Results 31 to 40 of about 63,696 (298)

Footprint of the Baltic Ice Stream: geomorphic evidence for shifting ice stream pathways

Boreas, 2023
The Baltic Ice Stream, a large fast‐flowing sector of the last Fennoscandian Ice Sheet that occupied the present‐day Baltic Sea basin, was first conceptualized in the earliest days of glacial geological research in Scandinavia. Landform and sedimentological evidence from the terrestrial margins support the concept and numerical ice‐sheet models ...
Sarah L. Greenwood, Rachael S. Avery, Richard Gyllencreutz, Carl Regnéll, Karol Tylmann   +4 more
openaire   +2 more sources

Antarctic palaeo-ice streams [PDF]

Earth-Science Reviews, 2012
We review the geomorphological, sedimentological and chronological evidence for palaeo-ice streams on the continental shelf of Antarctica and use this information to investigate basal conditions and processes, and to identify factors controlling grounding-line retreat.
Livingstone, Stephen J., Ó Cofaigh, Colm, Stokes, Chris R., Hillenbrand, Claus-Dieter, Vieli, Andreas, Jamieson, Stewart S.R.   +5 more
openaire   +7 more sources

Airborne radar evidence for tributary flow switching in Institute Ice Stream, West Antarctica: implications for ice sheet configuration and dynamics [PDF]

, 2015
Despite the importance of ice streaming to the evaluation of West Antarctic Ice Sheet (WAIS) stability we know little about mid- to long-term dynamic changes within the Institute Ice Stream (IIS) catchment.
Martin J. Siegert, Hugh F. J. Corr, Corr, Hugh, Bingham, RG, Woodward, John, Ross, Neil, Ross, N, Dunning, SA, Corr, Hugh F.J., Winter, K, Siegert, MJ, Robert G. Bingham, Winter, Kate, Dunning, Stuart, John Woodward, Neil Ross, Siegert, Martin, Corr, HFJ, Kate Winter, Dunning, Stuart A., Siegert, Martin J., Stuart A. Dunning, Bingham, Robert G., Woodward, J   +23 more
core   +1 more source

A thicker Antarctic ice stream during the mid-Pliocene warm period

Communications Earth & Environment, 2023
Ice streams regulate most ice mass loss in Antarctica. Determining ice stream response to warmer conditions during the Pliocene could provide insights into their future behaviour, but this is hindered by a poor representation of subglacial topography in ...
Martim Mas e Braga, Richard S. Jones, Jorge Bernales, Jane Lund Andersen, Ola Fredin, Mathieu Morlighem, Alexandria J. Koester, Nathaniel A. Lifton, Jonathan M. Harbor, Yusuke Suganuma, Neil F. Glasser, Irina Rogozhina, Arjen P. Stroeven   +12 more
doaj   +1 more source

Deformation in Rutford Ice Stream, West Antarctica: measuring shear-wave anisotropy from icequakes [PDF]

, 2013
Ice streams provide major drainage pathways for the Antarctic ice sheet. The stress distribution and style of flow in such ice streams produce elastic and rheological anisotropy, which informs ice-flow modelling as to how ice masses respond to external
Baird, A.F., Smith, A.M., Baird, A F, Stuart, G.W., Harland, S. R., Stuart, G. W., Kendall, J-M, Pritchard, H.D., Harland, S.R., Smith, A. M., Pritchard, H. D., Kendall, J.-M., Brisbourne, A.M., Brisbourne, A. M., Lloyd, G.E., Lloyd, G. E.   +15 more
core   +1 more source

Frequency response of ice streams [PDF]

Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences, 2012
Changes at the grounding line of ice streams have consequences for inland ice dynamics and hence sea level. Despite substantial evidence documenting upstream propagation of frontal change, the mechanisms by which these changes are transmitted inland are not well understood.
Williams, C. R., R. C. A. Hindmarsh, and R. J. Arthern   +3 more
openaire   +3 more sources

Variations in hydraulic efficiency of the subglacial drainage landsystem control surging and streaming regimes of outlet glaciers

Journal of Glaciology, 2023
Surging and streaming of glaciers are modulated by meltwater availability and pressure which controls mechanical coupling at their beds. Using laboratory-scale experimental modelling and palaeoglaciological mapping, we explore how subglacial drainage ...
Édouard Ravier, Thomas Lelandais, Jean Vérité, Olivier Bourgeois   +3 more
doaj   +1 more source

Potential subglacial lake locations and meltwater drainage pathways beneath the Antarctic and Greenland ice sheets [PDF]

, 2013
We use the Shreve hydraulic potential equation as a simplified approach to investigate potential subglacial lake locations and meltwater drainage pathways beneath the Antarctic and Greenland ice sheets. We validate the method by demonstrating its ability
Clark, Chris, Woodward, J., Livingstone, Stephen, Woodward, John, Clark, C.D., Kingslake, J., Livingstone, S.J., Livingstone, S. J., Clark, C. D., J. Kingslake, Kingslake, Jonathan, C. D. Clark, S. J. Livingstone, J. Woodward   +13 more
core   +1 more source

Ice stream subglacial access for ice sheet history and fast ice flow: The BEAMISH Project on Rutford Ice Stream, West Antarctica and initial results on basal conditions [PDF]

, 2021
Three holes were drilled to the bed of Rutford Ice Stream, through ice up to 2154 m thick, to investigate the basal processes and conditions associated with fast ice flow and the glacial history of the West Antarctic Ice Sheet.
Murray, T., Anker, P.G.D., Smith, A.M., Tavi Murray, Nicholls, K.W., Makinson, K., Brisbourne, A.M., Hodgson, D.A., Schlegel, R., Rios-Costas, S., Rebecca Schlegel, Anandkrishnan, S.   +11 more
core   +1 more source

Ice flow dynamics of the northwestern Laurentide Ice Sheet during the last deglaciation [PDF]

The Cryosphere
Reconstructions of palaeo-ice-stream activity provide insight into the processes governing ice stream evolution over millennial timescales. The northwestern sector of the Laurentide Ice Sheet experienced a period of rapid retreat driven by warming during
B. J. Stoker, H. E. Dulfer, H. E. Dulfer, C. R. Stokes, V. H. Brown, V. H. Brown, C. D. Clark, C. Ó Cofaigh, D. J. A. Evans, D. Froese, S. L. Norris, M. Margold   +11 more
doaj   +1 more source