Results 1 to 10 of about 5,150,866 (206)

Estimating effective pressures in active subglacial lakes with ICESat-2 satellite altimetry [PDF]

Journal of Glaciology
The difference between the ice and water pressures, or the effective pressure, influences water flow and sliding at the ice-bed interface. Effective pressure is typically quantified with subglacial hydrology models because direct measurements of the ...
Aaron Stubblefield, Aleah Nicholson Sommers, Colin Meyer, Lauren Cristy Andrews   +3 more
doaj   +2 more sources

Seasonal velocity patterns provide insights for the soft-bed subglacial hydrology continuum [PDF]

Communications Earth & Environment
Subglacial hydrology plays an important role in controlling glacier behaviour, influencing glacier retreat and the resulting contributions to sea level rise.
Jane K. Hart, Nathaniel R. Baurley, Amy Bonnie, Benjamin A. Robson, Graeme Bragg, Kirk Martinez   +5 more
doaj   +2 more sources

Different geomorphic processes control suspended sediment and bedload export from glaciers [PDF]

Nature Communications
Ongoing cryospheric change has modified sediment export from glacierized catchments substantially, with significant implications for ecosystems and downstream users, notably hydropower companies.
Ian Delaney, Frédéric Lardet, Matt Jenkin, Davide Mancini, Stuart N. Lane   +4 more
doaj   +2 more sources

On the factors and the degree of their effect on subglacial melt and changes in the state of Antarctic subglacial lakes

Arctic, Antarctic, and Alpine Research
This study presents the results of mathematical modeling of the degree of effects of various characteristics on basal conditions in Antarctica. The model is based on the numerical solution of the one-dimensional Stefan problem.
Alina Boronina, Sergey Popov, Gang Qiao
doaj   +3 more sources

Differential impact of isolated topographic bumps on ice sheet flow and subglacial processes [PDF]

The Cryosphere, 2023
Topographic highs (“bumps”) across glaciated landscapes have the potential to temporarily slow ice sheet flow or, conversely, accelerate ice flow through subglacial strain heating and meltwater production.
M. A. McKenzie, L. E. Miller, J. S. Slawson, J. S. Slawson, E. J. MacKie, S. Wang   +5 more
doaj   +1 more source

Subglacial meltwater routes of the Fennoscandian Ice Sheet

Journal of Maps, 2022
Subglacial drainage systems are crucial elements of glaciers and ice sheets because they modulate ice flow velocity. However, logistical challenges of measuring subglacial processes beneath contemporary ice and natural limitations in long-term monitoring
Nico Dewald, Stephen J. Livingstone, Chris D. Clark   +2 more
doaj   +1 more source

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, Margaux Hofmann, Bryn Hubbard, Davide Mancini, Floreana M. Miesen, Frédéric Herman, Stuart N. Lane   +6 more
doaj   +1 more source

Drainage and refill of an Antarctic Peninsula subglacial lake reveal an active subglacial hydrological network [PDF]

The Cryosphere, 2022
The presence of subglacial lakes and subglacial hydrological networks under the East and West Antarctic ice sheets is now relatively well understood, whilst their influence on ice dynamics is the subject of ongoing research.
D. A. Hodgson, T. A. Jordan, N. Ross, T. R. Riley, P. T. Fretwell   +4 more
doaj   +1 more source

Constraints on subglacial melt fluxes from observations of active subglacial lake recharge

Journal of Glaciology, 2023
Active subglacial lakes provide a rare glimpse of the subglacial environment and hydrological processes at play. Several studies contributed to establishing active subglacial lake inventories and document lake drainage and connection, but few focused on ...
George Malczyk, Noel Gourmelen, Mauro Werder, Martin Wearing, Dan Goldberg   +4 more
doaj   +1 more source

Drag forces at the ice-sheet bed and resistance of hard-rock obstacles: the physics of glacial ripping

Journal of Glaciology, 2023
Glacial ripping involves glaciotectonic disintegration of rock hills and extensive removal of rock at the ice-sheet bed, triggered by hydraulic jacking caused by fluctuating water pressures.
Maarten Krabbendam, Fabio Dioguardi, Christian Arnhardt, Sam Roberson, Adrian M. Hall   +4 more
doaj   +1 more source