Improvements on the Discretisation of Boundary Conditions to the Momentum Balance for Glacial Ice
Journal of GlaciologyThe flow of glacial ice is typically approximated as a nonNewtonian viscous fluid, with the momentum balance described by (an approximation to) the Stokes equations, and the nonlinear rheology described by a flow law.
Tijn Berends, Roderik S. W. van de Wal
exaly +3 more sources
A shallow approximation for ice streams sliding over strong beds
Journal of Glaciology, 2023 Ice streams are regions of rapid ice sheet flow characterised by a high degree of sliding over a deforming bed. The shallow shelf approximation (SSA) provides a convenient way to obtain closed-form approximations of the velocity and flux in a rapidly ...
Katarzyna L. P. Warburton +3 more
doaj +1 more source
Thermal controls on ice stream shear margins
Journal of Glaciology, 2021 Ice stream discharge responds to a balance between gravity, basal friction and lateral drag. Appreciable viscous heating occurs in shear margins between ice streams and adjacent slow-moving ice ridges, altering the temperature-dependent viscosity ...
Pierce Hunter +4 more
doaj +1 more source
Quaternary Glacial Geology of Alta Ribagorqa Basin (Central Southern Pyrenees) [PDF]
, 2012 This paper is an abstract of the doctoral thesis presented by the autor at the University of Barcelona on September 1983. It constitutes a regional study about the Quatemary Glacial Geology in the Ribagorca high valleys.
Vilaplana, Joan Manuel
core +5 more sources
Effects of impurities on the ice microstructure of Monte Perdido Glacier, Central Pyrenees, NE Spain
Annals of Glaciology, 2023 Monte Perdido Glacier, located in the central Pyrenees, is one of the southernmost glaciers in Europe. Due to climate change, this glacier is suffering an accelerated mass loss, especially in the last decades.
Nicolás González-Santacruz +5 more
doaj +1 more source
The finite-volume method in computational rheology [PDF]
, 2012 The finite volume method (FVM) is widely used in traditional computational fluid dynamics (CFD), and many commercial CFD codes are based on this technique which is typically less demanding in computational resources than finite element methods (FEM ...
Pinho, F.T. +4 more
core +3 more sources
GRACE constraints on Earth rheology of the Barents Sea and Fennoscandia [PDF]
Solid Earth, 2020 The Barents Sea is situated on a continental margin and was home to a large ice sheet at the Last Glacial Maximum. Studying the solid Earth response to the removal of this ice sheet (glacial isostatic adjustment; GIA) can give insight into the subsurface
M. Rovira-Navarro +6 more
doaj +1 more source
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
High-resolution LiDAR mapping of glacial landforms and ice stream lobes in Finland [PDF]
Bulletin of the Geological Society of Finland, 2017 Newly available high resolution airborne LiDAR (Light Detection And Ranging) technology is generating unprecedented next-generation imagery of Earth surface features. LiDAR datasets are being employed by the Geological Survey of Finland (GTK) as part of
N. Putkinen +13 more
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Upward Expansion of Supra-Glacial Debris Cover in the Hunza Valley, Karakoram, During 1990 ∼ 2019
Frontiers in Earth Science, 2020 Supra-glacial debris cover is key to glacier ablation through increasing (thin debris layer) or decreasing (thick debris layer) melt rates, thereby regulating the mass balance of a glacier and its meltwater runoff.
Fuming Xie +17 more
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