Results 41 to 50 of about 16,380 (300)

Modeling Ice‐Crystal Fabric as a Proxy for Ice‐Stream Stability [PDF]

Journal of Geophysical Research: Earth Surface, 2021
AbstractThe crystal structure within an ice sheet evolves in response to deformation; hence ice‐crystal fabric records ice‐flow history. However, the complexity of crystal‐fabric evolution, and the lack of model results with which to compare data, limit the usefulness of fabric measurements, particularly in areas with complex ice dynamics. Here, we use
David A. Lilien, Nicholas M. Rathmann, Christine S. Hvidberg, Dorthe Dahl‐Jensen   +3 more
openaire   +2 more sources

Bedrock controls on subglacial landform distribution and geomorphological processes : evidence from the Late Devensian Irish Sea Ice Stream [PDF]

, 2010
Ice streams play an important role as regulators of the behaviour of modern ice sheets, taking the form of corridors of fast flowing ice. Similar zones of fast moving ice have also been recognised draining the margins of the Late Devensian British and ...
Everest, Jez, Diaz Doce, Diego, Phillips, Emrys   +2 more
core   +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

Streamlined hard beds formed by palaeo-ice streams: a review [PDF]

, 2015
Fast-flowing ice streams occur within modern ice sheets and also operated in Pleistocene ice sheets. The reconstruction of palaeo-ice streams normally relies on the mapping of mega-scale glacial lineations (MSGLs) and drumlins composed of soft sediment ...
Putkinen, Niko, Bradwell, Tom, Eyles, Nick, Krabbendam, Maarten, Arbelaez-Moreno, Lina   +4 more
core   +1 more source

Subtemperate sliding reduces periodicity of ice stream temporal variability in a simple model

Journal of Glaciology
Understanding the formation and evolution of fast flowing ice streams is essential to projecting the response of ice sheets to climate forcings. Slow-flowing or stagnant ice streams can slide at low velocities over a bed that is below the bulk melting ...
Logan Elliott Mann, Colin Meyer, Alexander Robel, Elisa Mantelli   +3 more
doaj   +1 more source

Ice sheet extent and early deglacial history of the southwestern sector of the Greenland ice sheet [PDF]

, 2009
The offshore and coastal geomorphology of southwest Greenland records evidence for the advance and decay of the Greenland Ice Sheet during the Last Glacial Maximum.
Xu, S., Davies, Bethan J., Schnabel, C., Xu, Sheng, Sheng, X., Simpson, M.J.R., Simpson., M.J.R, Huybrechts, P., Roberts, David H., Long, A.J., Huybrechts, Philipe, Long, Antony J., Davies, B., Simpson, Matthew J.R., Schnabel, Christoph, Roberts, D.H., Davies, B.J.   +16 more
core   +1 more source

Treatment of the ice-shelf backpressure and buttressing in two horizontal dimensions

Journal of Glaciology
The ice discharge from the grounded parts of marine ice sheets into the ocean is modulated by their floating extensions – ice shelves. The ice-shelf impact on the grounded ice is typically described as ‘backpressure’ or ‘buttressing’.
Olga Sergienko
doaj   +1 more source

Emergence of the Shackleton Range from beneath the Antarctic Ice Sheet due to glacial erosion [PDF]

, 2014
This paper explores the long-term evolution of a subglacial fjord landscape in the Shackleton Range, Antarctica. We propose that prolonged ice-sheet erosion across a passive continental margin caused troughs to deepen and lower the surrounding ice-sheet ...
Kerr, A. R., Hein, AS, Sugden, David, Stuart, F. M., Hein, A. S.; id_orcid, Sugden, DE, Fogwill, C. J., Kubik, PW, Kubik, P. W., Stuart, FM, Fogwill, CJ ; https://orcid.org/, Kerr, AR   +11 more
core   +1 more source

Insights into ice stream dynamics through modelling their response to tidal forcing [PDF]

The Cryosphere, 2014
The tidal forcing of ice streams at their ocean boundary can serve as a natural experiment to gain an insight into their dynamics and constrain the basal sliding law.
S. H. R. Rosier, G. H. Gudmundsson, J. A. M. Green   +2 more
doaj   +1 more source

Reconstructing ice dynamics in the central sector of the last British-Irish Ice Sheet [PDF]

, 2010
The central sector (NW England and Scottish borders) of the last British-Irish Ice Sheet exhibits a palimpsest glacial geological and geomorphological signature characteristic of multi-phase ice flow and ice-marginal fluctuations. Despite its influential
LIVINGSTONE, STEPHEN,JOHN, Livingstone, Stephen John   +1 more
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