Results 1 to 10 of about 1,312,001 (200)
Extensive inland thinning and speed-up of Northeast Greenland Ice Stream [PDF]
Nature, 2022 Over the past two decades, ice loss from the Greenland ice sheet (GrIS) has increased owing to enhanced surface melting and ice discharge to the ocean1–5.
Shfaqat Abbas Khan +2 more
exaly +3 more sources
Accelerating ice flow at the onset of the Northeast Greenland Ice Stream. [PDF]
Nat Commun, 2022 Mass 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
Grinsted A +8 more
europepmc +7 more sources
Stochastic ice stream dynamics. [PDF]
Proc Natl Acad Sci U S A, 2016 Significance Ice streams form the backbone of the flow field of ice sheets. They are known to exhibit a complex spatiotemporal dynamics, which is largely not well understood. Understanding the controls on such dynamics is crucial to sea level change projections as well as to the interpretation of paleorecords.
Mantelli E, Bertagni MB, Ridolfi L.
europepmc +7 more sources
Crystal orientation fabric anisotropy causes directional hardening of the Northeast Greenland Ice Stream. [PDF]
Nat Commun, 2023 This study uses radio-echo sounding measurements, ice-core data and models to map the spatial variation in ice-crystal orientation in the northeast Greenland Ice Stream and shows how it potentially affects the ice-flow dynamics in this region.
Gerber TA +22 more
europepmc +2 more sources
Ice-stream demise dynamically conditioned by trough shape and bed strength. [PDF]
Sci Adv, 2019 We show how the shape and strength of an ice stream’s bed can drive step changes in retreat rate and hasten ice loss to the ocean. Ice sheet mass loss is currently dominated by fast-flowing glaciers (ice streams) terminating in the ocean as ice shelves ...
Bradwell T +12 more
europepmc +2 more sources
Instability of the Northeast Greenland Ice Stream over the last 45,000 years. [PDF]
Nat Commun, 2018 The sensitivity of the Northeast Greenland Ice Stream (NEGIS) to prolonged warm periods is largely unknown and geological records documenting such long-term changes are needed to place current observations in perspective.
Larsen NK +7 more
europepmc +2 more sources
Troughs developed in ice-stream shear margins precondition ice shelves for ocean-driven breakup. [PDF]
Sci Adv, 2019 Fast-flowing ice shelves may form channels under their margins that promote calving and retreat under warming ocean conditions. Floating ice shelves of fast-flowing ice streams are prone to rift initiation and calving originating along zones of rapid ...
Alley KE +3 more
europepmc +2 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 ...
Simon Stephenson, C. S. M. Doake
openalex +4 more sources
, 2020 Ice streams are bands of fast-flowing ice in ice sheets. We investigate their formation as an example of spontaneous pattern formation, based on positive feedbacks between dissipation and basal sliding.
C. Schoof, E. Mantelli
semanticscholar +4 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
A. C. Fowler, Clare Johnson
openalex +3 more sources