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.
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.
the Creative Commons Attribution 4.0 License.
Research article
| 
05 Apr 2019
Research article |
| 05 Apr 2019
| 05 Apr 2019
Assessing the robustness of Antarctic temperature reconstructions over the past 2 millennia using pseudoproxy and data assimilation experiments
François Klein
CORRESPONDING AUTHOR
Georges Lemaître Centre for Earth and Climate Research (TECLIM), Earth and Life Institute
(ELI),
Université catholique de Louvain (UCL), Louvain-La-Neuve, Belgium
Nerilie J. Abram
Research School of Earth Sciences, Australian National University, Canberra, ACT 2601, Australia
ARC Centre of Excellence for Climate Extremes, Australian National University, Canberra, ACT 2601, Australia
Mark A. J. Curran
Australian Antarctic Division, 203 Channel Highway, Kingston, Tasmania 7050, Australia
Antarctic Climate & Ecosystems Cooperative Research Centre, University of Tasmania, Hobart, Tasmania 7001, Australia
Hugues Goosse
Georges Lemaître Centre for Earth and Climate Research (TECLIM), Earth and Life Institute
(ELI),
Université catholique de Louvain (UCL), Louvain-La-Neuve, Belgium
Sentia Goursaud
Laboratoire des Sciences du Climat et de l'Environnement (IPSL/CEA-CNRS-UVSQ UMR 8212),
CEA Saclay, 91191 Gif-sur-Yvette CEDEX, France
Laboratoire de Glaciologie et Géophysique de l'Environnement (LGGE), Université Grenoble Alpes, 38041 Grenoble, France
Valérie Masson-Delmotte
Laboratoire des Sciences du Climat et de l'Environnement (IPSL/CEA-CNRS-UVSQ UMR 8212),
CEA Saclay, 91191 Gif-sur-Yvette CEDEX, France
Andrew Moy
Australian Antarctic Division, 203 Channel Highway, Kingston, Tasmania 7050, Australia
Antarctic Climate & Ecosystems Cooperative Research Centre, University of Tasmania, Hobart, Tasmania 7001, Australia
Raphael Neukom
Oeschger Centre for Climate Change Research & Institute of Geography, University of Bern, 3012 Bern, Switzerland
Anaïs Orsi
Laboratoire des Sciences du Climat et de l'Environnement (IPSL/CEA-CNRS-UVSQ UMR 8212),
CEA Saclay, 91191 Gif-sur-Yvette CEDEX, France
Jesper Sjolte
Department of Geology – Quaternary Science, Lund University, Sölvegatan 12, 223 62, Lund, Sweden
Nathan Steiger
Lamont-Doherty Earth Observatory, Columbia University, Palisades, New York, USA
Barbara Stenni
Department of Environmental Sciences, Informatics and Statistics, Ca' Foscari University of Venice, Venice, Italy
Institute for the Dynamics of Environmental Processes, CNR, Venice, Italy
Martin Werner
Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, 27570 Bremerhaven, Germany
Data sets
Data assimilation-based surface temperature reconstructions over the last two millennia over Antarctica F. Klein, N. J. Abram, M. A. J. Curran, H. Goosse, S. Goursaud, V. Masson-Delmotte, A. Moy, R. Neukom, A. Orsi, J. Sjolte, N. Steiger, B. Stenni, and M. Werner https://doi.org/10.5281/zenodo.2579204
Historical climate model output of ECHAM5-wiso from 1871-2011 at T106 resolution N. J. Steiger https://doi.org/10.5281/zenodo.1249604
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.
Antarctic temperature changes over the past millennia have been reconstructed from isotope...
