Results 61 to 70 of about 3,604 (203)

Antarctic Ice Sheet melting in the southeast Pacific [PDF]

Geophysical Research Letters, 1996
The first oceanographic measurements across a deep channel beneath the calving front of Pine Island Glacier reveal a sub‐ice circulation driven by basal melting of 10–12 m yr−1. A salt box model described here gives a melt rate similar to that of ice balance and numerical models, 5–50 times higher than averages for the George VI and Ross Ice Shelves ...
Jacobs, Stanley S., Hellmer, Hartmut H., Jenkins, Adrian   +2 more
openaire   +2 more sources

Antarctic ice sheet response to sudden and sustained ice-shelf collapse (ABUMIP)

Journal of Glaciology, 2020
Antarctica's ice shelves modulate the grounded ice flow, and weakening of ice shelves due to climate forcing will decrease their ‘buttressing’ effect, causing a response in the grounded ice.
Sainan Sun, Frank Pattyn, Erika G. Simon, Torsten Albrecht, Stephen Cornford, Reinhard Calov, Christophe Dumas, Fabien Gillet-Chaulet, Heiko Goelzer, Nicholas R. Golledge, Ralf Greve, Matthew J. Hoffman, Angelika Humbert, Elise Kazmierczak, Thomas Kleiner, Gunter R. Leguy, William H. Lipscomb, Daniel Martin, Mathieu Morlighem, Sophie Nowicki, David Pollard, Stephen Price, Aurélien Quiquet, Hélène Seroussi, Tanja Schlemm, Johannes Sutter, Roderik S. W. van de Wal, Ricarda Winkelmann, Tong Zhang   +28 more
doaj   +1 more source

Impact of ice sheet meltwater fluxes on the climate evolution at the onset of the Last Interglacial [PDF]

Climate of the Past, 2016
Large climate perturbations occurred during the transition between the penultimate glacial period and the Last Interglacial (Termination II), when the ice sheets retreated from their glacial configuration.
H. Goelzer, P. Huybrechts, M.-F. Loutre, T. Fichefet   +3 more
doaj   +1 more source

Composition and Provenance of Victoria Group Sandstones in Southern North Victoria Land, Antarctica

New Zealand Journal of Geology and Geophysics, Volume 69, Issue 3, September 2026.
Three distinct source areas contributed to sandstones of the Victoria Group within the Transantarctic Basin in southern North Victoria Land. During the Permian, quartzose sandstones were derived from erosion of the local Ross Orogen, likely from an uplifted swell in the area of today's Ross Sea, the Ross High.
Martin Elsner, Robert Schöner, Reinhard Gaupp, Andreas Kronz, Benjamin Bomfleur, Joerg W. Schneider, Lothar G. Viereck   +6 more
wiley   +1 more source

A Three-Dimensional Model of the Antarctic Ice Sheet [PDF]

Annals of Glaciology, 1988
A preliminary version of a three-dimensional ice-sheet model for later use in climate models, but excluding ice shelves and basal sliding, is presented and applied to the Antarctic ice sheet. In the model, the three-dimensional fields of velocity and temperature are calculated in the coupled mode, and the temperature equation is integrated for 150 000 ...
openaire   +2 more sources

Towards Oblique Engagements With ‘Tipping Points’: A Critical Geography for Redirecting Debates

Transactions of the Institute of British Geographers, Volume 51, Issue 3, September 2026.
ABSTRACT This intervention brings debates about tipping points into conversation with critical geographical thinking to suggest a more ‘oblique’ engagement with the concept. Such an approach is vital for rethinking the normative discourses and established imaginaries that dominate in the application of ‘tipping’ to understandings of environmental ...
Rachael Squire, Cameron Byron, Nadège Legroux, Kimberley Peters   +3 more
wiley   +1 more source

The potential of marine ice cliff instability for Amundsen Sea glaciers revisited

Annals of Glaciology
Marine ice cliff instability (MICI) is the hypothesis that self-sustained retreat of ice sheets can be initiated when sufficiently tall ice cliffs are exposed.
Sainan Sun, Gudmundur Hilmar Gudmundsson
doaj   +1 more source

Grounding-line flux formula applied as a flux condition in numerical simulations fails for buttressed Antarctic ice streams [PDF]

The Cryosphere, 2018
Currently, several large-scale ice-flow models impose a condition on ice flux across grounding lines using an analytically motivated parameterisation of grounding-line flux.
R. Reese, R. Reese, R. Winkelmann, R. Winkelmann, G. H. Gudmundsson   +4 more
doaj   +1 more source

Atmospheric River‐Cyclone Events Disrupting an Antarctic Peninsula Field Campaign: Dynamics, Mesoscale Wind Amplification, and Long‐Term Context

Journal of Geophysical Research: Atmospheres, Volume 131, Issue 16, 28 August 2026.
Abstract Extreme weather in the Antarctic Peninsula arises from interactions among large‐scale circulation variability, atmospheric rivers (ARs), extratropical cyclones, and complex coastal terrain, yet the linkages across these scales remain insufficiently resolved.
D. Bozkurt, F. Fernandoy, S. MacDonell, L. M. Gaete, J. F. Carrasco   +4 more
wiley   +1 more source

Coupling framework (1.0) for the Úa (2023b) ice sheet model and the FESOM-1.4 z-coordinate ocean model in an Antarctic domain [PDF]

Geoscientific Model Development
The rate at which the Antarctic ice sheet loses mass is to a large degree controlled by ice–ocean interactions underneath small ice shelves, with the most sensitive regions concentrated in even smaller areas near grounding lines and local pinning points.
O. Richter, O. Richter, O. Richter, R. Timmermann, G. H. Gudmundsson, J. De Rydt   +5 more
doaj   +1 more source