Ice-proximal sea ice reconstruction in the Powell Basin, Antarctica, since the Last Interglacial

Khoo, Wee Wei; Müller, Juliane; Esper, Oliver; Xiao, Wenshen; Stepanek, Christian; Gierz, Paul; Lohmann, Gerrit; Geibert, Walter; Hefter, Jens; Mollenhauer, Gesine

doi:https://doi.org/10.5194/cp-21-299-2025

Articles | Volume 21, issue 1

https://doi.org/10.5194/cp-21-299-2025

© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/cp-21-299-2025

© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 21, issue 1

Research article

|

31 Jan 2025

Research article |

| 31 Jan 2025

Ice-proximal sea ice reconstruction in the Powell Basin, Antarctica, since the Last Interglacial

Wee Wei Khoo, Juliane Müller, Oliver Esper, Wenshen Xiao, Christian Stepanek, Paul Gierz, Gerrit Lohmann, Walter Geibert, Jens Hefter, and Gesine Mollenhauer

Supplement

https://doi.org/10.5194/cp-21-299-2025-supplement

Data sets

Sea-ice distribution and ocean temperature variation in the Powell Basin and Scotia Sea, inferred from marine sediment cores PS118_63-1 and PS67/219-1 Wee Wei Khoo et al. https://doi.org/10.1594/PANGAEA.965042

Simulated seasonal sea surface temperature, subsurface ocean temperature, and sea ice distribution for selected periods of the last two glacial cycles Christian Stepanek et al. https://doi.org/10.1594/PANGAEA.972654

Short summary

Using a multiproxy approach, we analyzed biomarkers and diatom assemblages from a marine sediment core from the Powell Basin, Weddell Sea. The results reveal the first continuous coastal Antarctic sea ice record since the Last Penultimate Glacial. Our findings contribute valuable insights into past glacial–interglacial sea ice responses to a changing climate and enhance our understanding of ocean–sea ice–ice shelf interactions and dynamics.