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The impact of Holocene deglaciation and glacial dynamics on the landscapes and geomorphology of Potter Peninsula, King George Island (Isla 25 Mayo), NW Antarctic Peninsula

Heredia Barión, Pablo A.; Strelin, Jorge A.; Roberts, Stephen J.; Spiegel, Cornelia; Wacker, Lukas; Niedermann, Samuel; Bentley, Michael J.; Pearson, Emma J.; Czalbowski, Nadia T. Manograsso; Davies, Sarah J.; Schnetger, Bernhard; Grosjean, Martin; Arcusa, Stephanie; Perren, Bianca; Hocking, Emma P.; Kuhn, Gerhard

The impact of Holocene deglaciation and glacial dynamics on the landscapes and geomorphology of Potter Peninsula, King George Island (Isla 25 Mayo), NW Antarctic Peninsula Thumbnail


Authors

Pablo A. Heredia Barión

Jorge A. Strelin

Stephen J. Roberts

Cornelia Spiegel

Lukas Wacker

Samuel Niedermann

Emma J. Pearson

Nadia T. Manograsso Czalbowski

Sarah J. Davies

Bernhard Schnetger

Martin Grosjean

Stephanie Arcusa

Bianca Perren

Emma P. Hocking

Gerhard Kuhn



Abstract

The timing and impact of deglaciation and Holocene readvances on the terrestrial continental margins of the Antarctic Peninsula (AP) have been well-studied but are still debated. Potter Peninsula on King George Island (KGI) (Isla 25 de Mayo), South Shetland Islands (SSI), NW Antarctic Peninsula, has a detailed assemblage of glacial landforms and stratigraphic exposures for constraining deglacial landscape development and glacier readvances. We undertook new morphostratigraphic mapping of the deglaciated foreland of the Warszawa Icefield, an outlet of the Bellingshausen (Collins) Ice Cap on Potter Peninsula, using satellite imagery and new lithofacies recognition and interpretations, combined with new chronostratigraphic analysis of stratigraphic sections, lake sediments, and moraine deposits. Results show that the deglaciation on Potter Peninsula began before c. 8.2 ka. Around c. 7.0 ka, the Warszawa Icefield and the marine-facing Fourcade Glacier readvanced across Potter Peninsula and to the outer part of Potter Cove. Evidence of further readvances on Potter Peninsula was absent until the Warszawa Icefield margin was landward of its present position on three occasions: c. 1.7–1.4 ka, after c. 0.7 ka (most likely c. 0.5–0.1 ka), and by 1956 CE. The timing of Holocene deglaciation and glacier fluctuations on Potter Peninsula are broadly coeval with other glacier- and ice-free areas on the SSI and the northern AP and likely driven by interactions between millennial–centennial-scale changes in solar insolation and irradiance, the southern westerlies, and the Southern Annular Mode.

Citation

Heredia Barión, P. A., Strelin, J. A., Roberts, S. J., Spiegel, C., Wacker, L., Niedermann, S., …Kuhn, G. (2023). The impact of Holocene deglaciation and glacial dynamics on the landscapes and geomorphology of Potter Peninsula, King George Island (Isla 25 Mayo), NW Antarctic Peninsula. Frontiers in Earth Science, 10, Article 1073075. https://doi.org/10.3389/feart.2022.1073075

Journal Article Type Article
Acceptance Date Dec 6, 2022
Online Publication Date Jan 4, 2023
Publication Date 2023
Deposit Date Jan 30, 2023
Publicly Available Date Jan 30, 2023
Journal Frontiers in Earth Science
Publisher Frontiers Media
Peer Reviewed Peer Reviewed
Volume 10
Article Number 1073075
DOI https://doi.org/10.3389/feart.2022.1073075

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Publisher Licence URL
http://creativecommons.org/licenses/by/4.0/

Copyright Statement
© 2023 Heredia Barión, Strelin, Roberts, Spiegel, Wacker, Niedermann, Bentley, Pearson, Czalbowski, Davies, Schnetger, Grosjean, Arcusa, Perren, Hocking and Kuhn. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.





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