Crystal orientation fabric anisotropy causes directional hardening of the Northeast Greenland Ice Stream [PDF]
Nature Communications, 2023 The dynamic mass loss of ice sheets constitutes one of the biggest uncertainties in projections of ice-sheet evolution. One central, understudied aspect of ice flow is how the bulk orientation of the crystal orientation fabric translates to the ...
Tamara Annina Gerber +22 more
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Interplay of grounding-line dynamics and sub-shelf melting during retreat of the Bjørnøyrenna Ice Stream [PDF]
Scientific Reports, 2018 The Barents Sea Ice Sheet was a marine-based ice sheet, i.e., it rested on the Barents Sea floor during the Last Glacial Maximum (21 ky BP). The Bjørnøyrenna Ice Stream was the largest ice stream draining the Barents Sea Ice Sheet and is regarded as an ...
Michele Petrini +9 more
doaj +2 more sources
Stochastic ice stream dynamics. [PDF]
Proc Natl Acad Sci U S A, 2016 Significance Ice streams form the backbone of the flow field of ice sheets. They are known to exhibit a complex spatiotemporal dynamics, which is largely not well understood. Understanding the controls on such dynamics is crucial to sea level change projections as well as to the interpretation of paleorecords.
Mantelli E, Bertagni MB, Ridolfi L.
europepmc +5 more sources
Holocene thinning in central Greenland controlled by the Northeast Greenland Ice Stream [PDF]
Nature CommunicationsIce-core records from the interior of the Greenland ice sheet suggest widespread thinning during the Holocene. However, the recurring underestimation of this thinning in numerical models raises concerns about both the veracity of such reconstructions and
Ilaria Tabone +3 more
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Shear margins in upper half of Northeast Greenland Ice Stream were established two millennia ago [PDF]
Nature CommunicationsOnly a few localised ice streams drain most of the ice from the Greenland Ice Sheet. Thus, understanding ice stream behaviour and its temporal variability is crucially important to predict future sea-level change.
Daniela Jansen +19 more
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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
Double Reflections in Polarized Radar Data Reveal Ice Fabric in the North East Greenland Ice Stream
Geophysical Research LettersThe orientation of ice crystals within large ice masses has a strong influence on their mechanical properties, but cannot be directly observed from the surface.
Niels F. Nymand +7 more
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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
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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
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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