Results 21 to 30 of about 2,018 (207)
Tracking coarse sediment in an Alpine subglacial channel using radio-tagged particles
Journal of Glaciology, 2023 We present a method for tracking radio-tagged pebbles and cobbles through subglacial meltwater channels under shallow temperate glaciers. Natural particles tagged with active radio transmitters were injected directly into a large subglacial channel 300 m
Matt Jenkin +6 more
doaj +1 more source
Journal of Glaciology, 2021 The recently-advancing Taku Glacier is excavating subglacial sediments at high rates over multi-decadal timescales. However, sediment redistribution over shorter timescales remains unquantified.
Jenna M. Zechmann +4 more
doaj +1 more source
Biogeochemical contents of subglacial sediments exposed by glacier retreat in the Arctic. [PDF]
, 2021 Uploaded data provide biogeochemical contents of subglacial sediments collected from melting fronts of Arctic glaciers. These sediments are critical to an early stage of soil development and ecological succession of proglacial lands.
Petra Vinsova
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Discrete element modeling of subglacial sediment deformation [PDF]
JOURNAL OF GEOPHYSICAL RESEARCH-EARTH SURFACE, 2013 The Discrete Element Method (DEM) is used in this study to explore the highly nonlinear dynamics of a granular bed when exposed to stress conditions comparable to those at the bed of warm-based glaciers. Complementary to analog experiments, the numerical approach allows a detailed analysis of the material dynamics and the shear zone development during ...
Damsgaard, Anders +5 more
+7 more sources
Sediment oxygen consumption in
Limnology and Oceanography, 2023 AbstractOxygen consumption in aquatic sediments is an indicator of overall biological activity of the ecosystem. As such, rates of sedimentary oxygen utilization are well documented for much of the open oceans and freshwater lakes. However, there are few direct measurements of sedimentary oxygen consumption from Antarctic subglacial aquatic sediments ...
Alexander B. Michaud, John C. Priscu
openaire +2 more sources
Products of an effusive subglacial rhyolite eruption: Blahnukur, Torfajokull, Iceland. [PDF]
, 2001 . We present field observations from Blahnukur, a small volume (400 m thick. Lithofacies associations attest to complex patterns of volcano-ice interaction.
Dave McGarvie +8 more
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Preliminary analysis of life within a former subglacial lake sediment in Antarctica [PDF]
, 2013 Since the first descriptions of Antarctic subglacial lakes, there has been a growing interest and awareness of the possibility that life will exist and potentially thrive in these unique and little known environments. The unusual combination of selection
Thorne, Michael A. S. +17 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
doaj +1 more source
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
openaire +3 more sources