Results 31 to 40 of about 216 (140)

Effects of microparticles on deformation and microstructural evolution of fine-grained ice

Journal of Glaciology, 2019
We investigated the effects of microparticles and grain size on the microstructural evolutions and mechanical properties of polycrystalline ice. Uniaxial compression tests were conducted using fine-grained pure ice and silica-dispersed ice under various ...
TOMOTAKA SARUYA, KOKI NAKAJIMA, MORIMASA TAKATA, TOMOYUKI HOMMA, NOBUHIKO AZUMA, KUMIKO GOTO-AZUMA   +5 more
doaj   +1 more source

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 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

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

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

Response of glacier flow and structure to proglacial lake development and climate at Fjallsjökull, south-east Iceland

Journal of Glaciology, 2019
Over recent decades, the number of outlet glaciers terminating in lakes in Iceland has increased in line with climate warming. The mass-balance changes of these lake-terminating outlet glaciers are sensitive to rising air temperatures, due to altered ...
REBECCA DELL, RACHEL CARR, EMRYS PHILLIPS, ANDREW J. RUSSELL   +3 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