Results 11 to 20 of about 401,804 (204)

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, Knut Christianson, Robert W. Jacobel, Howard Conway, Rickard Pettersson   +4 more
doaj   +1 more source

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   +6 more sources

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   +4 more sources

Ice Streams of the Laurentide Ice Sheet [PDF]

Géographie physique et Quaternaire, 2006
Ice streams had a major influence on the configuration and the stability of the Laurentide Ice Sheet. Their identification is crucial for an understanding of ice sheet behaviour and their importance is reflected by the recent increase in paleo-ice stream research.
Winsborrow, Monica C.M., Clark, Chris D., Stokes, Chris R.   +2 more
openaire   +3 more sources

Ice stream formation

, 2021
<div>Ice streams are the arteries through which a large fraction of the ice lost from Antarctica is discharged. With the introduction of "higher order" mechanics, the representation of ice streams in ice sheet models appears to have become more robust, eliminating previously ubiquitous grid effects.
Christian Schoof, Elisa Mantelli
openaire   +3 more sources

Stochastic ice stream dynamics [PDF]

Proceedings of the National Academy of Sciences, 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, ELISA, BERTAGNI, MATTEO BERNARD, RIDOLFI, LUCA   +2 more
openaire   +4 more sources

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, K. A. Hogan, C.-D. Hillenbrand, J. A. Smith, C. L. Batchelor, M. Cartigny, A. J. Tate, J. D. Kirkham, J. D. Kirkham, Z. A. Roseby, Z. A. Roseby, G. Kuhn, A. G. C. Graham, J. A. Dowdeswell   +13 more
doaj   +1 more source

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

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

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, Colin Meyer, Brent Minchew, Marianne Haseloff, Alan Rempel   +4 more
doaj   +1 more source