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  • Presentation | C33H: Research in Active Conservation Methods for Ice Sheets and Glaciers Poster
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  • C33H-1038: Basal Anchoring for Ice Streams and Mountain Glaciers with Different Subglacial Hydrologies
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  • Board 1038‚ Hall EFG (Poster Hall)
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Author(s):
Neelanjan Akuli, Stanford University (First Author, Presenting Author)
Cooper Elsworth, Carbon Data Solutions @ Google
Jenny Suckale, Stanford University


Rapid ice mass loss from fast-moving glaciers and ice streams could be potentially mitigated by increasing resistance at their bed and anchoring them. We assess the feasibility and potential efficacy of such basal anchoring through interventions in how subglacial water flows under glaciers and ice streams. We compare how Water Films, Linked Cavities, R-channels and Sedimentary Canals modulate spatial variations in basal strength to understand where basal anchoring could lead to a noticeable reduction in ice mass loss.


We analyze ice flow across a 2D vertical cross-sectional plane of both a typical ice stream with a flat bed of till, and a typical valley-confined glacier with a variably-sloped mixed bed of hard bedrock and till. We implement a coupled model for capturing the temperature-dependent non-Newtonian ice flow behavior, including distinct sliding behaviors over till and hard bedrock. Our model determines the self-consistent shear margin location and surface ice speed based on an integrated force balance.


We find that flowrate reduction in Sedimentary Canals could reduce ice mass loss significantly from both glaciers and ice streams, while changes in R-channel flowrate have no effect. Also, off-target intervention around any hydrological conduit may lead to a minor reduction in surface ice speed.




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