Results 41 to 50 of about 1,304,319 (320)
Exceptionally high heat flux needed to sustain the Northeast Greenland Ice Stream
The Cryosphere, 2020 . The Northeast Greenland Ice Stream (NEGIS) currently drains more than 10 % of the Greenland Ice Sheet area and has recently undergone significant dynamic changes.
Silje Smith-Johnsen +4 more
semanticscholar +1 more source
A thicker Antarctic ice stream during the mid-Pliocene warm period
Communications Earth & Environment, 2023 Ice streams regulate most ice mass loss in Antarctica. Determining ice stream response to warmer conditions during the Pliocene could provide insights into their future behaviour, but this is hindered by a poor representation of subglacial topography in ...
Martim Mas e Braga +12 more
doaj +1 more source
Sensitivity of the Northeast Greenland Ice Stream to Geothermal Heat
Journal of Geophysical Research: Earth Surface, 2020 Recent observations of ice flow surface velocities have helped improve our understanding of basal processes on Greenland and Antarctica, though these processes still constitute some of the largest uncertainties driving ice flow change today.
Silje Smith-Johnsen +3 more
semanticscholar +1 more source
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
Formation of ribbed bedforms below shear margins and lobes of palaeo-ice streams [PDF]
The Cryosphere, 2021 Conceptual ice stream land systems derived from geomorphological and sedimentological observations provide constraints on ice–meltwater–till–bedrock interactions on palaeo-ice stream beds. Within these land systems, the spatial distribution and formation
J. Vérité +9 more
doaj +1 more source
Bed topography and subglacial landforms in the onset region of the Northeast Greenland Ice Stream
Annals of Glaciology, 2020 The Northeast Greenland Ice Stream (NEGIS) is an important dynamic component for the total mass balance of the Greenland ice sheet, as it reaches up to the central divide and drains 12% of the ice sheet.
S. Franke +7 more
semanticscholar +1 more source
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
Journal of Geophysical Research: Earth Surface, 2020 The ice stream geometry and large ice surface velocities at the onset region of the Northeast Greenland Ice Stream (NEGIS) are not yet well reproduced by ice sheet models.
S. Franke +6 more
semanticscholar +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
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