Englacial pore water localizes shear in temperate ice stream margins

M Haseloff, IJ Hewitt, RF Katz - Journal of Geophysical …, 2019 - Wiley Online Library
The margins of fast‐moving ice streams are characterized by steep velocity gradients. Some
of these gradients cannot be explained by a temperature‐dependent viscosity alone …

The relationship between the permeability and liquid water content of polycrystalline temperate ice

JR Fowler, NR Iverson - Journal of Glaciology, 2023 - cambridge.org
To better constrain meltwater transport and ice viscosity in temperate glaciers, particularly in
ice stream shear margins, we use a custom permeameter to study the untested model …

A permeameter for temperate ice: first results on permeability sensitivity to grain size

JR Fowler, NR Iverson - Journal of Glaciology, 2022 - cambridge.org
Results of ice-stream models that treat temperate ice deformation as a two-phase flow are
sensitive to the ice permeability. We have constructed and begun using a custom, falling …

A model for the downstream evolution of temperate ice and subglacial hydrology along ice stream shear margins

CR Meyer, A Yehya, B Minchew… - Journal of Geophysical …, 2018 - Wiley Online Library
Antarctic mass balance and contribution to sea level rise are dominated by the flow of ice
through narrow conduits called ice streams. These regions of relatively fast flow drain over …

The role of sliding in ice stream formation

C Schoof, E Mantelli - Proceedings of the Royal Society …, 2021 - royalsocietypublishing.org
Ice streams are bands of fast-flowing ice in ice sheets. We investigate their formation as an
example of spontaneous pattern formation, based on positive feedbacks between …

The role of subtemperate slip in thermally driven ice stream margin migration

M Haseloff, C Schoof, O Gagliardini - The Cryosphere, 2018 - tc.copernicus.org
The amount of ice discharged by an ice stream depends on its width, and the widths of
unconfined ice streams such as the Siple Coast ice streams in West Antarctica have been …

Bistatic radar tomography of shear margins: Simulated temperature and basal material inversions

N Bienert, DM Schroeder… - IEEE Transactions on …, 2022 - ieeexplore.ieee.org
A significant portion of the sea level contributions of Antarctica and Greenland comes from
ice streams, but the physical processes controlling ice stream width are poorly understood …

Wet subglacial bedforms of the NE Greenland Ice Stream shear margins

KL Riverman, S Anandakrishnan, RB Alley… - Annals of …, 2019 - cambridge.org
We describe elongate, wet, subglacial bedforms in the shear margins of the NE Greenland
Ice Stream and place some constraints on their formation. Lateral shear margin moraines …

Contrasting hydrological controls on bed properties during the acceleration of Pine Island Glacier, West Antarctica

M Bougamont, P Christoffersen, I Nias… - Journal of …, 2019 - Wiley Online Library
In the Amundsen sector of West Antarctica, the flow of glaciers accelerates when intrusion of
warm ocean water onto the continental shelf induces strong melting beneath ice shelves …

The coupled dynamics of meltwater percolation and granular deformation in the sediment layer underlying parts of the big ice sheets

A Damsgaard, A Cabrales-Vargas, J Suckale… - Poromechanics …, 2017 - ascelibrary.org
Ice streams are corridors of fast flowing ice that drain the interiors of the large Antarctic and
Greenlandic ice sheets. The abrupt transition from the fast flowing ice of the streams to the …