Dynamics of ice stream temporal variability: Modes, scales, and hysteresis
Journal of Geophysical Research F: Earth Surface, 2013 Understanding the mechanisms governing temporal variability of ice stream flow remains one of the major barriers to developing accurate models of ice sheet dynamics and ice‒climate interactions.
E Degiuli
exaly +2 more sources
Ocean driven retreat of the Northeast Greenland Ice Stream following the Last Glacial Maximum [PDF]
Nature CommunicationsThe Northeast Greenland Ice Stream (NEGIS), the largest ice stream draining the Greenland Ice Sheet (GrIS), is losing mass at an accelerating rate due to atmospheric and ocean-driven melting.
S. Louise Callard +6 more
doaj +2 more sources
Sensitivity of Heinrich-type ice-sheet surge characteristics to boundary forcing perturbations [PDF]
Climate of the Past, 2023 Heinrich-type ice-sheet surges are one of the prominent signals of glacial climate variability. They are characterised as abrupt, quasi-periodic episodes of ice-sheet instabilities during which large numbers of icebergs are released from the Laurentide ...
C. Schannwell +3 more
doaj +1 more source
The role of subtemperate slip in thermally driven ice stream margin migration [PDF]
The Cryosphere, 2018 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 observed to evolve on decadal to centennial timescales.
M. Haseloff +4 more
doaj +1 more source
Radar attenuation demonstrates advective cooling in the Siple Coast ice streams
Journal of Glaciology, 2023 Ice streams are warmed by shear strain, both vertical shear near the bed and lateral shear at the margins. Warm ice deforms more easily, establishing a positive feedback loop in an ice stream where fast flow leads to warm ice and then to even faster flow.
Benjamin H. Hills +4 more
doaj +1 more source
Modeling the elastic transmission of tidal stresses to great distances inland in channelized ice streams [PDF]
The Cryosphere, 2014 Geodetic surveys suggest that ocean tides can modulate the motion of Antarctic ice streams, even at stations many tens of kilometers inland from the grounding line.
J. Thompson, M. Simons, V. C. Tsai
doaj +1 more source
Subglacial hydrological control on flow of an Antarctic Peninsula palaeo-ice stream [PDF]
The Cryosphere, 2019 Basal hydrological systems play an important role in controlling the dynamic behaviour of ice streams. Data showing their morphology and relationship to geological substrates beneath modern ice streams are, however, sparse and difficult to collect.
R. D. Larter +13 more
doaj +1 more source
Thermal controls on ice stream shear margins
Journal of Glaciology, 2021 Ice stream discharge responds to a balance between gravity, basal friction and lateral drag. Appreciable viscous heating occurs in shear margins between ice streams and adjacent slow-moving ice ridges, altering the temperature-dependent viscosity ...
Pierce Hunter +4 more
doaj +1 more source
Ice-stream flow switching by up-ice propagation of instabilities along glacial marginal troughs [PDF]
The Cryosphere, 2019 Ice-stream networks constitute the arteries of ice sheets through which large volumes of glacial ice are rapidly delivered from the continent to the ocean.
E. Brouard, P. Lajeunesse
doaj +1 more source
Upstream flow effects revealed in the EastGRIP ice core using Monte Carlo inversion of a two-dimensional ice-flow model [PDF]
The Cryosphere, 2021 The Northeast Greenland Ice Stream (NEGIS) is the largest active ice stream on the Greenland Ice Sheet (GrIS) and a crucial contributor to the ice-sheet mass balance.
T. A. Gerber +8 more
doaj +1 more source