Results 71 to 80 of about 145,942 (141)

Mapping Glacier Bed Topography in Crevassed Regions: A New Passive Seismic Reflection Method Applied to Isunnguata Sermia, West Greenland

Geophysical Research Letters, Volume 53, Issue 18, 28 September 2026.
Abstract Glacier bed topography is crucial for modeling ice mass loss. However, heavily crevassed regions are challenging to survey using conventional methods, leading to data gaps. We establish a passive seismic approach exploiting naturally occurring crevassing events recorded with a dense seismic array to image the ice–bed interface without spatial ...
Nicolas Paris, Florent Gimbert, Philippe Roux, Stephen J. Livingstone, Siobhan F. Killingbeck, Andrew J. Sole, Samuel H. Doyle, Jonathan D. Hawkins, Matthew W. Peacey, Adam D. Booth   +9 more
wiley   +1 more source

Estimating effective pressures in active subglacial lakes with ICESat-2 satellite altimetry

Journal of Glaciology
The difference between the ice and water pressures, or the effective pressure, influences water flow and sliding at the ice-bed interface. Effective pressure is typically quantified with subglacial hydrology models because direct measurements of the ...
Aaron Stubblefield, Aleah Nicholson Sommers, Colin Meyer, Lauren Cristy Andrews   +3 more
doaj   +1 more source

Q‐GlaRe+: An Open‐Source Framework for Palaeoglacier Reconstruction and Equilibrium‐Line Altitude Calculation

Earth Surface Processes and Landforms, Volume 51, Issue 9, September 2026.
Q‐GlaRe+ is an open‐source QGIS plugin for palaeoglacier reconstruction and equilibrium‐line altitude estimation. Validation against Swiss Alpine glaciers demonstrates accuracy comparable to proprietary tools. By removing software barriers and supporting FAIR principles, Q‐GlaRe+ enables broader access to glacier reconstruction capabilities and ...
Brian S. Burnham, Matteo Spagnolo, Ramon Pellitero, Yingkui Li, Iestyn Barr, Brice R. Rea, Alexios Kaselouris   +6 more
wiley   +1 more source

Sediment Characteristics and Architecture of Triangular‐Shaped Murtoos: A Test of Murtoo Formation Hypotheses

Earth Surface Processes and Landforms, Volume 51, Issue 9, September 2026.
Murtoos and murtooized terrains are new types of subglacial landforms found in the Fennoscandian Ice Sheet (FIS) and Cordilleran Ice Sheet (CIS) regions. LiDAR‐based morphometric analyses have revealed substantial morphometric diversity among murtoos and murtoo‐related landforms, while sedimentological excavations have documented a wide range of ...
A. E. K. Ojala, S. Soini, J. Mäkinen, J. Hovikoski, P. Sarala, A. Hepburn, K. Kajuutti, E. Ahokangas, J. Kautto   +8 more
wiley   +1 more source

A fast and simplified subglacial hydrological model for the Antarctic Ice Sheet and outlet glaciers [PDF]

The Cryosphere
We present a novel and computationally efficient subglacial hydrological model that represents in a simplified way both hard- and soft-bed rheologies, as well as an automatic switch between efficient and inefficient subglacial discharge, designed for ...
E. Kazmierczak, T. Gregov, T. Gregov, V. Coulon, F. Pattyn   +4 more
doaj   +1 more source

Toward an Improved Understanding of the Antarctic Coastal Zone and Its Contribution to Future Global Sea Level

Reviews of Geophysics, Volume 64, Issue 3, September 2026.
Abstract Understanding the coastal zone of the Antarctic Ice Sheet (AIS), where it interacts with the Southern Ocean and warmer air masses, is crucial for predicting Antarctica's influence on the global climate and sea level. This region has multiple tipping mechanisms that could trigger large, rapid, and potentially irreversible changes in the AIS ...
Kenichi Matsuoka, Geir Moholdt, Jennifer F. Arthur, Julien A. Bodart, Xiangbin Cui, Fausto Ferraccioli, René Forsberg, Vikram Goel, Tom A. Jordan, Felicity S. McCormack, Ruth Mottram, Hamish D. Pritchard, Calvin Shackleton, Kirsty J. Tinto, Fredrik Boberg, Marie G. P. Cavitte, Reinhard Drews, Pierre Dutrieux, Jörg Ebbing, Olaf Eisen, Hannes Eisermann, Alex S. Gardner, Chad A. Greene, Nicholas Holschuh, Stewart S. R. Jamieson, Byeong‐Hoon Kim, Naomi Krauzig, Bernd Kulessa, Carlton Leuschen, Jilu Li, Lu Li, Jonas Liebsch, Joseph A. MacGregor, Emma MacKie, Anirudha Mahagaonkar, Joséphine Maton, Mathieu Morlighem, Francisco Navarro, Peter D. Neff, Inès N. Otosaka, Frank Pattyn, Antonia Ruppel, Rebecca J. Sanderson, Hélène Seroussi, Andrew Shepherd, Matthew R. Siegfried, Thomas Slater, Arjen P. Stroeven, Michael Studinger, Thomas Teisberg, Ryan A. Venturelli, Jeremy P. Winberry, Chen Zhao, Lu An, Jonathan L. Bamber, Robin E. Bell, Robert G. Bingham, Johanna Brehmer‐Moltmann, Graeme Eagles, Jamin Greenbaum, Jorn Gronset, Won Sang Lee, Emmanuel Le Meur, Lenneke M. Jong, Katrin Lindbäck, Sven Lidström, Mareen Lösing, Masahiro Minowa, Mayuri Pandey, Yogesh Ray, Mirko Scheinert, Dustin M. Schroeder, Thorsten Seehaus, Kaian Shahateet, Daniel Steinhage, Xueyuan Tang, Drew Taylor, Hannah Verboncoeur, Junjun Yang, Duncan A. Young   +79 more
wiley   +1 more source

Climate Models Accurately Predict Ocean‐Going Meltwater Runoff From the Northwest Greenland Ice Sheet

Water Resources Research, Volume 62, Issue 9, September 2026.
Abstract Climatic surface mass balance (SMB) meltwater runoff models are used to estimate current and future Greenland Ice Sheet sea level contributions. However, comparisons between SMB model runoff and in situ proglacial river discharge observations show large discrepancies.
S. E. Esenther, L. C. Smith, A. Lewinter, C. Onclin, A. L. Boghosian, Å. K. Rennermalm, D. Petersen, L. C. Andrews   +7 more
wiley   +1 more source

Distinct Groundwater Regimes in West Antarctic Sedimentary Basins Inferred From Magnetotelluric Imaging

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 9, September 2026.
Abstract Subglacial sedimentary basins in Antarctica are hypothesized to modulate ice flow and biogeochemical cycles via groundwater and geothermal feedbacks, yet their properties remain poorly constrained. Here, we present a joint quantitative analysis of new magnetotelluric (MT) data acquired at Thwaites Glacier (TG) and WAIS Divide, alongside legacy
Siobhan F. Killingbeck, Bernd Kulessa, Rebecca Pearce, Alex Brisbourne, Louise Borthwick, Felipe Napoleoni, Sridhar Anandakrishnan, Martyn Unsworth, Atsuhiro Muto   +8 more
wiley   +1 more source

Internal Structure and Formation Process of a Giant East Antarctic Grounding‐Zone Wedge

Geophysical Research Letters, Volume 53, Issue 16, 28 August 2026.
Abstract The marine‐based portions of the East Antarctic Ice Sheet are currently losing mass at an accelerating rate due to atmospheric and oceanic forcing. Assessing these changes requires understanding long‐term grounding‐zone dynamics preserved in glacial geomorphology, including understudied East Antarctic shelf sectors.
C. A. Tobisch, J. P. Klages, R. S. Barrett, K. Hochmuth, T. Mühlberger‐Krause, L. M. Baumann, K. Gohl, S. Krastel   +7 more
wiley   +1 more source

Exploring Antarctic Feedback Mechanisms Using Two‐Way Coupled Subglacial Hydrology and Ice Flow Modeling in the Siple Coast

Geophysical Research Letters, Volume 53, Issue 15, 16 August 2026.
Abstract The Siple Coast region of West Antarctica is known for its fast flowing, topographically unconstrained ice streams that evolve due to subglacial conditions. In this work, we analyze the nature of the Siple Coast subglacial hydrologic system and its interactions with the ice sheet using two‐way coupled subglacial hydrology and ice flow modeling.
Koi McArthur, Christine Dow, Shivani Ehrenfeucht   +2 more
wiley   +1 more source