Results 51 to 60 of about 2,943 (230)

Hydraulic impacts of glacier advance over a sediment bed [PDF]

, 2006
A sedimentary sequence of till overlying a gravel aquifer was instrumented with water-pressure transducers prior to a small, anticipated surge of the margin of the glacier Breiðamerkurjökull in Iceland.
Zatsepin, Sergei, Boulton, Geoffrey
core   +1 more source

Deglaciation of the Burren glacio‐karst, western Ireland, during Termination 1: Implications for North Atlantic climate and karstification

Journal of Quaternary Science, EarlyView.
Abstract The Burren uplands in western Ireland form one of the most extensive and best‐preserved examples of glacio‐karst in Europe. Subsumed by the Irish ice sheet during the Late Pleistocene, granite erratic boulders and in situ silica veins in the limestone bedrock provide a rare opportunity to reconstruct the timing and rate of deglaciation ...
Gordon Bromley, Colin Bunce, Brenda Hall, Aaron Putnam, Frank McDermott   +4 more
wiley   +1 more source

Sedimentary signatures of basal ice formation and their preservation in ice-marginal sediments [PDF]

, 2011
Reconstruction of subglacial processes from sedimentological evidence is central to our understanding of glaciological conditions beneath former ice masses.
Nicholas G. Midgley (7190381), Swift, Darrel A., David Graham (1229835), William G. Adam (7190384), Nicholas G. Midgley, Darrel A. Swift, Cook, Simon; id_orcid, Graham, David J., Adam, William G., Swift, DA, William G. Adam, Darrel A. Swift (7190378), Graham, DJ, Midgley, Nicholas G., Simon J. Cook, Cook, SJ, David J. Graham, Midgley, NG, Simon J. Cook (7190372)   +18 more
core   +1 more source

Rapidly changing subglacial hydrological pathways at a tidewater glacier revealed through simultaneous observations of water pressure, supraglacial lakes, meltwater plumes and surface velocities [PDF]

The Cryosphere, 2017
Subglacial hydrological processes at tidewater glaciers remain poorly understood due to the difficulty in obtaining direct measurements and lack of empirical verification for modelling approaches.
P. How, P. How, D. I. Benn, N. R. J. Hulton, N. R. J. Hulton, B. Hubbard, A. Luckman, A. Luckman, H. Sevestre, W. J. J. van Pelt, K. Lindbäck, J. Kohler, W. Boot   +12 more
doaj   +1 more source

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

Outlet glacier flow response to surface melt: based on analysis of a high-resolution satellite data set

Journal of Glaciology, 2023
The dynamics of the Greenland Ice Sheet are affected by surface meltwater reaching the base of the ice, altering ice contact with the bedrock. Lack of understanding of this evolution hampers the ability to predict the effects of increasing temperatures ...
Signe H. Larsen, Andreas P. Ahlstrøm, Nanna B. Karlsson, Anders Kusk, Peter L. Langen, Christine S. Hvidberg   +5 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

Origin and significance of 'dispersed facies' basal ice: Svínafellsjökull, Iceland [PDF]

, 2010
Dispersed facies basal ice - massive (i.e. structureless) ice with dispersed debris aggregates - is present at the margins of many glaciers and, as a product of internal glacial processes, has the potential to provide important information about the ...
Nicholas G. Midgley (7190381), Swift, Darrel A., David Graham (1229835), Nicholas G. Midgley, Darrel A. Swift, Cook, Simon; id_orcid, Graham, David J., Swift, DA, Darrel A. Swift (7190378), Graham, DJ, Midgley, Nicholas G., Simon J. Cook, Cook, SJ, David J. Graham, Midgley, NG, Simon J. Cook (7190372)   +15 more
core   +1 more source

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   +1 more source

Enthalpy balance theory unifies diverse glacier surge behaviour

Annals of Glaciology, 2022
It is commonly asserted that there are two distinct classes of glacier surges: slow, long-duration ‘Svalbard-type’ surges, triggered by a transition from cold- to warm-based conditions (thermal switching), and fast, shorter-duration ‘Alaska-type’ surges ...
Douglas I. Benn, Ian J. Hewitt, Adrian J. Luckman   +2 more
doaj   +1 more source