Results 41 to 50 of about 713 (170)

Modeling Antarctic subglacial lake filling and drainage cycles [PDF]

The Cryosphere, 2016
The growth and drainage of active subglacial lakes in Antarctica has previously been inferred from analysis of ice surface altimetry data. We use a subglacial hydrology model applied to a synthetic Antarctic ice stream to examine internal controls on the
C. F. Dow, M. A. Werder, S. Nowicki, R. T. Walker   +3 more
doaj   +1 more source

Analysis of long-term dynamic changes of subglacial lakes in the Recovery Ice Stream, Antarctica [PDF]

The Cryosphere
The dynamic activity of subglacial lakes plays a crucial role in modulating glacial processes and the mass balance of the Antarctic ice sheet. The Recovery Ice Stream (RIS), projected to experience significant mass loss in East Antarctica during coming ...
T. Feng, T. Feng, H. Dong, H. Dong, Y. Chen, Y. Chen, T. Hao, T. Hao   +7 more
doaj   +1 more source

Evidence of active subglacial lakes under a slowly moving coastal region of the Antarctic Ice Sheet [PDF]

The Cryosphere
Active subglacial lakes beneath the Antarctic Ice Sheet provide insights into the dynamic subglacial environment, with implications for ice-sheet dynamics and mass balance.
J. F. Arthur, C. Shackleton, G. Moholdt, K. Matsuoka, J. van Oostveen   +4 more
doaj   +1 more source

Drainage networks, lakes and water fluxes beneath the Antarctic ice sheet

Annals of Glaciology, 2016
Antarctica Bedmap2 datasets are used to calculate subglacial hydraulic potential and the area, depth and volume of hydraulic potential sinks. There are over 32 000 contiguous sinks, which can be thought of as predicted lakes.
Ian C. Willis, Ed L. Pope, Gwendolyn J.-M.C. Leysinger Vieli, Neil S. Arnold, Sylvan Long   +4 more
doaj   +1 more source

The influence of a model subglacial lake on ice dynamics and internal layering [PDF]

The Cryosphere, 2016
As ice flows over a subglacial lake, the drop in bed resistance leads to an increase in ice velocities and a draw down of isochrones and cold ice. The ice surface flattens as it adjusts to the lack of resisting forces at the base. The rapid transition in
E. Gudlaugsson, A. Humbert, T. Kleiner, J. Kohler, K. Andreassen   +4 more
doaj   +1 more source

Clean access, measurement, and sampling of Ellsworth Subglacial Lake: A method for exploring deep Antarctic subglacial lake environments [PDF]

Reviews of Geophysics, 2012
Antarctic subglacial lakes are thought to be extreme habitats for microbial life and may contain important records of ice sheet history and climate change within their lake floor sediments. To find whether or not this is true, and to answer the science questions that would follow, direct measurement and sampling of these environments are required. Ever
Siegert, Martin J., Clarke, Rachel J., Mowlem, Matt, Ross, Neil, Hill, Christopher S., Tait, Andrew, Hodgson, Dominic, Parnell, John, Tranter, Martyn, Pearce, David, Bentley, Michael J., Cockell, Charles, Tsaloglou, Maria-Nefeli, Smith, Andy, Woodward, John, Brito, Mario P., Waugh, Ed   +16 more
openaire   +4 more sources

The Glacial Legacy of the Geneva Basin: Morphology and implications of an intricate tunnel valley system revealed from 3D seismic data

Journal of Quaternary Science, EarlyView.
ABSTRACT Like other perialpine basins and glaciated margins, the Geneva Basin in SW Switzerland is characterised by buried tunnel valleys, which are elongated incisions widely attributed to subglacial meltwater erosion beneath continental ice sheets. However, an inclusive understanding of the geological control on the evolution of the glacial landscape
Ovie Emmanuel Eruteya, Emna Meftah, Andrea Moscariello   +2 more
wiley   +1 more source

NEW FRONTIERS OF ANTARCTIC SUBGLACIAL LAKES EXPLORATION

Geography, Environment, Sustainability, 2013
Antarctic subglacial aquatic environment have become of great interest to the science community because they may provide unique information about microbial evolution, the past climate of the Earth, and the formation of the Antarctic ice sheet.
Pavel Talalay, Alexey Markov, Mikhail Sysoev   +2 more
doaj   +1 more source

A balanced water layer concept for subglacial hydrology in large-scale ice sheet models [PDF]

The Cryosphere, 2013
There is currently no doubt about the existence of a widespread hydrological network under the Antarctic Ice Sheet, which lubricates the ice base and thus leads to increased ice velocities.
S. Goeller, M. Thoma, K. Grosfeld, H. Miller   +3 more
doaj   +1 more source

Hydraulic reconstruction of catastrophic drainage from the Late Glacial, Lake Fraser, British Columbia, Canada

Journal of Quaternary Science, EarlyView.
ABSTRACT Glacial Lake Fraser, which formed in British Columbia against the retreating Cordilleran Ice Sheet, stored ~520 km3 of water before its near‐total drainage into the Salish Sea during an outburst flood event. Despite the impact of the outburst flood on sediment transport and landscape evolution in the Fraser River valley, its peak discharge and
Sean M. Loeffler, John J. Clague, Brendan G. N. Miller, Sophie L. Norris   +3 more
wiley   +1 more source