Results 51 to 60 of about 16,453 (301)

Trimlines, blockfields and the vertical extent of the last ice sheet in southern Ireland [PDF]

, 2015
The research reported here was supported by UK NERC grant NER/B/S/2001/0919Trimlines separating glacially abraded lower slopes from blockfield-covered summits on Irish mountains have traditionally been interpreted as representing the upper limit of the ...
Stone, John O., John O. Stone, Ballantyne, Colin, Colin K. Ballantyne   +3 more
core   +1 more source

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

Sensitivity of Heinrich-type ice-sheet surge characteristics to boundary forcing perturbations [PDF]

Climate of the Past, 2023
Heinrich-type ice-sheet surges are one of the prominent signals of glacial climate variability. They are characterised as abrupt, quasi-periodic episodes of ice-sheet instabilities during which large numbers of icebergs are released from the Laurentide ...
C. Schannwell, U. Mikolajewicz, F. Ziemen, M.-L. Kapsch   +3 more
doaj   +1 more source

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

Summer CO2 evasion from streams and rivers in the Kolyma River basin, north-east Siberia [PDF]

, 2013
Inland water systems are generally supersaturated in carbon dioxide (CO2) and are increasingly recognized as playing an important role in the global carbon cycle.
Holmes, Robert, Frey, Karen E., Mann, Paul, Denfeld, Blaize A., Denfeld, Blaize A.,, Robert M. Holmes, Paul J. Mann, William V. Sobczak, Sobczak, William, Holmes, Robert M., Frey, Karen, Blaize A. Denfeld, Sobczak, William V., Mann, Paul J., Denfeld, Blaize, Karen E. Frey   +15 more
core   +2 more sources

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

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

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