A new methodology to simulate subglacial deformation of water-saturated granular material

Damsgaard, A.; Egholm, D. L.; Piotrowski, J. A.; Tulaczyk, S.; Larsen, N. K.; Brædstrup, C. F.

doi:https://doi.org/10.5194/tc-9-2183-2015

Articles | Volume 9, issue 6

The Cryosphere, 9, 2183–2200, 2015

https://doi.org/10.5194/tc-9-2183-2015

© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.

The Cryosphere, 9, 2183–2200, 2015

https://doi.org/10.5194/tc-9-2183-2015

© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.

Articles | Volume 9, issue 6

Research article 20 Nov 2015

Research article | 20 Nov 2015

A new methodology to simulate subglacial deformation of water-saturated granular material

A. Damsgaard et al.

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Final revised paper (published on 20 Nov 2015)
Preprint (discussion started on 13 Jul 2015)

Interactive discussion

Status: closed

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

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RC C1350: 'Review of Damsgaard et al. by Neal Iverson', Neal R. Iverson, 04 Aug 2015
RC C1451: 'Comments', Anonymous Referee #2, 20 Aug 2015
- RC C1495: 'Corrected version', Anonymous Referee #2, 28 Aug 2015
AC C1947: 'Author reply', Anders Damsgaard, 26 Oct 2015
EC C2053: 'Editor Comment', Chris R. Stokes, 30 Oct 2015

Peer-review completion

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

AR by Anders Damsgaard on behalf of the Authors (26 Oct 2015) Author's response Manuscript

ED: Publish as is (13 Nov 2015) by Chris R. Stokes

Short summary

This paper details a new algorithm for performing computational experiments of subglacial granular deformation. The numerical approach allows detailed studies of internal sediment and pore-water dynamics under shear. Feedbacks between sediment grains and pore water can cause rate-dependent strengthening, which additionally contributes to the plastic shear strength of the granular material. Hardening can stabilise patches of the subglacial beds with implications for landform development.