED: Publish subject to minor revisions (review by editor) (25 Jan 2021) by Amaelle Landais

AR by Hubertus Fischer on behalf of the Authors (15 Feb 2021) Author's response Author's tracked changes Manuscript

ED: Publish as is (21 Feb 2021) by Amaelle Landais

Short summary

Using the temperature-dependent solubility of noble gases in ocean water, we reconstruct global mean ocean temperature (MOT) over the last 700 kyr using noble gas ratios in air enclosed in polar ice cores. Our record shows that glacial MOT was about 3 °C cooler compared to the Holocene. Interglacials before 450 kyr ago were characterized by about 1.5 °C lower MOT than the Holocene. In addition, some interglacials show transient maxima in ocean temperature related to changes in ocean circulation.