Results 71 to 80 of about 1,037,031 (170)

Superimposition of ribbed moraines on a palaeo‐ice‐stream bed: implications for ice stream dynamics and shutdown [PDF]

Earth Surface Processes and Landforms, 2008
AbstractThe sediments and landforms preserved on palaeo‐ice‐stream beds can provide important information about their subglacial conditions and flow mechanisms, and the processes accompanying their shutdown. In this paper, detailed observations of an intriguing subglacial landform assemblage of ribbed moraines superimposed on glacial lineations on the ...
Stokes, C.R., Lian, O.B., Tulaczyk, S., Clark, C.D.   +3 more
openaire   +3 more sources

Basal topographic controls on the stability of the West Antarctic ice sheet: lessons from Foundation Ice Stream

Annals of Glaciology, 2017
Using observations of basal topography, ice thickness and modern accumulation rates, we use theory and a dynamic flowline model to examine the sensitivity of Antarctica's Foundation Ice Stream to changes in sea level, accumulation and buttressing at the ...
Kathleen Huybers, Gerard Roe, Howard Conway   +2 more
doaj   +1 more source

Temporal variations in the flow of a large Antarctic ice stream controlled by tidally induced changes in the subglacial water system [PDF]

The Cryosphere, 2015
Observations show that the flow of Rutford Ice Stream (RIS) is strongly modulated by the ocean tides, with the strongest tidal response at the 14.77-day tidal period (Msf). This is striking because this period is absent in the tidal forcing.
S. H. R. Rosier, G. H. Gudmundsson, J. A. M. Green   +2 more
doaj   +1 more source

A viscoelastic model of ice stream flow with application to stick-slip motion

Frontiers in Earth Science, 2016
Stick-slip motion such as that observed at Whillans Ice Stream, WestAntarctica, is one example of transient forcing significantly affecting longer-termice-stream dynamics.
Ryan Thomas Walker, Ryan Thomas Walker, Byron eParizek, Richard eAlley, Sophie eNowicki   +4 more
doaj   +1 more source

Ice streams in the Laurentide Ice Sheet: a new mapping inventory [PDF]

Journal of Maps, 2014
Rapidly flowing ice streams dominate the drainage of continental ice sheets and are a key component of their mass balance. Due to their potential impact on sea level, their activity in the Antarctic and Greenland Ice Sheets has undergone detailed scrutiny in recent decades.
Margold, M., Stokes, C.R., Clark, C.D., Kleman, J.   +3 more
openaire   +4 more sources

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

The glacial geomorphology of the tweed valley and surrounding area, eastern British Isles. [PDF]

, 2009
This project focuses on reconstructing the glacial dynamics of the Tweed Valley and surrounding area in the Scottish Borders and northeast Northumberland from the glacial geomorphological record.
Staines, Kate E.H.
core  

Exploring Antarctic Feedback Mechanisms Using Two‐Way Coupled Subglacial Hydrology and Ice Flow Modeling in the Siple Coast

Geophysical Research Letters
The Siple Coast region of West Antarctica is known for its fast flowing, topographically unconstrained ice streams that evolve due to subglacial conditions.
Koi McArthur, Christine Dow, Shivani Ehrenfeucht   +2 more
doaj   +1 more source

Switch-off of a major enhanced ice flow unit in East Antarctica [PDF]

, 2006
The East Antarctic Ice Sheet (EAIS) is the largest reservoir of ice on the planet by an order of magnitude. Compared with the West Antarctic Ice Sheet (WAIS), it is traditionally considered to be relatively stable, with only minor adjustments to its ...
Corr, Hugh F.J., Rippin, David M., Siegert, MJ, Bamber, JL, Vaughan, DG, Bamber, Jonathan L., Corr, HFJ, Vaughan, David G., Corr, Hugh F. J., Siegert, Martin J., Rippin, DM   +10 more
core   +1 more source

Sensitivity tests of coupled ice-sheet/ice-stream dynamics in the EISMINT experimental ice block

, 1996
A continuum mixture model of coupled ice-sheet/ice-stream dynamics has been developed within a conventional three-dimensional finite-difference model framework. The ice mass is areally divided into sheet-ice and stream-ice components.
Garry K. C. Clarke, Shawn J. Marshall
core   +2 more sources