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
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Comparison of sea ice kinematics at different resolutions modeled with a grid hierarchy in the Community Earth System Model (version 1.2.1) [PDF]
Geoscientific Model Development, 2021 High-resolution sea ice modeling is becoming widely available for both operational forecasts and climate studies. In traditional Eulerian grid-based models, small-scale sea ice kinematics represent the most prominent feature of high-resolution ...
S. Xu +7 more
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Tuning parameters of a sea ice model using machine learning [PDF]
Geoscientific Model DevelopmentWe developed a new method for tuning sea ice rheology parameters, which consists of two components: a new metric for characterising sea ice deformation patterns and a machine learning (ML)-based approach for tuning rheology parameters. We applied the new
A. Korosov, Y. Ying, E. Ólason
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Rheology of Ice II and Ice III from High‐Pressure Extrusion [PDF]
Geophysical Research Letters, 1986 Rheological parameters for ice II and ice III, needed in tectonic models of the icy satellites of the major planets, are obtained from extrusion experiments and compared with the rheology of ice I at pressures ∼2 kbar and temperatures ∼240K. Ice II has a higher effective viscosity (by a factor ∼10) than ice I at similar stress levels, whereas ice III ...
Echelmeyer, Keith, Kamb, Barclay
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A new brittle rheology and numerical framework for large-scale sea-ice models
, 2023 International audienceWe present a new brittle rheology and an accompanying numerical framework for large-scale sea-ice modelling. We have based this rheology on a Bingham-Maxwell constitutive model and the Maxwell-Elasto-Brittle (MEB) rheology for sea ...
Rampal, Pierre +15 more
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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
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A unified framework for large-scale fabric evolution models and anisotropic rheologies [PDF]
The CryosphereIce is anisotropic, with its viscosity varying by an order of magnitude in different directions when ice crystals align. However, how this variation affects ice flow is not well understood.
D. H. Richards +5 more
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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
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A hybrid ice-mélange model based on particle and continuum methods [PDF]
The CryosphereIce mélange, a composite of sea ice and icebergs, can have a major influence on sea-ice–ocean interactions. However, ice mélange has not been represented in climate models because numerically efficient realizations do not exist.
S. Kahl, C. Mehlmann, D. Notz
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Landfast sea ice material properties derived from ice bridge simulations using the Maxwell elasto-brittle rheology [PDF]
The Cryosphere, 2020 The Maxwell elasto-brittle (MEB) rheology is implemented in the Eulerian finite-difference (FD) modeling framework commonly used in classical viscous-plastic (VP) models.
M. Plante +3 more
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