Sensitivity of centennial mass loss projections of  the Amundsen basin to the friction law

Brondex, Julien; Gillet-Chaulet, Fabien; Gagliardini, Olivier

doi:https://doi.org/10.5194/tc-13-177-2019

Articles | Volume 13, issue 1

https://doi.org/10.5194/tc-13-177-2019

© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/tc-13-177-2019

© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 13, issue 1

Research article

|

22 Jan 2019

Research article |

| 22 Jan 2019

Sensitivity of centennial mass loss projections of the Amundsen basin to the friction law

Julien Brondex, Fabien Gillet-Chaulet, and Olivier Gagliardini

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Final revised paper (published on 22 Jan 2019)
Supplement to the final revised paper
Preprint (discussion started on 24 Sep 2018)

Interactive discussion

Status: closed

AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment

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- Supplement

RC1: 'Review of Brondex et al. 2018 TCD', Mathieu Morlighem, 15 Oct 2018
- AC1: 'Authors' response to referee #1', Julien Brondex, 13 Dec 2018
RC2: 'Review of Sensitivity of centennial mass loss projections of the Amundsen basin to the friction law by Brondex et al.', Thomas Kleiner, 12 Nov 2018
- AC2: 'Authors' response to referee #2', Julien Brondex, 13 Dec 2018

Peer-review completion

AR: Author's response | RR: Referee report | ED: Editor decision

AR by Julien Brondex on behalf of the Authors (13 Dec 2018) Author's response Manuscript

ED: Referee Nomination & Report Request started (14 Dec 2018) by Carlos Martin

RR by Thomas Kleiner (19 Dec 2018)

ED: Publish subject to technical corrections (07 Jan 2019) by Carlos Martin

Short summary

Here, we apply a synthetic perturbation to the most active drainage basin of Antarctica and show that centennial mass loss projections obtained through ice flow models depend strongly on the implemented friction law, i.e. the mathematical relationship between basal drag and sliding velocities. In particular, the commonly used Weertman law considerably underestimates the sea-level contribution of this basin in comparison to two water pressure-dependent laws which rely on stronger physical bases.