Evolution of subglacial overdeepenings in response to sediment redistribution and glaciohydraulic supercooling [PDF]
Journal of Geophysical Research: Earth Surface, 2013 AbstractGlaciers erode bedrock rapidly, but evacuation of sediments requires efficient subglacial drainage networks. If glaciers erode more rapidly than evacuation proceeds, a protective subglacial till layer can form to armor the bed. Where glaciers cross overdeepenings, local closed depressions, the bed slope opposes the ice surface and lowers the ...
Creyts, Timothy T. +2 more
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Prospects of obtaining samples of bottom sediments from subglacial lake Vostok [PDF]
Записки Горного института, 2017 The paper proves the timeliness of obtaining and examining bottom sediments from subglacial Lake Vostok. Predictive geological section of Lake Vostok and information value of bottom sediments have been examined.
N. I. Vasil'ev +2 more
doaj +3 more sources
The "tipping" temperature within Subglacial Lake Ellsworth, West Antarctica and its implications for lake access [PDF]
The Cryosphere, 2011 We present results from new geophysical data allowing modelling of the water flow within Subglacial Lake Ellsworth (SLE), West Antarctica. Our simulations indicate that this lake has a novel temperature distribution due to significantly thinner ice than ...
M. Thoma +5 more
doaj +4 more sources
A new percussion hammer mechanism for a borehole deployable subglacial sediment corer [PDF]
Annals of Glaciology, 2021 Subglacial sediments have the potential to reveal information about the controls on glacier flow, changes in ice-sheet history and characterise life in those environments.
Keith Makinson +6 more
doaj +3 more sources
Eurasian ice-sheet dynamics and sensitivity to subglacial hydrology [PDF]
Journal of Glaciology, 2017 Ice-stream dynamics are strongly controlled by processes taking place at the ice/bed interface where subglacial water both lubricates the base and saturates any existing, underlying sediment. Large parts of the former Eurasian ice sheet were underlain by
EYTHOR GUDLAUGSSON +5 more
doaj +3 more sources
Coarse Sediment Transport in a Near‐Terminus Subglacial Channel
Geophysical Research Letters, Volume 53, Issue 13, 16 July 2026.Abstract We present the first large‐sample, spatially resolved measurements of coarse sediment transport within a subglacial meltwater channel. We released 324 radio‐tagged pebbles into a near‐terminus channel of Glacier d’Otemma, Switzerland, and monitored their positions through 10–50 m of ice during the mid to late melt season.
Matt Jenkin +5 more
wiley +2 more sources
Ploughing of subglacial sediment [PDF]
Journal of Glaciology, 1994 Abstract Mechanical conditions at the base of Trapridge Glacier, Yukon Territory, were investigated using a “ploughmeter”. We describe the physical characteristics and the theory of this new instrument as well as its operation.
URS H. Fischer, Garry K. C. Clarke
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Geophysical Monograph Series, Page 117-131., 2021 Exploring the links between Large Igneous Provinces and dramatic environmental impact
An emerging consensus suggests that Large Igneous Provinces (LIPs) and Silicic LIPs (SLIPs) are a significant driver of dramatic global environmental and biological changes, including mass extinctions.
Benjamin Black +4 more
wiley +1 more source
Subglacial Sediment Plumes in Greenland
, 2022 This is a data dump of the output from the Bachelor of Science Senior Thesis "Subglacial Sediment Plumes in Greenland" ( https://scholarsphere.psu.edu/resources/1315c9d5-83bf-4c53-a502-766d63f56e70)
John P Dibert, Dr. Ken Mankoff
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A Numerical Model for Fluvial Transport of Subglacial Sediment [PDF]
Journal of Geophysical Research: Earth Surface, 2019 Sediment discharge from glaciers impacts downstream aquatic habitats, hydropower operations, and river infrastructure. Since discharge of subglacial sediment will evolve in response to glacier retreat, estimating future subglacial sediment dynamics is of great relevance.
Ian Delaney +2 more
openaire +3 more sources