Results 41 to 50 of about 2,943 (230)

Water blister geomorphology and subglacial drainage sediments: an example from the bed of the Fennoscandian Ice Sheet in SW Finland

Journal of Glaciology, 2023
This study presents the first light detection and ranging (LiDAR)-based morphometric description of a water blister from a past ice-sheet bed caused by rapid supraglacial drainage.
Joni Mäkinen, Christine F. Dow, Elina Ahokangas, Antti Ojala, Kari Kajuutti, Juulia Kautto, Jukka-Pekka Palmu   +6 more
doaj   +1 more source

Effects of basal topography and ice-sheet surface slope in a subglacial glaciofluvial deposition model

Journal of Glaciology, 2023
We use a mathematical model to investigate the effect of basal topography and ice surface slope on transport and deposition of sediment within a water-filled subglacial channel. In our model, three zones of different behaviour occur. In the zone furthest
David Stevens, Jeremy C. Ely, Stephen J. Livingstone, Chris D. Clark, Frances E. G. Butcher, Ian Hewitt   +5 more
doaj   +1 more source

Short-term variability in Greenland Ice Sheet motion forced by time-varying meltwater inputs: implications for the relationship between subglacial drainage system behavior and ice velocity. [PDF]

, 2012
High resolution measurements of ice motion along a 120 km transect in a land-terminating section of the GrIS reveal short-term velocity variations (<1 day), which are forced by rapid variations in meltwater input to the subglacial drainage system from
Cowton, Thomas, Bartholomew, Ian, Nienow, Peter, Sole, A., Mair, Douglas, Mair, D., Sole, Andrew, King, Matt A., Cowton, T., Bartholomew, I., King, M.A., Nienow, P.   +11 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., 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
core   +1 more source

Ice stream subglacial access for ice-sheet history and fast ice flow: the BEAMISH Project on Rutford Ice Stream, West Antarctica and initial results on basal conditions

Annals of Glaciology, 2021
Three holes were drilled to the bed of Rutford Ice Stream, through ice up to 2154 m thick, to investigate the basal processes and conditions associated with fast ice flow and the glacial history of the West Antarctic Ice Sheet.
A. M. Smith, P. G. D. Anker, K. W. Nicholls, K. Makinson, T. Murray, S. Rios-Costas, A. M. Brisbourne, D. A. Hodgson, R. Schlegel, S. Anandakrishnan   +9 more
doaj   +1 more source

Influence of subglacial drainage system evolution on glacier surface motion: Haut Glacier d'Arolla, Switzerland [PDF]

, 2002
The relationship between the evolution of subglacial drainage system morphology and spatial patterns of glacier surface velocity was investigated using dye tracing experiments and ground surveying throughout the 1995 melt season at Haut Glacier d'Arolla,
Ian Willis, Sharp, M., Wohlleben, T., Peter Nienow, Mair, D., Martin Sharp, Willis, I., Trudy Wohlleben, Douglas Mair, Nienow, P.   +9 more
core   +1 more source

Hydrological controls on diurnal ice flow variability in valley glaciers [PDF]

, 2005
This paper uses a combination of field data and three-dimensional modeling to investigate the spatial variability in basal conditions required to induce observed fluctuations in diurnal ice velocity at Haut Glacier d'Arolla, Switzerland.
Hubbard, A. L., Sharp, M. J., Chandler, D. M., Mair, D. W. F., Nienow, P. W., Willis, I. C., Hubbard, B. P.   +6 more
core   +1 more source

The Effect of Subglacial Chemical Processes on Glacier Sliding [PDF]

Journal of Glaciology, 1976
Abstract The glacier sliding theory of Nye is modified to include the effect of solutes in subglacial regelation waters on the sliding process. Motivation for this development stems from studies of subglacially formed chemical deposits that appear to be widespread on rock surfaces recently exposed by retreating temperate glaciers.
openaire   +1 more source

Incorporation of particulates into accreted ice above subglacial Vostok lake, Antarctica [PDF]

, 2005
The nature of microscopic particulates in meteoric and accreted ice from the Vostok (Antarctica) ice core is assessed in conjunction with existing ice-core data to investigate the mechanism by which particulates are incorporated into refrozen lake water.
Priscu, JC, Royston-Bishop, G, Siegert, MJ, Tranter, M, Christner, BC, Lee, V, Christner, B., Priscu, J. C., Siegert, M. J., Royston-Bishop, G., Tranter, M., Lee, V.   +11 more
core   +1 more source

Seismic characterization of a rapidly-rising jökulhlaup cycle at the A.P. Olsen Ice Cap, NE-Greenland

Journal of Glaciology, 2020
Rapidly-rising jökulhlaups, or glacial outburst floods, are a phenomenon with a high potential for damage. The initiation and propagation processes of a rapidly-rising jökulhlaup are still not fully understood.
Michael Behm, Jacob I. Walter, Daniel Binder, Feng Cheng, Michele Citterio, Bernd Kulessa, Kirsty Langley, Phillipe Limpach, Stefan Mertl, Wolfgang Schöner, Mikkel Tamstorf, Gernot Weyss   +11 more
doaj   +1 more source