Results 51 to 60 of about 1,001 (183)

Rift propagation signals the last act of the Thwaites Eastern Ice Shelf despite low basal melt rates

Journal of Glaciology
Rift propagation, rather than basal melt, drives the destabilization and disintegration of the Thwaites Eastern Ice Shelf. Since 2016, rifts have episodically advanced throughout the central ice-shelf area, with rapid propagation events occurring during ...
Christian T. Wild, Samuel B. Kachuck, Adrian Luckman, Karen E. Alley, Meghan A. Sharp, Haylee Smith, Scott W. Tyler, Christopher Kratt, Tiago S. Dotto, Daniel Price, Keith W. Nicholls, Suzanne L. Bevan, Gabriela Collao-Barrios, Atsuhiro Muto, Martin Truffer, Ted A. Scambos, Karen J. Heywood, Erin C. Pettit, the TARSAN team   +18 more
doaj   +1 more source

Crevasse-induced Rayleigh-wave azimuthal anisotropy on Glacier de la Plaine Morte, Switzerland

Annals of Glaciology, 2019
Crevasses and englacial fracture networks route meltwater from a glacier's surface to the subglacial drainage system and thus influence glacial hydraulics.
Fabian Lindner, Gabi Laske, Fabian Walter, Adrian K. Doran   +3 more
doaj   +1 more source

7000 Years of Aboriginal Mining at Sugarloaf Hill in the Riverland Region of South Australia

Archaeology in Oceania, Volume 61, Issue 2, Page 277-311, July 2026.
ABSTRACT Silcrete and chert are commonly represented in Aboriginal archaeological lithic assemblages across large parts of the southwestern Murray‐Darling Basin (MDB). In South Australia (SA), these materials were sourced from a series of quarries located along the incised course of the Murray River through the upper Riverland region.
Craig Westell, Ian Moffat, Richard Fullagar, Amy Roberts, Justine Kemp, Mike Morley, Marc Fairhead, Simon Hoad, River Murray and Mallee Aboriginal Corporation   +8 more
wiley   +1 more source

Theoretical stability of ice shelf basal crevasses with a vertical temperature profile

Journal of Glaciology
Basal crevasses threaten the stability of ice shelves through the potential to form rifts and calve icebergs. Furthermore, it is important to determine the dependence of crevasse stability on temperature due to large vertical temperature variations on ...
Niall Bennet Coffey, Ching-Yao Lai, Yongji Wang, W. Roger Buck, Trystan Surawy-Stepney, Anna Elizabeth Hogg   +5 more
doaj   +1 more source

Micro‐CT informed cranial anatomy of the early rhynchosaur Howesia browni, with implications for rhynchosaur skull evolution

Papers in Palaeontology, Volume 12, Issue 4, July/August 2026.
Abstract Rhynchosaurs are unusual archosauromorph reptiles that lived between the Induan and early Norian (Early to early Late Triassic). They are characterized by their stocky build and broad skull with a beak‐like premaxilla. This rather charismatic configuration is most clearly expressed in Late Triassic hyperodapedontine rhynchosaurids.
Stephan N. F. Spiekman, Claire Browning, Muofhe Tshibalanganda, Debarati Mukherjee, Roger M. H. Smith, Anton Du Plessis, Frederik Wolvaardt   +6 more
wiley   +1 more source

Calving dynamics at Jakobshavn Isbrae (Sermeq Kujalleq) controlled by local geometry: insights from a 3D Stokes calving model

Journal of Glaciology
We present the first simulations of Jakobshavn Isbrae (Sermeq Kujalleq), west Greenland, using a 3D Stokes calving model that permits unrestricted advance and retreat.
Iain Wheel, Anna J. Crawford, Douglas I. Benn   +2 more
doaj   +1 more source

Mechanisms for upstream migration of firn aquifer drainage: preliminary observations from Helheim Glacier, Greenland

Journal of Glaciology
Surface meltwater can influence subglacial hydrology and ice dynamics if it reaches ice sheet's base. Firn aquifers store meltwater and drain into wide crevasses marking the aquifer's downstream boundary, indicating water from firn aquifers can drive ...
Jessica Z. Mejia, Kristin Poinar, Colin R. Meyer, Aleah N. Sommers, Winnie Chu   +4 more
doaj   +1 more source

Transition Between Mechanical and Geometric Controls in Glacier Crevassing Processes

Geophysical Research Letters
Herein, fast fracture initiation in glacier ice is modeled using a Material Point Method and a simplified constitutive law describing tensile strain softening.
Hugo Rousseau, Johan Gaume, Lars Blatny, Martin P. Lüthi   +3 more
doaj   +1 more source

Steady crevasse locations in Pâkitsoq, Greenland, over one decade: Results from MimiNet, a new deep-learning model for crevasse detection

Journal of Glaciology
If crevasse fields deliver meltwater to the bed of the Greenland ice sheet, it would affect seasonal ice flow speeds and total mass balance. The best current automated tool to map crevasse fields extends only a few dozen kilometers inland.
Naureen Khan, Kristin Poinar, Jason Briner, Sophie Nowicki, Jessica Z. Mejia, Alexandra Avellaneda, Mary Verné   +6 more
doaj   +1 more source

Quantifying supraglacial meltwater pathways in the Paakitsoq region, West Greenland

Journal of Glaciology, 2017
Increased summer ice velocities on the Greenland ice sheet are driven by meltwater input to the subglacial environment. However, spatial patterns of surface input and partitioning of meltwater between different pathways to the base remain poorly ...
CONRAD KOZIOL, NEIL ARNOLD, ALLEN POPE, WILLIAM COLGAN   +3 more
doaj   +1 more source