Results 31 to 40 of about 27,220 (294)
Short-Term Rheology of Polycrystalline Ice [PDF]
Journal of Glaciology, 1978 AbstractDeformation characteristics of polycrystalline ice and their dependence on time, temperature, and stress have been analysed on the basis of a phenomenological relation which describes creep in terms of initial elastic, delayed elastic, and permanent strain. It is shown that the effective modulus of ice observed in the laboratory or in the field
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Effective Rheology Across the Fragmentation Transition for Sea Ice and Ice Shelves [PDF]
Geophysical Research Letters, 2019 AbstractSea ice and ice shelves can be described by a viscoelastic rheology that is approximately linear elastic and brittle at high strain rates and viscously shear thinning at low strain rates. Brittle ice easily fractures under compressive shear and forms shear bands as the material undergoes a transition to a fragmented, granular state.
J.A. Åström, D.I. Benn
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Cyclic strengthening of lake ice
Journal of Glaciology, 2021 Further to systematic experiments on the flexural strength of laboratory-grown, fresh water ice loaded cyclically, this paper describes results from new experiments of the same kind on lake ice harvested in Svalbard. The experiments were conducted at −12
Andrii Murdza +3 more
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Journal of Glaciology, 2016 Englacial temperature is a major control on ice rheology and flow. However, it is difficult to measure at the glacier to ice-sheet scale. As a result, ice-sheet models must make assumptions about englacial temperature and rheology, which affect sea level
DUSTIN M. SCHROEDER +3 more
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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
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Modelling ice mélange based on the viscous-plastic sea-ice rheology
, 2023 Abstract. Ice mélange, which is a mixture of sea ice, bergy bits and icebergs, can have a strong influence on the sea-ice–ocean interaction. So far, ice mélange is not represented in climate models as numerically efficient realizations are missing. This motivates the development of an ice-mélange model based on the viscous-plastic sea-ice rheology ...
Saskia Kahl, Carolin Mehlmann, Dirk Notz
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Marine ice-sheet profiles and stability under Coulomb basal conditions [PDF]
, 2015 The behavior of marine-terminating ice sheets, such as the West Antarctic ice sheet, is of interest due to the possibility of rapid grounding-line retreat and consequent catastrophic loss of ice.
Stewart, Andrew L. +2 more
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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
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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
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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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