Tidal influence on Rutford Ice Stream, West Antarctica: observations of surface flow and basal processes from closely-spaced GPS and passive seismic stations [PDF]
, 2008 High-resolution surface velocity measurements and passive seismic observations from Rutford Ice Stream, West Antarctica, 40 km upstream from the grounding line are presented.
A.E. Behar +11 more
core +2 more sources
Annals of Glaciology, 2020 Numerical ice-sheet models are commonly matched to surface ice velocities from InSAR measurements by modifying basal drag, allowing the flow and form of the ice sheet to be simulated. Geophysical measurements of the bed are rarely used to examine if this
Hafeez Jeofry +2 more
doaj +1 more source
Ice flow dynamics of the northwestern Laurentide Ice Sheet during the last deglaciation [PDF]
The CryosphereReconstructions of palaeo-ice-stream activity provide insight into the processes governing ice stream evolution over millennial timescales. The northwestern sector of the Laurentide Ice Sheet experienced a period of rapid retreat driven by warming during
B. J. Stoker +11 more
doaj +1 more source
Flow and retreat of the Late Quaternary Pine Island-Thwaites palaeo-ice stream, West Antarctica [PDF]
, 2010 Multibeam swath bathymetry and sub-bottom profiler data are used to establish constraints on the flow and retreat history of a major palaeo-ice stream that carried the combined discharge from the parts of the West Antarctic Ice Sheet now occupied by the ...
Alastair G. C. Graham +71 more
core +1 more source
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
The role of subglacial hydrology in ice streams with elevated geothermal heat flux
Journal of Glaciology, 2020 The spatial distribution of geothermal heat flux (GHF) under ice sheets is largely unknown. Nonetheless, it is an important boundary condition in ice-sheet models, and suggested to control part of the complex surface velocity patterns observed in some ...
Silje Smith-Johnsen +2 more
doaj +1 more source
Marine ice sheet instability and ice shelf buttressing of the Minch Ice Stream, northwest Scotland [PDF]
The Cryosphere, 2018 Uncertainties in future sea level projections are dominated by our limited understanding of the dynamical processes that control instabilities of marine ice sheets. The last deglaciation of the British–Irish Ice Sheet offers a valuable example to examine
N. Gandy +7 more
doaj +1 more source
Initial results from geophysical surveys and shallow coring of the Northeast Greenland Ice Stream (NEGIS) [PDF]
The Cryosphere, 2014 The Northeast Greenland Ice Stream (NEGIS) is the sole interior Greenlandic ice stream. Fast flow initiates near the summit dome, and the ice stream terminates approximately 1000 km downstream in three large outlet glaciers that calve into the Greenland ...
P. Vallelonga +22 more
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 ...
Fogwill, C. J. +5 more
core +1 more source
Scientific Reports, 2018 The Barents Sea Ice Sheet was a marine-based ice sheet, i.e., it rested on the Barents Sea floor during the Last Glacial Maximum (21 ky BP). The Bjørnøyrenna Ice Stream was the largest ice stream draining the Barents Sea Ice Sheet and is regarded as an ...
Michele Petrini +9 more
doaj +1 more source