Results 21 to 30 of about 4,612 (262)

Modeling the Antarctic ice sheet [PDF]

open access: yesAnnals of Glaciology, 1997
A three-dimensional (3-D), high-resolution, non-linearly viscous, non-isothermal ice-sheet model is employed to calculate the “present-day” equilibrium regime of the Antarctic ice sheet and its evolution during the last glacial cycle.
Mikhail Verbitsky, Barry Saltzman
openaire   +1 more source

Investigating the internal structure of the Antarctic ice sheet: the utility of isochrones for spatiotemporal ice-sheet model calibration [PDF]

open access: yesThe 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

Investigating the sensitivity of numerical model simulations of the modern state of the Greenland ice-sheet and its future response to climate change [PDF]

open access: yesThe Cryosphere, 2010
Ice thickness and bedrock topography are essential boundary conditions for numerical modelling of the evolution of the Greenland ice-sheet (GrIS). The datasets currently in use by the majority of GrIS modelling studies are over two decades old and based ...
E. J. Stone   +3 more
doaj   +1 more source

The sensitivity of Northern Hemisphere ice sheets to atmospheric forcing during the last glacial cycle using PMIP3 models

open access: yesJournal of Glaciology, 2019
The evolution of Northern Hemisphere ice sheets through the last glacial cycle is simulated with the glacial index method by using the climate forcing from one General Circulation Model, COSMOS.
LU NIU   +4 more
doaj   +1 more source

Deglacial climate changes as forced by different ice sheet reconstructions [PDF]

open access: yesClimate of the Past, 2023
During the last deglaciation, the climate evolves from a cold state at the Last Glacial Maximum (LGM) at 21 ka (thousand years ago) with large ice sheets to the warm Holocene at ∼9 ka with reduced ice sheets.
N. Bouttes   +8 more
doaj   +1 more source

The Greenland-Ice-Sheet evolution over the last 24 000 years: insights from model simulations evaluated against ice-extent markers [PDF]

open access: yesThe Cryosphere
Continental ice sheets retain a long-term memory stored in their geometry and thermal properties. In Greenland, this creates a disequilibrium with the present climate, as the ice sheet is still adjusting to past changes that occurred over millennial ...
T. P. M. Leger   +6 more
doaj   +1 more source

Glacial cycles and ice-sheet modelling [PDF]

open access: yesClimatic Change, 1982
An attempt is made to simulate the Pleistocene glacial cycles with a numerical model of the Northern Hemisphere ice sheets. This model treats the vertically-integrated ice flow along a meridian, including computation of bedrock adjustment and temperature distribution in the ice. Basal melt water is traced and controls ice-mass discharge.
openaire   +2 more sources

The effect of buttressing on grounding line dynamics

open access: yesJournal of Glaciology, 2018
Determining the position and stability of the grounding line of a marine ice sheet is a major challenge for ice-sheet models. Here, we investigate the role of lateral shear and ice-shelf buttressing in grounding line dynamics by extending an existing ...
MARIANNE HASELOFF, OLGA V. SERGIENKO
doaj   +1 more source

Global ice sheet modeling [PDF]

open access: yes, 1994
The University of Maine conducted this study for Pacific Northwest Laboratory (PNL) as part of a global climate modeling task for site characterization of the potential nuclear waste respository site at Yucca Mountain, NV. The purpose of the study was to develop a global ice sheet dynamics model that will forecast the three-dimensional configuration of
Hughes, T.J., Fastook, J.L.
openaire   +2 more sources

Mid-Holocene thinning of David Glacier, Antarctica: chronology and controls [PDF]

open access: yesThe Cryosphere, 2021
Quantitative satellite observations only provide an assessment of ice sheet mass loss over the last four decades. To assess long-term drivers of ice sheet change, geological records are needed. Here we present the first millennial-scale reconstruction of
J. Stutz   +23 more
doaj   +1 more source

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