Results 11 to 20 of about 1,205,418 (128)

Clean subglacial access: prospects for future deep hot-water drilling [PDF]

, 2015
Accessing and sampling subglacial environments deep beneath the Antarctic Ice Sheet presents several challenges to existing drilling technologies. With over half of the ice sheet believed to be resting on a wet bed, drilling down to this environment must
Smith, Andrew, Tranter, Martyn, Smith, Andrew M, Mowlem, M., Ross, N., Hodgson, Dominic A., Ross, N, Parnell, J, Rose, Mike, Mowlem, Matt, Bentley, Michael J., Siegert, MJ, Parnell, John, Mowlem, Matthew, Pearce, D., Hodgson, D.A., Siegert, M.J., Siegert, Martin J., Bentley, M.J., Tranter, M., Tranter, M, Rose, M, Smith, A.M., Ross, Neil, Smith, Andrew M., Makinson, K, Hodgson, DA, Makinson, Keith, Bentley, Michael, Hodgson, Dominic, Mowlem, M, Rose, M., Pearce, David, Pearce, D, Makinson, K., Siegert, Martin, Smith, AM, Parnell, J., Bentley, MJ   +38 more
core   +1 more source

Subglacial Lake Ellsworth: a candidate for in situ exploration in West Antarctica [PDF]

, 2004
Radio-echo sounding reveals a 10 km-long lake beneath similar to3.4 km of ice near the Ellsworth Mountains in West Antarctica, 20 km from the ice divide. Subglacial Lake Ellsworth is located within a distinct topographic hollow, which is similar to1.5 km
Corr, H., Woodward, J., Payne, AJ, Joughin, I., King, Edward, Smith, Andrew, Siegert, MJ, King, E. C., Smith, A., Siegert, Martin J., Woodward, J, Hindmarsh, RCA, Corr, Hugh, Woodward, John, King, E, Payne, Antony J., Corr, H, King, Edward C., Payne, A. J., Hindmarsh, Richard, Joughin, Ian, Siegert, Martin, Siegert, M. J., Joughin, I, Smith, Andy, Smith, AM, Hindmarsh, R.   +26 more
core   +1 more source

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, Richard B. Alley, Byron R. Parizek, Sridhar Anandakrishnan   +3 more
doaj   +1 more source

Potential subglacial lake locations and meltwater drainage pathways beneath the Antarctic and Greenland ice sheets [PDF]

, 2013
We use the Shreve hydraulic potential equation as a simplified approach to investigate potential subglacial lake locations and meltwater drainage pathways beneath the Antarctic and Greenland ice sheets. We validate the method by demonstrating its ability
Clark, Chris, Woodward, J., Livingstone, Stephen, Woodward, John, Clark, C.D., Kingslake, J., Livingstone, S.J., Livingstone, S. J., Clark, C. D., J. Kingslake, Kingslake, Jonathan, C. D. Clark, S. J. Livingstone, J. Woodward   +13 more
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The feasibility of imaging subglacial hydrology beneath ice streams with ground-based electromagnetics

Journal of Glaciology, 2017
Subglacial hydrologic systems in Antarctica and Greenland play a fundamental role in ice-sheet dynamics, yet critical aspects of these systems remain poorly understood due to a lack of observations.
KERRY KEY, MATTHEW R. SIEGFRIED
doaj   +1 more source

Penetration of Antarctic subglacial lakes by VHF electromagnetic pulses: Information on the depth and electrical conductivity of basal water bodies [PDF]

, 1999
Owing to the high level of absorption of very high frequency radio waves in water, previous investigators of airborne radio echo sounding (RES) data from Antarctica have assumed that the depth of subglacial lakes cannot be measured directly by this ...
Martin J. Siegert, Siegert, M. J., Michael R. Gorman, Gorman, M. R.   +3 more
core   +1 more source

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., Charles Cockell, Cockell, Charles S., Charles S. Cockell, Michael Thorne, Cockell, Charles, Gavin Burns, Hodgson, Dominic A., Michael A. S. Thorne, Burns, Gavin, Hodgson, Dominic, Pearce, David, Pearce, David A., David Pearce, David A. Pearce, Dominic A. Hodgson, Thorne, Michael, Dominic Hodgson   +17 more
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A revised inventory of Antarctic subglacial lakes [PDF]

, 2005
The locations and details of 145 Antarctic subglacial lakes are presented. The inventory is based on a former catalogue of lake-type features, which has been subsequently reanalysed, and on the results from three additional datasets.
Tobacco, Ignazio, Blankenship, Donald D., S. Popov, Carter, Sasha, Siegert, Martin, M. J. Siegert, Popov, Sergey, S. Carter, D. D. Blankenship, I. Tabacco   +9 more
core   +1 more source

Will subglacial rhyolite eruptions be explosive or intrusive? Some insights from analytical models. [PDF]

, 2007
Simple analytical models of subglacial eruptions are presented, which simulate evolving subglacial cavities and volcanic edifices during rhyolitic eruptions beneath temperate glaciers.
Gilbert, Jennie S., Tuffen, Hugh, McGarvie, D. W.   +2 more
core   +5 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.
Tuffen, H., Gilbert, J. S., McGarvie, D. W.   +2 more
core   +5 more sources