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Cyclic Effective Pressure Loading Impacts Glacial Slip Over Deformable Beds
GEOPHYSICAL RESEARCH LETTERS
28 april 2025
Natasha Morgan-Witts, Dougal Hansen, Lucas Zoet, M...
Tidal fluctuations at the grounding zones of marine‐terminating glaciers induce oscillations in effective pressure at the glacier bed, alteri...
Shear‐Layer Thickness and Structure Evolves With Effective Stress in Subglacial Environments
GEOPHYSICAL RESEARCH LETTERS
24 march 2025
Ian Madden, Dougal Hansen, Lucas Zoet, Jenny Sucka...
Moving glaciers shear and deform the subglacial till beneath them, with deformation concentrated in a thin shear‐layer. This shear‐laye...
A Coupled Analysis of Experimentally Fractured Ice and EBSD Microstructural Analysis
IMPROVING UNDERSTANDING OF ICE DEFORMATION THROUGH OBSERVATIONS, MODELS, AND EXPERIMENTS I ORAL
cryosphere | 13 december 2024
Natasha Morgan-Witts, Maciej Trzeciak, Bil Schneid...
A major source of ice loss on ice sheets is due to fracture related processes leading to ice calving or destabilization through crevasse formation. A ...
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Linear-Viscous Deformation of Temperate Ice at Glaciologically Relevant Stresses, Grain Sizes, and Water Contents
IMPROVING UNDERSTANDING OF ICE DEFORMATION THROUGH OBSERVATIONS, MODELS, AND EXPERIMENTS I ORAL
cryosphere | 13 december 2024
Jacob Fowler, Collin Schohn, Neal R. Iverson, Luca...
In ice stream shear margins ice is commonly at its melting temperature at depth and coexists with liquid water at crystal boundaries. Accurately model...
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From granular media to glacial sediments: Upscaling microscopic porewater-sediment interactions in multidisperse tills to predict meltwater drainage
ADVANCES IN GLACIER AND ICE SHEET HYDROLOGY II POSTER
cryosphere | 12 december 2024
Ian Madden, Dougal Hansen, Lucas Zoet, Jenny Sucka...
Subglacial hydrology plays a major role in determining the flow of ice streams over deformable tills, propelling the overlying ice through a variety o...
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Regularized Coulomb-type slip response for frozen fringe sliding over till
“STRANGE ICE”: BRIDGING OBSERVATION, SAMPLING, AND MODELING EFFORTS TO ADDRESS THE UNSETTLED GLACIER AND ICE SHEET QUESTIONS III ELIGHTNING
cryosphere | 12 december 2024
Dougal Hansen, Kasia Warburton, Lucas Zoet, Colin ...
The relationship between ice speed and basal traction, known as the sliding law, remains a significant source of uncertainty in modeling glacier dynam...
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Modelling compaction in frozen subglacial sediments
ADVANCES IN GLACIER AND ICE SHEET HYDROLOGY II POSTER
cryosphere | 12 december 2024
Aaron G. Stubblefield, Colin Meyer, Kasia Warburto...
Ice-infiltrated sediment, or frozen fringe, is commonly found adhered to the base of glaciers. Recent experiments using a cryogenic ring shear device ...
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Multi-Component Rayleigh Wave Inversion for Velocity-Depth Profiling on the Saskatchewan Glacier, Canadian Rocky Mountains
CRYOGEOPHYSICS: INNOVATIONS AND DISCOVERIES THROUGH GEOPHYSICAL OBSERVATIONS OF COLD REGION ENVIRONMENTS II POSTER
near surface geophysics | 11 december 2024
Samara Omar, Matthew Siegfried, Jeffrey C. Shragge...
Estimating ice thickness, internal ice structure, and subglacial topography and composition are fundamental to understanding flow dynamics of glacial ...
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