Results 21 to 30 of about 401,804 (204)
Upstream flow effects revealed in the EastGRIP ice core using Monte Carlo inversion of a two-dimensional ice-flow model [PDF]
The Cryosphere, 2021 The Northeast Greenland Ice Stream (NEGIS) is the largest active ice stream on the Greenland Ice Sheet (GrIS) and a crucial contributor to the ice-sheet mass balance.
T. A. Gerber +8 more
doaj +1 more source
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
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
Englacial Pore Water Localizes Shear in Temperate Ice Stream Margins [PDF]
, 2019 The margins of fast‐moving ice streams are characterized by steep velocity gradients. Some of these gradients cannot be explained by a temperature‐dependent viscosity alone.
Haseloff, Marianne +2 more
core +2 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
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
Nature Communications, 2023 The dynamic mass loss of ice sheets constitutes one of the biggest uncertainties in projections of ice-sheet evolution. One central, understudied aspect of ice flow is how the bulk orientation of the crystal orientation fabric translates to the ...
Tamara Annina Gerber +22 more
doaj +1 more source
Journal of Glaciology, 2023 Surging and streaming of glaciers are modulated by meltwater availability and pressure which controls mechanical coupling at their beds. Using laboratory-scale experimental modelling and palaeoglaciological mapping, we explore how subglacial drainage ...
Édouard Ravier +3 more
doaj +1 more source