Journal cover Journal topic
Climate of the Past An interactive open-access journal of the European Geosciences Union
Journal topic

Journal metrics

IF value: 3.536
IF 5-year value: 3.967
IF 5-year
CiteScore value: 6.6
SNIP value: 1.262
IPP value: 3.90
SJR value: 2.185
Scimago H <br class='widget-line-break'>index value: 71
Scimago H
h5-index value: 40
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

  26 Feb 2020

26 Feb 2020

Review status
This preprint is currently under review for the journal CP.

Mid-Holocene Antarctic sea-ice increase driven by marine ice sheet retreat

Kate E. Ashley1, James A. Bendle1, Robert McKay2, Johan Etourneau3, Francis J. Jimenez-Espejo3,4, Alan Condron5, Anna Albot2, Xavier Crosta6, Christina Riesselman7,8, Osamu Seki9, Guillaume Massé10, Nicholas R. Golledge2,11, Edward Gasson12, Daniel P. Lowry2, Nicholas E. Barrand1, Katelyn Johnson2, Nancy Bertler2, Carlota Escutia3, and Robert Dunbar13 Kate E. Ashley et al.
  • 1School of Geography, Earth and Environmental Sciences, University of Birmingham, Edgbaston, Birmingham, B15 2TT, UK
  • 2Antarctic Research Centre, Victoria University of Wellington, Wellington 6140, New Zealand
  • 3Instituto Andaluz de Ciencias de la Tierra (CSIC), Avenida de las Palmeras 4, 18100 Armilla, Granada, Spain
  • 4Department of Biogeochemistry, Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Yokosuka 237-0061, Japan
  • 5Department of Geology and Geophysics, Woods Hole Oceanographic Institution, Woods Hole, MA 02543, USA
  • 6UMR-CNRS 5805 EPOC, Université de Bordeaux, 33615 Pessac, France
  • 7Department of Geology, University of Otago, Dunedin 9016, New Zealand
  • 8Department of Marine Science, University of Otago, Dunedin 9016, New Zealand
  • 9Institite of Low Temperature Science, Hokkaido University, Sapporo, Hokkaido, Japan
  • 10TAKUVIK, UMI 3376 UL/CNRS, Université Laval, 1045 avenue de la Médecine, Quebec City, Quebec G1V 0A6, Canada
  • 11GNS Science, Avalon, Lower Hutt 5011, New Zealand
  • 12Department of Geography, University of Sheffield, Winter Street, Sheffield, S10 2TN, UK
  • 13Department of Environmental Earth Systems Science, Stanford University, Stanford, A 94305-2115, USA

Abstract. Over recent decades Antarctic sea-ice extent has increased, alongside widespread ice shelf thinning and freshening of waters along the Antarctic margin. In contrast, Earth system models generally simulate a decrease in sea ice. Circulation of water masses beneath large cavity ice shelves is not included in current models and may be a driver of this phenomena. We examine a Holocene sediment core off East Antarctica that records the Neoglacial transition, the last major baseline shift of Antarctic sea-ice, and part of a late-Holocene global cooling trend. We provide a multi-proxy record of Holocene glacial meltwater input, sediment transport and sea-ice variability which includes. Our record, supported by high-resolution ocean modelling, shows that a rapid Antarctic sea-ice increase occurred against a backdrop of increasing glacial meltwater input and gradual climate warming. We suggest that mid-Holocene ice shelf cavity expansion led to supercooling of surface waters and sea-ice growth which slowed basal ice shelf melting. Incorporating this feedback mechanism into global climate models will be important for future projections of Antarctic changes.

Kate E. Ashley et al.

Interactive discussion

Status: final response (author comments only)
Status: final response (author comments only)
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
[Login for Authors/Editors] [Subscribe to comment alert] Printer-friendly Version - Printer-friendly version Supplement - Supplement

Kate E. Ashley et al.

Kate E. Ashley et al.


Total article views: 854 (including HTML, PDF, and XML)
HTML PDF XML Total Supplement BibTeX EndNote
613 207 34 854 51 37 40
  • HTML: 613
  • PDF: 207
  • XML: 34
  • Total: 854
  • Supplement: 51
  • BibTeX: 37
  • EndNote: 40
Views and downloads (calculated since 26 Feb 2020)
Cumulative views and downloads (calculated since 26 Feb 2020)

Viewed (geographical distribution)

Total article views: 709 (including HTML, PDF, and XML) Thereof 704 with geography defined and 5 with unknown origin.
Country # Views %
  • 1



No saved metrics found.


No discussed metrics found.
Latest update: 24 Sep 2020
Publications Copernicus