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
An ice sheet model validation framework for the Greenland ice sheet [PDF]
Geoscientific Model Development, 2016 Abstract. We propose a new ice sheet model validation framework – the Cryospheric Model Comparison Tool (CmCt) – that takes advantage of ice sheet altimetry and gravimetry observations collected over the past several decades and is applied here to modeling of the Greenland ice sheet.
Stephen F. Price +17 more
openaire +7 more sources
Geology datasets in North America, Greenland and surrounding areas for use with ice sheet models [PDF]
Earth System Science Data, 2019 The ice–substrate interface is an important boundary condition for ice sheet modelling. The substrate affects the ice sheet by allowing sliding through sediment deformation and accommodating the storage and drainage of subglacial water.
E. J. Gowan +3 more
doaj +1 more source
Pliocene Ice Sheet Modelling Intercomparison Project (PLISMIP) – experimental design [PDF]
Geoscientific Model Development, 2012 During the mid-Pliocene warm period (3.264 to 3.025 million years ago), global mean temperature was similar to that predicted for the next century and atmospheric carbon dioxide concentrations were slightly higher than today.
A. M. Dolan +4 more
doaj +1 more source
Ice-sheet configuration in the CMIP5/PMIP3 Last Glacial Maximum experiments [PDF]
Geoscientific Model Development, 2015 We describe the creation of a data set describing changes related to the presence of ice sheets, including ice-sheet extent and height, ice-shelf extent, and the distribution and elevation of ice-free land at the Last Glacial Maximum (LGM), which were
A. Abe-Ouchi +10 more
doaj +1 more source
Bed topography and marine ice-sheet stability
Journal of Glaciology, 2022 This paper examines the effect of basal topography and strength on the grounding-line position, flux and stability of rapidly-sliding ice streams.
Olga V. Sergienko, Duncan J. Wingham
doaj +1 more source
Extended enthalpy formulations in the Ice-sheet and Sea-level System Model (ISSM) version 4.17: discontinuous conductivity and anisotropic streamline upwind Petrov–Galerkin (SUPG) method [PDF]
Geoscientific Model Development, 2020 The thermal state of an ice sheet is an important control on its past and future evolution. Some parts of the ice sheet may be polythermal, leading to discontinuous properties at the cold–temperate transition surface (CTS).
M. Rückamp +5 more
doaj +1 more source
Cosmogenic-nuclide data from Antarctic nunataks can constrain past ice sheet instabilities [PDF]
The Cryosphere, 2023 We apply geologic evidence from ice-free areas in Antarctica to evaluate model simulations of ice sheet response to warm climates. This is important because such simulations are used to predict ice sheet behaviour in future warm climates, but geologic ...
A. R. W. Halberstadt +3 more
doaj +2 more sources
Investigating the internal structure of the Antarctic ice sheet: the utility of isochrones for spatiotemporal ice-sheet model calibration [PDF]
The Cryosphere, 2021 Ice-sheet models are a powerful tool to project the evolution of the Greenland and Antarctic ice sheets and thus their future contribution to global sea-level changes. Testing the ability of ice-sheet models to reproduce the ongoing and past evolution of
J. Sutter +3 more
doaj +1 more source
A rapidly converging initialisation method to simulate the present-day Greenland ice sheet using the GRISLI ice sheet model (version 1.3) [PDF]
Geoscientific Model Development, 2019 Providing reliable projections of the ice sheet contribution to future sea-level rise has become one of the main challenges of the ice sheet modelling community.
S. Le clec'h +7 more
doaj +1 more source