Icequake observations were combined with an analytical friction model to measure friction and slip at the bed of an Antarctic ice stream. Friction and slip are found to be highly variable in space and time, controlled by higher-than-expected normal stresses at the ice–bed interface.
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References
Rignot, E., Mouginot, J. & Scheuchl, B. Ice flow of the Antarctic ice sheet. Science 333, 1427–1430 (2011). An article that highlights the importance of glacier slip for moving ice off the continent and into the oceans.
Ritz, C. et al. Potential sea-level rise from Antarctic ice-sheet instability constrained by observations. Nature 528, 115–118 (2015). This paper reports how glacier slip is poorly constrained in numerical ice dynamics models.
Oppenheimer, M. et al. in IPCC Special Report on the Ocean and Cryosphere in a Changing Climate (eds Pörtner, H.-O. et al.) 321–445 (IPCC, Cambridge Univ. Press, 2019). A report reviewing the key areas of uncertainty in current sea-level-rise projections.
Gräff, D. & Walter, F. Changing friction at the base of an Alpine glacier. Sci. Rep. 11, 10872 (2021). An article presenting how icequakes are useful for studying glacier stick–slip behaviour.
Zoet, L. K. & Iverson, N. R. A slip law for glaciers on deformable beds. Science 368, 76–78 (2020). This paper reports a glacier slip law based on rate-and-state friction, evidenced by laboratory observations.
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This is a summary of: Hudson, T. S. et al. Highly variable friction and slip observed at Antarctic ice stream bed. Nat. Geosci. https://doi.org/10.1038/s41561-023-01204-4 (2023).
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Icequakes used to measure friction and slip at a glacier bed. Nat. Geosci. 16, 556–557 (2023). https://doi.org/10.1038/s41561-023-01207-1
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DOI: https://doi.org/10.1038/s41561-023-01207-1
