Results 61 to 70 of about 588,382 (370)

Mathematical Models of Ice Shelves [PDF]

Journal of Glaciology, 1976
For flat external ice shelves, expanding freely in all directions, the problem of thermodynamics is one-dimensional. In the affine dimensionless system of coordinates, equations of the dynamics together with the rheological equation lead to the non-linear integro-differential equation involving the reduced temperature.
P. A. Shumskiy, M. S. Krass
openaire   +1 more source

Simulating ice-shelf extent using damage mechanics

Journal of Glaciology, 2022
Inaccurate representations of iceberg calving from ice shelves are a large source of uncertainty in mass-loss projections from the Antarctic ice sheet. Here, we address this limitation by implementing and testing a continuum damage-mechanics model in a ...
Samuel B. Kachuck, Morgan Whitcomb, Jeremy N. Bassis, Daniel F. Martin, Stephen F. Price   +4 more
doaj   +1 more source

Ice Shelves: A Review [PDF]

Journal of Glaciology, 1979
AbstractIce shelves form where ice flows off the Antarctic ice sheet onto the sea to produce rather flat slabs of floating ice which, for the theoretician, are the simplest of all large ice masses. Boundary conditions are well defined, conditions change very slowly over distances that are large compared with ice thickness, and horizontal velocities are
openaire   +1 more source

Tidal bending of ice shelves as a mechanism for large-scale temporal variations in ice flow [PDF]

, 2018
GPS measurements reveal strong modulation of horizontal ice shelf and ice stream flow at a variety of tidal frequencies, most notably a fortnightly (Msf) frequency not present in the vertical tides themselves. Current theories largely fail to explain the
Gudmundsson, Hilmar, Rosier, Sebastian
core   +1 more source

Treatment of the ice-shelf backpressure and buttressing in two horizontal dimensions

Journal of Glaciology
The ice discharge from the grounded parts of marine ice sheets into the ocean is modulated by their floating extensions – ice shelves. The ice-shelf impact on the grounded ice is typically described as ‘backpressure’ or ‘buttressing’.
Olga Sergienko
doaj   +1 more source

Speed-up, slowdown, and redirection of ice flow on neighbouring ice streams in the Pope, Smith, and Kohler region of West Antarctica [PDF]

The Cryosphere
The ice streams feeding the Dotson and Crosson ice shelves are some of the fastest changing in West Antarctica. We use satellite observations to measure the change in ice speed and flow direction on eight ice streams in the Pope, Smith, and Kohler region
H. L. Selley, A. E. Hogg, B. J. Davison, P. Dutrieux, T. Slater   +4 more
doaj   +1 more source

Ocean processes at the Antarctic continental slope [PDF]

, 2014
The Antarctic continental shelves and slopes occupy relatively small areas, but, nevertheless, are important for global climate, biogeochemical cycling and ecosystem functioning.
Creed, Elizabeth, Fielding, Sophie, Guihen, Damien, Heuzé, Céline, Heywood, Karen J., Jickells, Timothy D., Kaiser, Jan, Lee, Craig M., Queste, Bastien Y., Ridley, Jeff K., Schmidtko, Sunke, Smith, Walker, Stevens, David P., Thompson, Andrew F., Wadley, Martin   +14 more
core   +3 more sources

Activation of Existing Surface Crevasses Has Limited Impact on Grounding Line Flux of Antarctic Ice Streams

Geophysical Research Letters, 2023
Recent studies have identified widespread vulnerable ice shelf regions in Antarctica which are both highly buttressed and susceptible to crevasse hydrofracturing, raising concern for potential crevasse driven ice‐shelf collapse and future sea level rise.
C. Gerli, S. Rosier, G. H. Gudmundsson
doaj   +1 more source

Substantial contribution of slush to meltwater area across Antarctic ice shelves

Nature Geoscience
Surface melting occurs across many of Antarctica’s ice shelves, mainly during the austral summer. The onset, duration, area and fate of surface melting varies spatially and temporally, and the resultant surface meltwater is stored as ponded water (lakes)
R. Dell, Ian C. Willis, Neil S. Arnold, A. Banwell, Sophie de Roda Husman   +4 more
semanticscholar   +1 more source

Modeling Antarctic tides in response to ice shelf thinning and retreat [PDF]

, 2014
Tides play an important role in ice sheet dynamics by modulating ice stream velocity, fracturing, and moving ice shelves and mixing water beneath them.
Green, J. A. M., Rosier, S. H. R., Scourse, J. D., Winkelmann, R.   +3 more
core   +6 more sources