Results 21 to 30 of about 200,024 (256)
Of isbræ and ice streams [PDF]
Annals of Glaciology, 2003 AbstractFast-flowing ice streams and outlet glaciers provide the major avenues for ice flow from past and present ice sheets. These ice streams move faster than the surrounding ice sheet by a factor of 100 or more. Several mechanisms for fast ice-stream flow have been identified, leading to a spectrum of different ice-stream types.
Martin Truffer, Keith A. Echelmeyer
openaire +2 more sources
Palaeo-ice streams: an introduction [PDF]
Boreas, 2003 [FIRST PARAGRAPH] Ice streams are narrow fast-flowing zones within ice sheets, and in the case of Antarctica are responsible for draining up to 90% of the mass from the ice sheet. It has been shown that Quaternary ice sheets were profoundly, and arguably catastrophically, influenced by the operation of transitory ice streaming.
Clark, C.D. +2 more
openaire +3 more sources
A new approach to inferring basal drag and ice rheology in ice streams, with applications to West Antarctic Ice Streams [PDF]
Journal of Glaciology, 2020 AbstractDrag at the bed and along the lateral margins are the primary forces resisting flow in outlet glaciers. Simultaneously inferring these parameters is challenging since basal drag and ice viscosity are coupled in the momentum balance, which governs ice flow.
Meghana Ranganathan +3 more
openaire +6 more sources
How dynamic are ice-stream beds? [PDF]
The Cryosphere, 2017 Abstract. Projections of sea-level rise contributions from West Antarctica's dynamically thinning ice streams contain high uncertainty because some of the key processes involved are extremely challenging to observe. An especially poorly observed parameter is sub-decadal stability of ice-stream beds, which may be important for subglacial traction, till ...
Damon Davies +8 more
openaire +8 more sources
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
openaire +2 more sources
Ice-sheet surging and ice-stream formation [PDF]
Annals of Glaciology, 1996 A simplified model of ice-sheet behaviour is described. It combines the assumptions of rapid ice flow, high viscous activation energy and realistic sediment-based sliding dynamics to form a non-linear diffusion-type equation which can display relaxation oscillations analogous to those of surging glaciers, and which may be relevant to large-scale surges
C. Johnson, Andrew C. Fowler
openaire +2 more sources
Accelerating ice flow at the onset of the Northeast Greenland Ice Stream [PDF]
Nature Communications, 2022 AbstractMass loss near the ice-sheet margin is evident from remote sensing as frontal retreat and increases in ice velocities. Velocities in the ice sheet interior are orders of magnitude smaller, making it challenging to detect velocity change. Here, we analyze a 35-year record of remotely sensed velocities, and a 6-year record of repeated GPS ...
Aslak Grinsted +8 more
openaire +4 more sources
Dynamic behaviour of rutford ice stream [PDF]
Annals of Glaciology, 1982 The grounding-line region of Rutford Ice Stream was surveyed from the ground during 1978–79 and 1979–80, and from the air in 1980–81. Maps of surface elevation and ice thickness of an area of 1 000 km2allow the grounding line to be delineated and show that the ice stream consists of several distinct fingers of thick ice trending parallel to the flow ...
Stephenson, S.N, Doake, C.S.M
openaire +3 more sources
Contrasting the modelled sensitivity of the Amundsen Sea Embayment ice streams [PDF]
, 2016 Present-day mass loss from the West Antarctic ice sheet is centred on the Amundsen Sea Embayment (ASE), primarily through ice streams, including Pine Island, Thwaites and Smith glaciers.
ANTONY J. PAYNE +3 more
core +3 more sources
Holocene ice-stream shutdown and drainage basin reconfiguration in northeast Greenland [PDF]
, 2022 Reliable knowledge of ice discharge dynamics for the Greenland ice sheet via its ice streams is essential if we are to understand its stability under future climate scenarios.
Binder, Tobias +11 more
core +1 more source