Results 11 to 20 of about 27,220 (294)
Continuum sea ice rheology determined from subcontinuum mechanics [PDF]
Journal of Geophysical Research: Oceans, 2006 A method is presented to calculate the continuum‐scale sea ice stress as an imposed, continuum‐scale strain‐rate is varied. The continuum‐scale stress is calculated as the area‐average of the stresses within the floes and leads in a region (the continuum element). The continuum‐scale stress depends upon: the imposed strain rate; the subcontinuum scale,
Taylor, P. D. +3 more
core +8 more sources
Tidal bending of ice shelves as a mechanism for large-scale temporal variations in ice flow [PDF]
The Cryosphere, 2018 GPS measurements reveal strong modulation of horizontal ice shelf and ice stream flow at a variety of tidal frequencies, most notably a fortnightly (Msf) frequency not present in the vertical tides themselves.
S. H. R. Rosier, G. H. Gudmundsson
doaj +4 more sources
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 +3 more
doaj +1 more source
Quasi-static granular flow of ice mélange [PDF]
, 2018 We use Landsat 8 imagery to generate ice mélange velocity fields at Greenland’s three most productive outlet glaciers: Jakobshavn Isbræ, Helheim Glacier, and Kangerdlugssuaq Glacier.
Amundson, Jason M., Burton, J. C.
core +2 more sources
Variational inference of ice shelf rheology with physics-informed machine learning
Journal of Glaciology, 2023 Floating ice shelves that fringe the coast of Antarctica resist the flow of grounded ice into the ocean. One of the key factors governing the amount of flow resistance an ice shelf provides is the rigidity (related to viscosity) of the ice that ...
Bryan Riel, Brent Minchew
doaj +1 more source
Journal of Glaciology, 2018 Ice rheology governs how glaciers flow and respond to environmental change. The rheology of glacier ice evolves in response to a variety of mechanisms, including damage, heating, melting and the development of crystalline fabric.
BRENT M. MINCHEW +4 more
doaj +1 more source
Non-normal flow rules affect fracture angles in sea ice viscous–plastic rheologies [PDF]
The Cryosphere, 2021 The standard viscous–plastic (VP) sea ice model with an elliptical yield curve and a normal flow rule has at least two issues. First, it does not simulate fracture angles below 30∘ in uni-axial compression, in contrast with observations of linear ...
D. Ringeisen +3 more
doaj +1 more source
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
Impact of a new anisotropic rheology on simulations of Arctic sea ice [PDF]
, 2012 new rheology that explicitly accounts for the subcontinuum anisotropy of the sea ice cover is implemented into the Los Alamos sea ice model. This is in contrast to all models of sea ice included in global circulation models that use an isotropic rheology.
Brodeau +44 more
core +1 more source