[PDF] Top 20 Ice stream grounding-line stability on a reverse bed slope
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Ice stream grounding-line stability on a reverse bed slope
... in ice-stream trough width play a fundamental role in controlling non-linear retreat ...controlled grounding-line stabilisation effect via two ...the ice stream increases as its ... See full document
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The stability of grounding lines on retrograde slopes
... of grounding lines located on reverse bed slopes have been used repeatedly in the past as the sole basis on which to argue that large sections of WAIS are either unstable, or close to a threshold of ... See full document
9
Ice-stream demise dynamically conditioned by trough shape and bed strength
... rapid grounding-line de- stabilization via marine ice sheet instability ( 6 – 9 ) ...major bed obstacles, and an initially widening trough upstream of GZW17, indicating that once underway, ... See full document
15
Interaction of marine ice-sheet instabilities in two drainage basins: simple scaling of geometry and transition time
... the ice flow is much larger than the perturbation timescale and thus the grounding-line retreat sets in not before the ice divide has almost reached its maximum displacement ...the ... See full document
15
Future Antarctic bed topography and its implications for ice sheet dynamics
... the ice sheet. A recently improved ice loading history suggests that the Antarctic Ice Sheet (AIS) has generally been losing its mass since the Last Glacial ...the Ice Sheet System Model ... See full document
16
Simulated dynamic regrounding during marine ice sheet retreat
... re- grounding to occur is beyond the scope of the current study, it does provide insight into possible conditions when reground- ing may ...the ice sheet is clearly im- portant, as advection of thicker ... See full document
12
Diagnosing ice sheet grounding line stability from landform morphology
... While ice grounding is fundamentally dictated by water depth, at a regional scale grounding line landform morphol- ogy does not appear to be strongly governed by proper- ties of the bed ... See full document
20
Deglaciation and future stability of the Coats Land ice margin, Antarctica
... Antarctic Ice Sheet discharges into the Weddell Sea via the Coats Land ice ...changing ice-sheet con- figuration in this region through its last glacial advance and Holocene retreat and to identify ... See full document
17
Ice-shelf buttressing and the stability of marine ice sheets
... Abstract. Ice-shelf buttressing and the stability of marine- type ice sheets are investigated ...stable grounding line is located on a bed sloping upwards in the direction of ... See full document
9
Persistence and variability of ice-stream grounding lines on retrograde bed slopes
... Second, ice-stream grounding lines on or near retrograde slopes may exhibit behaviors which are not predicted by ex- isting theories for grounding-line stability or internal ... See full document
14
How dynamic are ice-stream beds?
... apparent stability of the bed we observe is also worth considering in the context of debate concerning strain dis- tribution in deforming beds and associated till ...an ice-stream bed ... See full document
14
Semi-brittle rheology and ice dynamics in DynEarthSol3D
... of ice within many ice sheet models is often treated using linear elastic fracture mechan- ics ...2015). Ice rheology has been studied using both geophysical observations and laboratory experiments ... See full document
16
Sheet, stream, and shelf flow as progressive ice-bed uncoupling: Byrd Glacier, Antarctica and Jakobshavn Isbrae, Greenland
... of ice thickness and height above sea level is linked to the decreasing strength of ice- bed coupling along flowlines from an interior ice divide to the calving front of an ice ... See full document
33
Neutral equilibrium and forcing feedbacks in marine ice sheet modelling
... of ice shelves can cause convergence problems, both at a sub-grid scale (Seroussi and Morlighem, 2018) and over multiple grid cells or elements (Gladstone et ...the grounding line (in this case ... See full document
11
Understanding the influence of slope on the threshold of coarse grain motion: Revisiting critical stream power
... and bed shear stress (following the work of du Boys, ...of bed-material entrainment recognised the physical importance of a critical near-bed velocity, the difficulties in defining a constant ... See full document
37
Quantifying bed roughness beneath contemporary and palaeo-ice streams
... CONCLUSION 477 We compared the bed roughness of the deglaciated Minch Palaeo-Ice Stream MPIS in Scotland, to 478 the contemporary Institute and Möller Ice Streams IMIS in West Antarctica[r] ... See full document
29
The influence of stream bed stability and channel dynamics on lotic ecoystems: measurement and methodological advances : a thesis presented in partial fulfilment of the requirements for the degree of Doctor of Philosophy in Ecology at Massey University, Palmerston North, New Zealand
... On a global scale New Zealand mountain streams are regarded as severely impacted by loss of biotic integrity (e.g. caused by water abstraction for hydroelectricity and irrigation or introduced species), and moderately ... See full document
263
Subglacial landforms beneath Rutford Ice Stream, Antarctica: detailed bed topography from ice-penetrating radar
... profile line, reflections (or diffractions from point sources) can arise from points ahead of or behind the ...the line renders these in-line but off-nadir reflections into hyperbolae on the record, ... See full document
8
Analytical solutions for the surface response to small amplitude perturbations in boundary data in the shallow-ice-stream approximation
... law exponent m for wavelengths smaller than the one given by Eq. (36) may, thus, well be a general feature of glacier flow. Schoof (2005) gives arguments suggesting that at high slip ratios the surface response becomes ... See full document
17
Sea-level response to melting of Antarctic ice shelves on multi-centennial timescales with the fast Elementary Thermomechanical Ice Sheet model (f.ETISh v1.0)
... the grounding-line flux conditions (SGL and TGL) that make the model resolution ...resolve grounding-line migration at sub-kilometre resolutions (Pattyn et ... See full document
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