Results 51 to 60 of about 2,939 (220)

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

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

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

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

Assessing the catastrophic break-up of Briksdalsbreen, Norway, associated with rapid climate change [PDF]

, 2011
Recent research has raised concerns about the potential influence of rapid climate change on the stability of major ice sheets. The behaviour of glaciers is determined largely by the processes and conditions operating at their base.
Kathryn C. Rose, Vaughan-Hirsch, David, Rose, Kathryn C., Hart, Jane K., Jane K. Hart, Waller, Richard I., Waller, R.I., Martinez, Kirk, Kirk Martinez, Vaughan-Hirsch, D., David Vaughan-Hirsch, Martinez, K., Richard I. Waller   +12 more
core   +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

Geochronological reconstruction of the Lateglacial deglaciation in the Arve Valley (Northern French Alps)

Journal of Quaternary Science, EarlyView.
ABSTRACT The timing and spatial patterns of glaciers retreat in the Northern French Alps during the Lateglacial (19.0–11.7 ka) remain debated, reflecting discrepancies among available chronological data sets. The complex interactions between major glaciers, such as the Rhône and Arve glaciers to the north and the Isère glacier to the south, represent a
Quentin Portal, Christian Crouzet, Jean‐François Buoncristiani, Julien Carcaillet   +3 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

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