Results 41 to 50 of about 544,035 (290)
Sediment behavior controls equilibrium width of subglacial channels
Journal of Glaciology, 2017 Flow-frictional resistance at the base of glaciers and ice sheets is strongly linked to subglacial water pressure. Understanding the physical mechanisms that govern meltwater fluxes in subglacial channels is hence critical for constraining variations in ...
ANDERS DAMSGAARD +5 more
doaj +1 more source
Wave–ice interactions in the neXtSIM sea-ice model [PDF]
The Cryosphere, 2017 In this paper we describe a waves-in-ice model (WIM), which calculates ice breakage and the wave radiation stress (WRS). This WIM is then coupled to the new sea-ice model neXtSIM, which is based on the elasto-brittle (EB) rheology.
T. D. Williams, P. Rampal, S. Bouillon
doaj +1 more source
Effect of an orientation-dependent non-linear grain fluidity on bulk directional enhancement factors
Journal of Glaciology, 2021 Bulk directional enhancement factors are determined for axisymmetric (girdle and single-maximum) orientation fabrics using a transversely isotropic grain rheology with an orientation-dependent non-linear grain fluidity.
Nicholas M. Rathmann +4 more
doaj +1 more source
On the physical basis for the creep of ice: the high temperature regime
Journal of Glaciology, 2020 This work quantifies the increased temperature sensitivity of the constitutive behavior of ice with proximity to the melting point in terms of dislocation mechanics.
D.M. Cole
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Sensitivity of Andean Glaciers to ice-flow parameters in the Parallel Ice Sheet Model [PDF]
The CryosphereMountain glaciers are losing mass rapidly due to anthropogenic climate change. Projections of glacier evolution across the Andes under different warming scenarios have primarily been as part of global scale modelling frameworks, rather than dedicated ...
E. Lee +4 more
doaj +1 more source
Strengthening of columnar-grained freshwater ice through cyclic flexural loading
Journal of Glaciology, 2020 Systematic experiments reveal that the flexural strength of freshwater S2 columnar-grained ice loaded normal to the columns increases upon cyclic loading.
Andrii Murdza +2 more
doaj +1 more source
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 +2 more
core +1 more source
Rheology of Discrete Failure Regimes of Anisotropic Sea Ice [PDF]
Journal of Physical Oceanography, 2012 ABSTRACT A rheological model of sea ice is presented that incorporates the orientational distribution of ice thickness in leads embedded in isotropic floe ice. Sea ice internal stress is determined by coulombic, ridging and tensile failure at orientations where corresponding failure criteria are satisfied at minimum stresses. Because sea
Wilchinsky, Alexander V. +1 more
openaire +1 more source
Journal of GlaciologyAccurate modeling of firn densification is necessary for ice core interpretation and assessing the mass balance of glaciers and ice sheets. In this paper, we revisit the nonlinear-viscous firn rheology introduced by Gagliardini and Meyssonnier (1997 ...
Jon Arrizabalaga-Iriarte +4 more
doaj +1 more source
A Maxwell elasto-brittle rheology for sea ice modelling [PDF]
The Cryosphere, 2016 Abstract. A new rheological model is developed that builds on an elasto-brittle (EB) framework used for sea ice and rock mechanics, with the intent of representing both the small elastic deformations associated with fracturing processes and the larger deformations occurring along the faults/leads once the material is highly damaged and fragmented.
Dansereau, Véronique +3 more
openaire +5 more sources