Results 51 to 60 of about 57,626 (157)
Persistence and variability of ice-stream grounding lines on retrograde bed slopes [PDF]
The Cryosphere, 2016 In many ice streams, basal resistance varies in space and time due to the dynamically evolving properties of subglacial till. These variations can cause internally generated oscillations in ice-stream flow.
A. A. Robel, C. Schoof, E. Tziperman
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Ice flow in the northeast Greenland ice stream [PDF]
Annals of Glaciology, 2000 AbstractWe have measured ice flow and detailed topography in northeastern Greenland using satellite-based synthetic-aperture radar (SAR) interferometry. The subject of this study is the large ice stream that drains this quadrant of the ice sheet. A single SAR interferogram allows the measurement of one component of motion over a several-day-long ...
Joughin, IR, Fahnestock, M, Bamber, JL
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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. +3 more
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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 +2 more
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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 +2 more
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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 +4 more
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Subtemperate sliding reduces periodicity of ice stream temporal variability in a simple model
Journal of GlaciologyUnderstanding 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 +3 more
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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. +3 more
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Geophysical Research LettersThe Siple Coast region of West Antarctica is known for its fast flowing, topographically unconstrained ice streams that evolve due to subglacial conditions.
Koi McArthur +2 more
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Quantifying bed roughness beneath contemporary and palaeo-ice streams
Journal of Glaciology, 2018 Bed roughness is an important control on ice-stream location and dynamics. The majority of previous bed roughness studies have been based on data derived from radio-echo sounding (RES) transects across Antarctica and Greenland.
FRANCESCA A.M. FALCINI +3 more
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