The Cryosphere
The Cryosphere
TC
Articles | Volume 19, issue 3
Articles | Volume 19, issue 3
https://doi.org/10.5194/tc-19-1353-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/tc-19-1353-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 19, issue 3
Research article
 | 
26 Mar 2025
Research article |  | 26 Mar 2025

Inland migration of near-surface crevasses in the Amundsen Sea Sector, West Antarctica

Andrew O. Hoffman, Knut Christianson, Ching-Yao Lai, Ian Joughin, Nicholas Holschuh, Elizabeth Case, Jonathan Kingslake, and the GHOST science team

Supplement

https://doi.org/10.5194/tc-19-1353-2025-supplement

Model code and software

hoffmaao/thwaites_crevasses: crevasse segmentation initial release (v0.0.0) Andrew Hoffman https://doi.org/10.5281/zenodo.14994659

hoffmaao/EarthMasker: earth masker initial release (v0.0.0) Andrew Hoffman https://doi.org/10.5281/zenodo.14994657

Video supplement

Grounded Ice Crevasse expansion near the grounded bight of Thwaites Glacier Andrew Hoffman https://doi.org/10.5446/62770

Grounded-ice crevasse expansion near the interior subglacial lakes beneath Thwaites Glacier Andrew Hoffman https://doi.org/10.5446/62771

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Short summary
We use satellite and ice-penetrating radar technology to segment crevasses in the Amundsen Sea Embayment. Inspection of satellite time series reveals inland expansion of crevasses where surface stresses have increased. We develop a simple model for the strength of densifying snow and show that these crevasses are likely restricted to the near surface. This result bridges discrepancies between satellite and lab experiments and reveals the importance of porosity on surface crevasse formation.
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