Results 21 to 30 of about 832 (174)
Modeling the spatially distributed nature of subglacial sediment transport and erosion [PDF]
Earth Surface Dynamics, 2023 Abstract. Glaciers expel sediment as they melt, in addition to ice and water. As a result, changing glacier dynamics and melt produce changes to glacier erosion and sediment discharge, which can impact the landscape surrounding retreating glaciers, as well as communities and ecosystems downstream.
I. Delaney +3 more
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Debris-bed friction during glacier sliding with ice–bed separation
Annals of Glaciology, 2019 Theory and experiments indicate that ice–bed separation during glacier slip over 2-D hard beds causes basal shear stress to reach a maximum at a particular slip velocity and decrease at higher velocities.
Neal R. Iverson +2 more
doaj +1 more source
Annals of Glaciology, 2021 The Subglacial Antarctic Lakes Scientific Access (SALSA) Project accessed Mercer Subglacial Lake using environmentally clean hot-water drilling to examine interactions among ice, water, sediment, rock, microbes and carbon reservoirs within the lake water
John C. Priscu +36 more
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Prospects of obtaining samples of bottom sediments from subglacial lake Vostok
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
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Subglacial landforms beneath Rutford Ice Stream, Antarctica: detailed bed topography from ice-penetrating radar [PDF]
Earth System Science Data, 2016 We present a digital elevation model of the bed of Rutford Ice Stream, Antarctica, derived from radio-echo sounding data. The data cover an 18 × 40 km area immediately upstream of the grounding line of the ice stream.
E. C. King, H. D. Pritchard, A. M. Smith
doaj +1 more source
The mechanics of subglacial sediment: an example of new “transitional” behaviour [PDF]
Canadian Geotechnical Journal, 2010 A series of isotropic compression tests and drained and undrained triaxial compression tests have been performed on glacial sediment from Iceland. Langjökull sediment, which is well graded, is thought to have reached a critical grading during deposition and transportation.
Altuhafi, F, Baudet, BA, Sammonds, P
openaire +3 more sources
Fundamental Research, 2021 High Mountain Asia glaciers are currently ignored in the estimation of global greenhouse gas budgets (e.g., methane (CH4) and carbon dioxide (CO2)). Similar to the Asian Water Tower and Third Pole, the Tibetan Plateau (TP) hosts the largest volume of ...
Yulan Zhang +5 more
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Bed-type variability and till (dis)continuity beneath Thwaites Glacier, West Antarctica
Annals of Glaciology, 2019 Recent seismic measurements from upper Thwaites Glacier indicate that the bed-type variability is closely related to the along-flow basal topography. In high-relief subglacial highlands, stoss sides of topographic highs have a relatively higher acoustic ...
Atsuhiro Muto +3 more
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Journal of Glaciology, 2023 This study presents the first light detection and ranging (LiDAR)-based morphometric description of a water blister from a past ice-sheet bed caused by rapid supraglacial drainage.
Joni Mäkinen +6 more
doaj +1 more source
Annals of Glaciology, 2019 Late Holocene sediment deposits in Pine Island Bay, West Antarctica, are hypothesized to be linked to intensive meltwater drainage during the retreat of the paleo-Pine Island Ice Stream after the Last Glacial Maximum. The uppermost sediment units show an
Dustin M. Schroeder +3 more
doaj +1 more source