The Cryosphere
The Cryosphere
TC
Articles | Volume 18, issue 11
Articles | Volume 18, issue 11
https://doi.org/10.5194/tc-18-5101-2024
© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/tc-18-5101-2024
© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 18, issue 11
Research article
 | 
08 Nov 2024
Research article |  | 08 Nov 2024

Application of a regularised Coulomb sliding law to Jakobshavn Isbræ, western Greenland

Matt Trevers, Antony J. Payne, and Stephen L. Cornford

Supplement

https://doi.org/10.5194/tc-18-5101-2024-supplement

Data sets

IceBridge BedMachine Greenland. (IDBMG4, Version 3) M. Morlighem et al. https://doi.org/10.5067/2CIX82HUV88Y

MEaSUREs Greenland Ice Mapping Project (GIMP) Digital Elevation Model (NSIDC-0645, Version 1) I. Howat et al. https://doi.org/10.5067/NV34YUIXLP9W

MEaSUREs Greenland Ice Sheet Velocity Map from InSAR Data (NSIDC-0478, Version 2) I. Joughin et al. https://doi.org/10.5067/OC7B04ZM9G6Q

MEaSUREs Greenland Monthly Ice Sheet Velocity Mosaics from SAR and Landsat (NSIDC-0731, Version 1) I. Joughin https://doi.org/10.5067/OPFQ9QDEUFFY

MEaSUREs Greenland Ice Velocity: Selected Glacier Site Velocity Maps from InSAR (NSIDC-0481, Version 2) I. Joughin et al. https://doi.org/10.5067/JQHJUOYCF2TE

Model code and software

matttrevers/bisicles-camip: bisicles_ji_mjt (bisicles_ji_mjt) Stephen Cornford et al. https://doi.org/10.5281/zenodo.14013750

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Short summary
The form of the friction law which determines the speed of ice sliding over the bedrock remains a major source of uncertainty in ice sheet model projections of future sea level rise. Jakobshavn Isbræ, the fastest-flowing glacier in Greenland, which has undergone significant changes in the last few decades, is an ideal case for testing sliding laws. We find that a regularised Coulomb friction law reproduces the large seasonal and inter-annual flow speed variations most accurately.
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