Results 21 to 30 of about 217 (141)

Concentrated, ‘pulsed’ axial glacier flow: structural glaciological evidence from Kvíárjökull in SE Iceland [PDF]

Earth Surface Processes and Landforms, 2017
AbstractA detailed structural glaciological study carried out on Kvíárjökull in SE Iceland reveals that recent flow within this maritime glacier is concentrated within a narrow corridor located along its central axis. This active corridor is responsible for feeding ice from the accumulation zone on the south‐eastern side of Öræfajökull to the lower ...
Emrys Phillips, Jez Everest, David J.A. Evans, Andrew Finlayson, Marek Ewertowski, Ailsa Guild, Lee Jones   +6 more
openaire   +4 more sources

The influence of strain rate and presence of dispersed second phases on the deformation behaviour of polycrystalline D2O ice

Journal of Glaciology, 2019
This contribution discusses results obtained from 3-D neutron diffraction and 2-D fabric analyser in situ deformation experiments on laboratory-prepared polycrystalline deuterated ice and ice containing a second phase.
CHRISTOPHER J.L. WILSON, NICHOLAS J. R. HUNTER, VLADIMIR LUZIN, MARK PETERNELL, SANDRA PIAZOLO   +4 more
doaj   +1 more source

Modelling debris transport within glaciers by advection in a full-Stokes ice flow model [PDF]

The Cryosphere, 2018
Glaciers with extensive surface debris cover respond differently to climate forcing than those without supraglacial debris. In order to include debris-covered glaciers in projections of glaciogenic runoff and sea level rise and to understand the ...
A. Wirbel, A. H. Jarosch, L. Nicholson
doaj   +1 more source

Structural, tectonic and glaciological controls on the evolution of fjord landscapes

Geomorphology, 2009
Abstract The fjord landscape of South America, stretching ~ 1500 km between Golfo Corcovado (~ 43°S) and Tierra del Fuego (~ 56°S), is the largest continuous fjord landscape on Earth. This paper presents the results of new structural geological and geomorphological mapping of this landscape using optical satellite images and digital elevation models.
Glasser, Neil F., Ghiglione, Matias
openaire   +2 more sources

Tectonic processes in Svalbard tide-water glacier surges: evidence from structural glaciology [PDF]

Journal of Glaciology, 1994
AbstractThe tectonic effects of a glacier surge differ from those of steady state because flow is driven by longitudinal stresses rather than shear stresses. The orientations of recently formed crevasses, indicating the directions of the principal stresses, have been used to investigate tectonic processes in glacier surges recorded by repeat aerial ...
Hodgkins Richard, Julian A. Dowdeswell
openaire   +1 more source

Flow and structure in a dendritic glacier with bedrock steps

Journal of Glaciology, 2017
We analyse ice flow and structural glaciology of Shackleton Glacier, a dendritic glacier with multiple icefalls in the Canadian Rockies. A major tributary-trunk junction allows us to investigate the potential of tributaries to alter trunk flow and ...
HESTER JISKOOT, THOMAS A FOX, WESLEY VAN WYCHEN   +2 more
doaj   +1 more source

Structural provinces of the Ross Ice Shelf, Antarctica

Annals of Glaciology, 2017
The surface of the Ross Ice Shelf (RIS) is textured by flow stripes, crevasses and other features related to ice flow and deformation. Here, moderate resolution optical satellite images are used to map and classify regions of the RIS characterized by ...
Christine M. LeDoux, Christina L. Hulbe, Martin P. Forbes, Ted A. Scambos, Karen Alley   +4 more
doaj   +1 more source

Structural glaciology of the fast-moving Jakobshavn Isbræ, Greenland, compared to the surging Bering Glacier, Alaska, U.S.A. [PDF]

Annals of Glaciology, 2000
AbstractCrevasse patterns revealing mostly brittle deformation on glacier surfaces are analyzed based on video images collected during systematic overflights of Jakobshavn Isbræ, West Greenland, the Earths continuously fastest moving ice stream, in 1996 and 1997. Crevasse patterns on the surface of the central ice stream are distinct. All crevasses are
Helmut Mayer, Ute Christina Herzfeld
openaire   +1 more source

Glaciological history and structural evolution of the Shackleton Ice Shelf system, East Antarctica, over the past 60 years

The Cryosphere, 2023
Abstract. The discovery of Antarctica's deepest subglacial trough beneath the Denman Glacier, combined with high rates of basal melt at the grounding line, has caused significant concern over its vulnerability to retreat. Recent attention has therefore been focusing on understanding the controls driving Denman Glacier's dynamic evolution.
S. S. Thompson, S. S. Thompson, B. Kulessa, B. Kulessa, A. Luckman, J. A. Halpin, J. S. Greenbaum, T. Pelle, F. Habbal, J. Guo, L. M. Jong, J. L. Roberts, B. Sun, D. D. Blankenship   +13 more
openaire   +5 more sources

Former dynamic behaviour of a cold-based valley glacier on Svalbard revealed by basal ice and structural glaciology investigations [PDF]

Journal of Glaciology, 2015
AbstractLarge numbers of small valley glaciers on Svalbard were thicker and more extensive during the Little Ice Age (LIA), demonstrated by prominent ice-cored moraines up to several kilometres beyond present-day margins. The majority of these glaciers have since experienced a long period of strongly negative mass balance during the 20th century and ...
Lovell, H., Fleming, E.J., Benn, D.I., Hubbard, B., Lukas, S., Naegeli, K.   +5 more
openaire   +4 more sources