Palaeo-ice stream landsystem - AntarcticGlaciers.org
2020年6月22日 · Ribbed moraines are thought to form where ice-flow changes from an extensional (ice streaming) to a compressional regime. Where they lie on top of glacial lineations, therefore, they may record the slowing or shutdown of …
Ice Flow of the Antarctic Ice Sheet | Science - AAAS
We present a reference, comprehensive, high-resolution, digital mosaic of ice motion in Antarctica assembled from multiple satellite interferometric synthetic-aperture radar data acquired during the International Polar Year 2007 to 2009.
Stochastic ice stream dynamics - PNAS
Ice streams are narrow corridors of fast-flowing ice that constitute the arterial drainage network of ice sheets. Therefore, changes in ice stream flow are key to understanding paleoclimate, sea level changes, and rapid disintegration of ice sheets during deglaciation.
Flow variability and ongoing margin shifts on Bindschadler and …
2016年1月28日 · Ice streams on the Ross Sea side of the West Antarctic Ice Sheet are known to experience flow variability on hourly, annual, and multicentury time scales. We report here on observations of flow variability at the decade scale on the Bindschadler and MacAyeal Ice Streams (BIS and MacIS).
Ice streams—fast, and faster? - ScienceDirect
2004年9月1日 · Rapid flow of ice streams is caused either by great thickness, or by effective basal lubrication especially from deforming tills. Competing thermal processes act to stabilize and to destabilize the well-lubricated ice streams, and may contribute to their observed short-term variability yet long-term persistence.
Switch of flow direction in an Antarctic ice stream | Nature
2002年10月3日 · We show that the flow in an area that once discharged into ice stream C has changed direction, now draining into the Whillans ice stream (formerly ice stream B). This switch in flow...
Accelerating ice flow at the onset of the Northeast Greenland Ice Stream
2022年9月23日 · We run four different experiments with an idealized model of a 2D cross section of an ice stream to investigate the surface velocity response to changes in the boundary conditions and...
Speed-up, slowdown, and redirection of ice flow on neighbouring ice …
We use satellite observations to measure the change in ice speed and flow direction on eight ice streams in the Pope, Smith and Kohler region of West Antarctica from 2005 to 2022. Seven ice streams have sped up at the grounding line, with the largest increase in ice speed at Smith West Glacier (87 %) whilst Kohler West Glacier has slowed by 10 %.
TC - Ice-stream flow switching by up-ice propagation of …
Modifications in ice-stream networks have a major impact on ice sheet mass balance and global sea level. Reorganizations in the drainage network of ice streams have been reported in both modern and paleo-ice sheets and usually result in ice …
Ice streams are narrow corridors of fast-flowing ice that constitute the arterial drainage network of ice sheets. Therefore, changes in ice stream flow are key to understanding paleoclimate, sea level changes, and rapid disintegration of ice sheets during deglacia-tion.