Articles | Volume 19, issue 8
https://doi.org/10.5194/tc-19-2935-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/tc-19-2935-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
06 Aug 2025
Research article |
| 06 Aug 2025
| 06 Aug 2025
Impact of glacial isostatic adjustment on zones of potential grounding line persistence in the Ross Sea Embayment (Antarctica) since the Last Glacial Maximum
Earth and Planetary Science, University of California, Santa Cruz, Santa Cruz, CA, USA
Tamara Pico
Earth and Planetary Science, University of California, Santa Cruz, Santa Cruz, CA, USA
Alexander A. Robel
School of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, GA, USA
John Erich Christian
Department of Geography, University of Oregon, Eugene, OR, USA
Natalya Gomez
Earth and Planetary Sciences, McGill University, Montréal, Québec, Canada
Casey Vigilia
Jackson School of Geosciences, University of Texas at Austin, Austin, TX, USA
Evelyn Powell
Seismology, Geology and Tectonophysics, Lamont-Doherty Earth Observatory of Columbia University, Palisades, NY, USA
Jessica Gagliardi
Earth and Planetary Science, University of California, Santa Cruz, Santa Cruz, CA, USA
Slawek Tulaczyk
Earth and Planetary Science, University of California, Santa Cruz, Santa Cruz, CA, USA
Terrence Blackburn
Earth and Planetary Science, University of California, Santa Cruz, Santa Cruz, CA, USA
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Tamara Pico, Jane Willenbring, April S. Dalton, and Sidney Hemming
Clim. Past Discuss., https://doi.org/10.5194/cp-2021-132, https://doi.org/10.5194/cp-2021-132, 2021
Manuscript not accepted for further review
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We present data from fieldwork completed in 2002 for a glacial lake in the Torngat Mountains (Northern Quebec and Labrador, Canada). We dated the lake to ~56 ± 3 ka and estimated the freshwater volume that may have been released during an outburst flood. The location of this glacial lake is surprising because the Torngat Mountains are considered a site of glacial inception, and this shoreline suggests the region was not ice-covered throughout the North American ice sheet growth phase.
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Short summary
We predicted how sea level changed in the Ross Sea (Antarctica) due to glacial isostatic adjustment, or solid Earth ice sheet interactions, over the last deglaciation (20 000 years ago to present) and calculated how these changes in bathymetry impacted ice stream stability. Glacial isostatic adjustment shifts stability from where ice reached its maximum 20 000 years ago, at the continental shelf edge, to the modern grounding line today, reinforcing ice-age climate endmembers.
We predicted how sea level changed in the Ross Sea (Antarctica) due to glacial isostatic...
