Results 51 to 60 of about 1,312,001 (200)

Ice-stream stability on a reverse bed slope [PDF]

Nature Geoscience, 2012
Marine ice streams whose beds deepen inland are thought to be inherently unstable. Numerical modelling of the Maguerite Bay ice-stream retreat in West Antarctica since the Last Glacial Maximum suggests that an ice stream can stabilize on an inland-sloping bed owing to increased lateral drag where the ice stream narrows.
Jamieson, Stewart S.R., Vieli, Andreas, Livingstone, Stephen J., Ó Cofaigh, Colm, Stokes, Chris, Hillenbrand, Claus-Dieter, Dowdeswell, Julian A.   +6 more
openaire   +5 more sources

Subglacial controls on the flow of Institute Ice Stream, West Antarctica

Annals of Glaciology, 2016
The Institute Ice Stream (IIS) rests on a reverse-sloping bed, extending >150 km upstream into the ~1.8 km deep Robin Subglacial Basin, placing it at the threshold of marine ice-sheet instability. Understanding IIS vulnerability has focused on the effect
M. Siegert, N. Ross, Jilu Li, D. Schroeder, D. Rippin, D. Ashmore, R. Bingham, P. Gogineni   +7 more
semanticscholar   +1 more source

Ice streams—fast, and faster?

Comptes Rendus. Physique, 2004
Abstract Rapid flow of ice streams is caused either by great thickness, or by effective basal lubrication especially from deforming tills. Competing thermal processes act to stabilize and to destabilize the well-lubricated ice streams, and may contribute to their observed short-term variability yet long-term persistence. Increasing evidence indicates
Richard B. Alley, Byron R. Parizek, T. K. Dupont, Sridhar Anandakrishnan   +3 more
openaire   +2 more sources

The periodic topography of ice stream beds: Insights from the Fourier spectra of mega‐scale glacial lineations

, 2017
Ice stream bed topography contains key evidence for the ways ice streams interact with, and are potentially controlled by, their beds. Here we present the first application of two‐dimensional Fourier analysis to 22 marine and terrestrial topographies ...
M. Spagnolo, T. Bartholomaus, C. Clark, C. Stokes, N. Atkinson, J. Dowdeswell, J. Ely, A. Graham, K. Hogan, E. King, R. Larter, S. Livingstone, H. Pritchard   +12 more
semanticscholar   +1 more source

High-resolution LiDAR mapping of glacial landforms and ice stream lobes in Finland

, 2017
Newly available high resolution airborne LiDAR (Light Detection And Ranging) technology is generating unprecedented next-generation imagery of Earth surface features.
N. Putkinen, N. Eyles, S. Putkinen, A. Ojala, J. Palmu, P. Sarala, T. Väänänen, J. Räisänen, J. Saarelainen, N. Ahtonen, Hannu Rönty, A. Kiiskinen, Tom Rauhaniemi, T. Tervo   +13 more
semanticscholar   +1 more source

Subglacial processes on an Antarctic ice stream bed. 2: Can modelled ice dynamics explain the morphology of mega-scale glacial lineations?

Journal of Glaciology, 2016
Mega-scale glacial lineations (MSGLs) are highly elongate subglacial bedforms associated with ice streaming. However, the link between MSGLs and rapid ice flow is largely qualitative, and there have been few attempts to quantitatively link their ...
S. Jamieson, C. Stokes, S. Livingstone, A. Vieli, C. Ó Cofaigh, C. Hillenbrand, M. Spagnolo   +6 more
semanticscholar   +1 more source

Order in Antarctic ice streams [PDF]

Nature Geoscience, 2015
Ice streams transport ice rapidly from the interior of the Antarctic ice sheet to the coast. An analysis of surface flow convergence suggests that ice flow and geometry are intricately linked within these ice streams.
openaire   +2 more sources

Crevasse refreezing and signatures of retreat observed at Kamb Ice Stream grounding zone. [PDF]

Nat Geosci, 2023
Lawrence JD, Washam PM, Stevens C, Hulbe C, Horgan HJ, Dunbar G, Calkin T, Stewart C, Robinson N, Mullen AD, Meister MR, Hurwitz BC, Quartini E, Dichek DJG, Spears A, Schmidt BE.   +15 more
europepmc   +1 more source

Giant Grooves Made by Concentrated Basal Ice Streams [PDF]

, 1979
Richard P. Goldthwait
openalex   +1 more source

Model Studies on Ice-Stream Surging [PDF]

, 1989
Uwe Radok, B. J. McInnes, D. Jenssen, W. F. Budd   +3 more
openalex   +1 more source