Results 21 to 30 of about 574,262 (277)

Large-scale englacial folding and deep-ice stratigraphy within the West Antarctic Ice Sheet [PDF]

The Cryosphere, 2020
It has been hypothesized that complex englacial structures identified within the East Antarctic and Greenland ice sheets are generated by (i) water freezing to the ice sheet base and evolving under ice flow, (ii) deformation of ice of varying rheology ...
N. Ross, H. Corr, M. Siegert
doaj   +1 more source

Sea Ice Rheology Experiment (SIREx): 2. Evaluating Linear Kinematic Features in High-Resolution Sea Ice Simulations [PDF]

, 2022
Simulating sea ice drift and deformation in the Arctic Ocean is still a challenge because of the multiscale interaction of sea ice floes that compose the Arctic Sea ice cover.
Rampal, Pierre, Myers, Paul G., Bouchat, Amelie, Olason, Einar, Tremblay, Bruno, Wang, Qiang, Lemieux, Jean-Francois, Losch, Martin, Talandier, Claude, Hutter, Nils, Koldunov, Nikolay, Ramussen, Till, Lique, Camille, Maslowski, Wieslaw, Dupont, Frederic, Lee, Younjoo J., Dukhovskoy   +16 more
core   +1 more source

Presentation and evaluation of the Arctic sea ice forecasting system neXtSIM-F [PDF]

The Cryosphere, 2021
The neXtSIM-F (neXtSIM forecast) forecasting system consists of a stand-alone sea ice model, neXtSIM (neXt-generation Sea Ice Model), forced by the TOPAZ ocean forecast and the ECMWF atmospheric forecast, combined with daily data assimilation of sea ice ...
T. Williams, A. Korosov, P. Rampal, P. Rampal, E. Ólason   +4 more
doaj   +1 more source

Method of determining a geophysical-scale sea ice rheology from laboratory measurements

, 2003
We present a methodology that allows a sea ice rheology, suitable for use in a General Circulation Model (GCM), to be determined from laboratory and tank experiments on sea ice when combined with a kinematic model of deformation.
Sammonds, P. R., Feltham, D. L., Hatton, D.   +2 more
core   +7 more sources

Impact of rheology on probabilistic forecasts of sea ice trajectories: application for search and rescue operations in the Arctic [PDF]

The Cryosphere, 2018
We present a sensitivity analysis and discuss the probabilistic forecast capabilities of the novel sea ice model neXtSIM used in hindcast mode. The study pertains to the response of the model to the uncertainty on winds using probabilistic forecasts ...
M. Rabatel, P. Rampal, A. Carrassi, L. Bertino, C. K. R. T. Jones   +4 more
doaj   +1 more source

A new approach to inferring basal drag and ice rheology in ice streams, with applications to West Antarctic Ice Streams

Journal of Glaciology, 2021
Drag at the bed and along the lateral margins are the primary forces resisting flow in outlet glaciers. Simultaneously inferring these parameters is challenging since basal drag and ice viscosity are coupled in the momentum balance, which governs ice ...
Meghana Ranganathan, Brent Minchew, Colin R. Meyer, G. Hilmar Gudmundsson   +3 more
doaj   +1 more source

Volcano-ice interactions at Prestahnukur, Iceland : rhyolite eruption during the last interglacial-glacial transition. [PDF]

, 2006
Prestahnukur is a 570m high rhyolite glaciovolcanic edifice in Iceland's Western Rift Zone with a volume of 0.6 km3. Uniform whole rock, mineral and glass compositions suggest that Prestahnukur was constructed during the eruption of one magma batch.
Tindle, A.G., Burgess, R, A. G. Tindle, Tuffen, H, Stevenson, John A., Stevenson, J. A., R. Burgess, McGarvie, David W, Tuffen, H., McGarvie, D. W., Burgess, R.; id_orcid, McGarvie, D.W., H. Tuffen, McGarvie, David W., Tindle, AG, Stevenson, J.A., J. A. Stevenson, D. W. Mcgarvie, Burgess, R., Tuffen, Hugh, Tindle, A. G., Stevenson, John A   +21 more
core   +5 more sources

RHEOLOGY OF GLACIER ICE

Le Journal de Physique Colloques, 1985
A new method for calculating the stress field in bounded ice shelves is used to compare strain rate and deviatoric stress on the Ross Ice Shelf, Antarctica. The analysis shows that strain rate (per second) increases as the third power of deviatoric stress (in newtons per square meter), with a constant of proportionality equal to 2.3 x 10
Jezek, K., Alley, R., Thomas, R.
openaire   +3 more sources

Rheology of planetary ices [PDF]

, 1996
The brittle and ductile rheology of ices of water, ammonia, methane, and other volatiles, in combination with rock particles and each other, have a primary influence of the evolution and ongoing tectonics of icy moons of the outer solar system. Laboratory experiments help constrain the rheology of solar system ices. Standard experimental techniques can
Durham, W.B., Kirby, S.H., Stern, L.A.
openaire   +2 more sources

A Monte-Carlo error analysis for basal sliding velocity calculations [PDF]

, 2006
Since glacier beds are mostly inaccessible, numerical inversion of the surface velocity field provides a valuable method for calculating the basal shear stress and sliding velocity. However, previous theoretical studies (limited either to planar slabs or
Nienow, Peter, Chandler, D. M., Hubbard, B. P.   +2 more
core   +1 more source