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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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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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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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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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Constraints on effective stress in subglacial tills from lab-scale ultrasonic active seismic experiments
CRYOGEOPHYSICS: INNOVATIONS AND DISCOVERIES THROUGH GEOPHYSICAL OBSERVATIONS OF COLD REGION ENVIRONMENTS II POSTER
near surface geophysics | 11 december 2024
Dougal Hansen, Lucas Zoet, Atsuhiro Muto
Effective stress in subglacial till (ice overburden minus pore water pressure) is the primary control on bed strength for soft-bedded glaciers and ice...
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Cluster Analysis of Representative Storm Conditions and Threshold Water Levels Resulting in Overwash: Southern Lake Michigan, USA
BIOPHYSICAL AND PHYSICAL PROCESSES IN COASTAL ENVIRONMENTS: LINKING NEARSHORE TO ONSHORE PROCESSES THROUGH HYDRODYNAMICS, SEDIMENTARY PROCESSES, AND MORPHODYNAMICS III POSTER
earth and planetary surface processes | 11 december 2024
Chelsea Volpano, Lucas Zoet, Ethan J. Theuerkauf, ...
Coastal flooding by overwash causes loss of life, damage to infrastructure, and is mitigated by natural barriers like dunes. Overwash occurs when tota...
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