Results 181 to 190 of about 5,522 (216)

Modelling Subglacial Hydrology under Future Climate Scenarios in Wilkes Subglacial Basin, Antarctica

2022
<p>The Greenland and Antarctic ice sheets have differing climates, which makes surface melt a significant hydrological source in Greenland but not currently in Antarctica. Due to changing climate and warming air temperatures, Antarctica is predicted to experience more surface meltwater in the future.
Kevin Siu, Christine Dow, Mathieu Morlighem, Felicity McCormack, Tim Hill   +4 more
openaire   +1 more source

Modeling the Influence of Moulin Shape on Subglacial Hydrology

Journal of Geophysical Research: Earth Surface, 2022
AbstractSubglacial models represent moulins as cylinders or cones, but field observations suggest that the upper part of moulins in the Greenland Ice Sheet has more complex shapes. These more complex shapes should cause englacial water storage within moulins to vary as a function of depth, a relationship not currently accounted for in models.
Celia Trunz, Matthew D. Covington, Kristin Poinar, Lauren C. Andrews, Jessica Mejia, Jason Gulley   +5 more
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Totten Glacier subglacial hydrology determined from geophysics and modeling

Earth and Planetary Science Letters, 2020
Aurora Subglacial Basin (ASB), which feeds Totten Glacier, is a marine basin lying below sea level and contains up to 3.5m of global sea level equivalent. Rates of future sea level rise from this area are primarily dependent on the stability of Totten Ice Shelf and the controls on ice flow dynamics upstream of the grounding line, both of which may be ...
C.F. Dow, F.S. McCormack, D.A. Young, J.S. Greenbaum, J.L. Roberts, D.D. Blankenship   +5 more
openaire   +1 more source

Validation of effective subglacial hydrology models

The presence of subglacial lubrication networks at the ice-bed interface is a key component for ice sheet dynamics. A subglacial network has the potential to facilitate rapid ice flow through reduction in basal friction, possibly resulting in the formation of surges and ice streams.
Jeremie Schmiedel, Angelika Humbert, Thomas Kleiner, Roiy Sayag   +3 more
openaire   +1 more source

Glacier hydrology and the potential for subglacial karstification

Norsk Geografisk Tidsskrift - Norwegian Journal of Geography, 1984
Contemporary models of subglacial hydrology identify two quasi-independent hydrologic systems at the bed of temperate alpine glaciers: a dendritic, low pressure conduit network and a more extensive, high pressure regelation film. Observations in Castleguard Cave beneath the Columbia Icefield suggest that this distinction continues into the groundwater ...
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A numerical study of hydrologically driven glacier dynamics and subglacial flooding

Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences, 2010
A hydrologically coupled flowband model of ‘higher order’ ice dynamics is used to explore perturbations in response to supraglacial water drainage and subglacial flooding. The subglacial drainage system includes interacting ‘fast’ and ‘slow’ drainage elements. The fast drainage system is assumed to be composed of ice-walled conduits and the slow system
Pimentel, Sam, Flowers, Gwenn E.
openaire   +2 more sources

Investigating Antarctic subglacial hydrologic processes from marine sediment cores

2023
Understanding processes operating beneath glacial ice is imperative for holistic knowledge of glaciated regions and for accurately projecting future behavior of and sea-level contributions from the Antarctic Ice Sheet. Evolution of subglacial hydrologic networks is one such process where knowledge gaps persist, in large part because of the challenges ...
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Constraining subglacial hydrology with ice surface velocity observations by solving an inverse ice dynamics-subglacial hydrology problem.

Proposed for presentation at the AGU21 held December 13-17, 2021 in ,, 2021
Luca Bertagna, Mauro Perego, Matthew Hoffman   +2 more
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Subglacial meltwater corridors and their relationship to the soft-bed subglacial hydrological continuum

The subglacial environment is a key part of glacier dynamics, and the ‘slipperiness’ of the bed has shown to be related to the rate of sea level rise. Investigations of the subglacial hydrological system associated with soft beds are rare.
Jane Hart, Kirk Martinez, Nathaniel Baurley, Benjamin Robson, Amelia Andrews   +4 more
openaire   +1 more source

Subglacial hydrology and sediment transport at Bondhusbreen, southwest Norway

Geological Society of America Bulletin, 1985
Tunnels driven, in rock under the glacier Bondhusbreen in Norway, and thence upward to the ice-rock interface, provide a rare opportunity to study a subglacial drainage system. Early in the melt season, suspended sediment discharges in the subglacial water channels are large, and channels apparently change position.
ROGER LeB. HOOKE, BJØRN WOLD, JON OVE HAGEN   +2 more
openaire   +1 more source