Results 21 to 30 of about 3,442,527 (297)

Cosmogenic ages indicate no MIS 2 refugia in the Alexander Archipelago, Alaska [PDF]

Geochronology, 2022
The late-Pleistocene history of the coastal Cordilleran Ice Sheet remains relatively unstudied compared to chronologies of the Laurentide Ice Sheet. Yet accurate reconstructions of Cordilleran Ice Sheet extent and the timing of ice retreat along the ...
C. K. Walcott, J. P. Briner, J. F. Baichtal, A. J. Lesnek, J. M. Licciardi   +4 more
doaj   +1 more source

An assessment of key model parametric uncertainties in projections of Greenland Ice Sheet behavior [PDF]

, 2012
Lack of knowledge about the values of ice sheet model input parameters introduces substantial uncertainty into projections of Greenland Ice Sheet contributions to future sea level rise.
Stone, Emma J., N. Kirchner, K. Keller, Keller, K., Greve, Ralf, Applegate, P. J., Greve, R., R. Greve, Keller, Klaus, Kirchner, N., Applegate, Patrick J.,, Applegate, Patrick J., Kirchner, Nina, Stone, EJ, Kirchner, Nina,, E. J. Stone, Stone, E. J., P. J. Applegate   +17 more
core   +2 more sources

Implementation of higher-order vertical finite elements in ISSM v4.13 for improved ice sheet flow modeling over paleoclimate timescales [PDF]

Geoscientific Model Development, 2018
Paleoclimate proxies are being used in conjunction with ice sheet modeling experiments to determine how the Greenland ice sheet responded to past changes, particularly during the last deglaciation.
J. K. Cuzzone, J. K. Cuzzone, M. Morlighem, E. Larour, N. Schlegel, H. Seroussi   +5 more
doaj   +1 more source

Simulating higher-order fabric structure in a coupled, anisotropic ice-flow model: application to Dome C

Journal of Glaciology, 2023
Ice-crystal fabric can induce mechanical anisotropy that significantly affects flow, but ice-flow models generally do not include fabric development or its effect upon flow.
David A. Lilien, Nicholas M. Rathmann, Christine S. Hvidberg, Aslak Grinsted, M. Reza Ershadi, Reinhard Drews, Dorthe Dahl-Jensen   +6 more
doaj   +1 more source

Future sea-level projections with a coupled atmosphere-ocean-ice-sheet model

Nature Communications, 2023
Most global sea level projections ignore the active role of ice-sheet-climate coupling. Including this effect, a new modeling system simulates irreversible Antarctic ice-sheet loss and accelerating sea level rise for global mean temperatures >1.8oC.
Jun-Young Park, Fabian Schloesser, Axel Timmermann, Dipayan Choudhury, June-Yi Lee, Arjun Babu Nellikkattil   +5 more
doaj   +1 more source

Influence of temperature fluctuations on equilibrium
ice sheet volume [PDF]

The Cryosphere, 2018
Forecasting the future sea level relies on accurate modeling of the response of the Greenland and Antarctic ice sheets to changing temperatures. The surface mass balance (SMB) of the Greenland Ice Sheet (GrIS) has a nonlinear response to warming. Cold
T. B. Mikkelsen, A. Grinsted, P. Ditlevsen   +2 more
doaj   +1 more source

Sensitivity of isochrones to surface mass balance and dynamics

Journal of Glaciology, 2023
The interior of an ice sheet consists of layers of accumulated snow, which contain important information on accumulation and ice dynamics that are imprinted on layer shapes over time.
Alexios Theofilopoulos, Andreas Born
doaj   +1 more source

Investigating the multi-millennial evolution and stability of the Greenland ice sheet using remapped surface mass balance forcing [PDF]

The Cryosphere
Surface mass balance (SMB) forcing for projections of the future evolution of the Greenland ice sheet with stand-alone modeling approaches has been commonly derived from regional climate models (RCMs) on a fixed ice sheet topography.
C. Rahlves, C. Rahlves, H. Goelzer, A. Born, P. M. Langebroek   +4 more
doaj   +1 more source

A parallel implementation of the confined–unconfined aquifer system model for subglacial hydrology: design, verification, and performance analysis (CUAS-MPI v0.1.0) [PDF]

Geoscientific Model Development, 2023
The subglacial hydrological system affects (i) the motion of ice sheets through sliding, (ii) the location of lakes at the ice margin, and (iii) the ocean circulation by freshwater discharge directly at the grounding line or (iv) via rivers flowing over ...
Y. Fischler, T. Kleiner, C. Bischof, J. Schmiedel, R. Sayag, R. Emunds, R. Emunds, L. F. Oestreich, L. F. Oestreich, A. Humbert, A. Humbert   +10 more
doaj   +1 more source

On nonlinear strain theory for a viscoelastic material model and its implications for calving of ice shelves

Journal of Glaciology, 2019
In the current ice-sheet models calving of ice shelves is based on phenomenological approaches. To obtain physics-based calving criteria, a viscoelastic Maxwell model is required accounting for short-term elastic and long-term viscous deformation.
JULIA CHRISTMANN, RALF MÜLLER, ANGELIKA HUMBERT   +2 more
doaj   +1 more source