Results 41 to 50 of about 70,309 (180)

Model insights into bed control on retreat of Thwaites Glacier, West Antarctica

Journal of Glaciology, 2023
Thwaites Glacier (TG) plays an important role in future sea-level rise (SLR) contribution from the West Antarctic Ice Sheet. Recent observations show that TG is losing mass, and its grounding zone is retreating.
Emily Schwans, Byron R. Parizek, Richard B. Alley, Sridhar Anandakrishnan, Mathieu M. Morlighem   +4 more
doaj   +1 more source

Recent benthic foraminifera communities offshore of Thwaites Glacier in the Amundsen Sea, Antarctica: implications for interpretations of fossil assemblages [PDF]

Journal of Micropalaeontology
Benthic foraminiferal assemblages are useful tools for paleoenvironmental studies but rely on the calibration of live populations to modern environmental conditions to allow interpretation of this proxy downcore. In regions such as the region offshore of
A. A. Lehrmann, A. A. Lehrmann, R. L. Totten, R. L. Totten, J. S. Wellner, C.-D. Hillenbrand, S. Radionovskaya, S. Radionovskaya, R. M. Comas, R. D. Larter, A. G. C. Graham, J. D. Kirkham, K. A. Hogan, V. Fitzgerald, R. W. Clark, B. Hopkins, B. Hopkins, A. P. Lepp, E. Mawbey, R. V. Smyth, L. E. Miller, J. A. Smith, F. O. Nitsche   +22 more
doaj   +1 more source

Detection of Surface Crevasses over Antarctic Ice Shelves Using SAR Imagery and Deep Learning Method

Remote Sensing, 2022
Crevasses are formed by glacier movement and the stresses within glacier ice. Knowledge of the crevasses’ distribution is critical for understanding the glacier and ice shelf stability. In this study, we propose an automated crevasse extraction framework
Jingjing Zhao, Shuang Liang, Xinwu Li, Yiru Duan, Lei Liang   +4 more
doaj   +1 more source

Competing processes determine the long-term impact of basal friction parameterizations for Antarctic mass loss [PDF]

The Cryosphere
Previous studies do not agree on the magnitude of the influence of basal friction laws in sea-level projections. We use the Community Ice Sheet Model (CISM) to show that the sensitivity of the projected sea level rise to the choice of basal friction law ...
T. van den Akker, T. van den Akker, T. van den Akker, W. H. Lipscomb, G. R. Leguy, W. J. van de Berg, R. S. W. van de Wal, R. S. W. van de Wal, R. S. W. van de Wal   +8 more
doaj   +1 more source

Gravity analyses for the crustal structure and subglacial geology of West Antarctica, particularly beneath Thwaites Glacier [PDF]

, 2008
textThe West Antarctic Ice Sheet (WAIS) is mostly grounded in broad, deep basins (down to 2.5 km below sea level) that are stretched between five crustal blocks. The geometry of the bedrock, being mostly below sea level, induces a fundamental instability
Diehl, Theresa Marie, 1981-
core   +1 more source

The tipping points and early warning indicators for Pine Island Glacier, West Antarctica [PDF]

The Cryosphere, 2021
Mass loss from the Antarctic Ice Sheet is the main source of uncertainty in projections of future sea-level rise, with important implications for coastal regions worldwide. Central to ongoing and future changes is the marine ice sheet instability: once a
S. H. R. Rosier, R. Reese, J. F. Donges, J. F. Donges, J. De Rydt, G. H. Gudmundsson, R. Winkelmann, R. Winkelmann   +7 more
doaj   +1 more source

Acceleration of Pine Island and Thwaites Glaciers, West Antarctica [PDF]

Annals of Glaciology, 2002
AbstractRecent satellite investigations revealed that in the 1990s the grounding line of Pine Island and Thwaites Glaciers, West Antarctica, retreated several km, the ice surface on the interior of the basins lowered 10 cm a–1, and Pine Island Glacier thinned 1.6 ma–1.
Rignot, Eric, Vaughan, David G., Schmeltz, Majorie, Dupont, Todd, MacAyeal, Douglas   +4 more
openaire   +2 more sources

Ocean access beneath the southwest tributary of Pine Island Glacier, West Antarctica

Annals of Glaciology, 2018
The catchments of Pine Island Glacier and Thwaites Glacier in the Amundsen Sea Embayment are two of the largest, most rapidly changing, and potentially unstable sectors of the West Antarctic Ice Sheet.
Dustin M. Schroeder, Andrew M. Hilger, John D. Paden, Duncan A. Young, Hugh F. J. Corr   +4 more
doaj   +1 more source

Coupled ice–ocean interactions during future retreat of West Antarctic ice streams in the Amundsen Sea sector [PDF]

The Cryosphere
The Amundsen Sea sector has some of the fastest-thinning ice shelves in Antarctica, caused by high, ocean-driven basal melt rates, which can lead to increased ice streamflow, causing increased sea level rise (SLR) contributions. In this study, we present
D. T. Bett, A. T. Bradley, A. T. Bradley, C. R. Williams, P. R. Holland, R. J. Arthern, D. N. Goldberg   +6 more
doaj   +1 more source

Revealing the former bed of Thwaites Glacier using sea-floor bathymetry: implications for warm-water routing and bed controls on ice flow and buttressing [PDF]

The Cryosphere, 2020
The geometry of the sea floor immediately beyond Antarctica's marine-terminating glaciers is a fundamental control on warm-water routing, but it also describes former topographic pinning points that have been important for ice-shelf buttressing ...
K. A. Hogan, R. D. Larter, A. G. C. Graham, R. Arthern, J. D. Kirkham, J. D. Kirkham, R. Totten Minzoni, T. A. Jordan, R. Clark, V. Fitzgerald, A. K. Wåhlin, J. B. Anderson, C.-D. Hillenbrand, F. O. Nitsche, L. Simkins, J. A. Smith, K. Gohl, J. E. Arndt, J. Hong, J. Wellner   +19 more
doaj   +1 more source