Assessing the robustness of Antarctic temperature reconstructions over the past 2 millennia using pseudoproxy and data assimilation experiments

Klein, François; Abram, Nerilie J.; Curran, Mark A. J.; Goosse, Hugues; Goursaud, Sentia; Masson-Delmotte, Valérie; Moy, Andrew; Neukom, Raphael; Orsi, Anaïs; Sjolte, Jesper; Steiger, Nathan; Stenni, Barbara; Werner, Martin

doi:https://doi.org/10.5194/cp-15-661-2019

Articles | Volume 15, issue 2

https://doi.org/10.5194/cp-15-661-2019

© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/cp-15-661-2019

© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 15, issue 2

Research article

|

05 Apr 2019

Research article |

| 05 Apr 2019

Assessing the robustness of Antarctic temperature reconstructions over the past 2 millennia using pseudoproxy and data assimilation experiments

François Klein, Nerilie J. Abram, Mark A. J. Curran, Hugues Goosse, Sentia Goursaud, Valérie Masson-Delmotte, Andrew Moy, Raphael Neukom, Anaïs Orsi, Jesper Sjolte, Nathan Steiger, Barbara Stenni, and Martin Werner

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Final revised paper (published on 05 Apr 2019)
Supplement to the final revised paper
Preprint (discussion started on 14 Aug 2018)

Interactive discussion

Status: closed

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

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- Supplement

RC1: 'Review of Klein et al', Anonymous Referee #1, 08 Nov 2018
- AC1: 'Answer to referee 1', François Klein, 11 Feb 2019
RC2: 'comments reviewer 2', Anonymous Referee #2, 14 Jan 2019
- AC2: 'Answer to referee 2', François Klein, 11 Feb 2019

Peer-review completion

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

ED: Publish subject to minor revisions (review by editor) (17 Feb 2019) by Julie Loisel

AR by François Klein on behalf of the Authors (27 Feb 2019) Manuscript

ED: Publish as is (05 Mar 2019) by Julie Loisel

AR by François Klein on behalf of the Authors (05 Mar 2019) Manuscript

Short summary

Antarctic temperature changes over the past millennia have been reconstructed from isotope records in ice cores in several studies. However, the link between both variables is complex. Here, we investigate the extent to which this affects the robustness of temperature reconstructions using pseudoproxy and data assimilation experiments. We show that the reconstruction skill is limited, especially at the regional scale, due to a weak and nonstationary covariance between δ¹⁸O and temperature.