The stability of present-day Antarctic grounding lines – Part 1:  No indication of marine ice sheet instability in the current geometry

Hill, Emily A.; Urruty, Benoît; Reese, Ronja; Garbe, Julius; Gagliardini, Olivier; Durand, Gaël; Gillet-Chaulet, Fabien; Gudmundsson, G. Hilmar; Winkelmann, Ricarda; Chekki, Mondher; Chandler, David; Langebroek, Petra M.

doi:https://doi.org/10.5194/tc-17-3739-2023

Articles | Volume 17, issue 9

https://doi.org/10.5194/tc-17-3739-2023

© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/tc-17-3739-2023

© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 17, issue 9

Research article

|

07 Sep 2023

Research article |

| 07 Sep 2023

The stability of present-day Antarctic grounding lines – Part 1: No indication of marine ice sheet instability in the current geometry

Emily A. Hill, Benoît Urruty, Ronja Reese, Julius Garbe, Olivier Gagliardini, Gaël Durand, Fabien Gillet-Chaulet, G. Hilmar Gudmundsson, Ricarda Winkelmann, Mondher Chekki, David Chandler, and Petra M. Langebroek

Supplement

https://doi.org/10.5194/tc-17-3739-2023-supplement

Data sets

Datasets of TC-2022-104 Emily A. Hill, Benoît Urruty, Ronja Reese, Julius Garbe, Olivier Gagliardini, Fabien Gillet-Chaulet, G. Hilmar Gudmundsson, Winkelmann, Ricarda Winkelmann, Mondher Chekki, David Chandler, and Petra M. Langebroek https://doi.org/10.5281/zenodo.8086404

Model code and software

GHilmarG/UaSource: Ua2019b (Version v2019b) Hilmar Gudmundsson https://doi.org/10.5281/zenodo.3706624

Short summary

The grounding lines of the Antarctic Ice Sheet could enter phases of irreversible retreat or advance. We use three ice sheet models to show that the present-day locations of Antarctic grounding lines are reversible with respect to a small perturbation away from their current position. This indicates that present-day retreat of the grounding lines is not yet irreversible or self-enhancing.