Results 71 to 80 of about 5,343,927 (201)

Lead isotope evidence for Antarctic Ice Sheet changes in the Weddell Sea sector since the Last Glacial Maximum

Boreas, EarlyView.
The Weddell Sea influences global ocean circulation and sea level through modulating Antarctic Bottom Water formation and Antarctic Ice Sheet discharges, but the history of ice‐sheet dynamics in this region remains poorly constrained due to limited well‐dated geological records.
Huang Huang, Yuanyang Hu, Marcus Gutjahr, Florian Kirsch, Lijuan Lu, Jianjun Zou, Xuefa Shi, Michael Bollen, Jimin Yu, Gerhard Kuhn   +9 more
wiley   +1 more source

Influence of increasing surface melt over decadal timescales on land-terminating Greenland-type outlet glaciers

Journal of Glaciology, 2018
Over recent decades, Greenland ice sheet surface melt has shown an increase both in intensity and spatial extent. Part of this water probably reaches the bed and can enhance glacier speed, advecting a larger volume of ice into the ablation area.
OLIVIER GAGLIARDINI, MAURO A. WERDER
doaj   +1 more source

The Devil Lake pothole (Ontario): Evidence of subglacial fluvial processes [PDF]

Géographie physique et Quaternaire, 2002
A pothole 1.93 m deep and 1.3 m maximum diameter is located near the crest of a ridge that forms one arm of an eroded anticline in para-gneiss of the Precambrian Shield in southeastern Ontario. It's position on high ground in a region of more than 100 m relief on the bed rock precludes its formation by modern subaerial stream flow or by streams that ...
openaire   +1 more source

Solute sources and geochemical processes in Subglacial Lake Whillans, West Antarctica [PDF]

Geology, 2016
Subglacial Lake Whillans (SLW), West Antarctica, located beneath 800 m of ice is an active component of the subglacial hydrological network. The fill and drain behavior of SLW leads to long (years - decades) water residence times. Here, we present the aqueous geochemistry of the SLW water column and porewaters from a 36 cm sediment core.
Alexander B Michaud, Mark L Skidmore, Andrew C Mitchell, Trista J VickMajors, Carlo Barbante, Clara Turetta, Will vanGelder, John C Priscu   +7 more
openaire   +3 more sources

Adaptation to extreme environments: A review of Antarctic fish physiology

Journal of Fish Biology, EarlyView.
Abstract Having evolved in the chronically cold and thermally stable waters of the Southern Ocean (SO) for millions of years, Antarctic fish possess a suite of physiological specializations that enable them to survive at temperatures near the freezing point of seawater. Adaptations include the evolution of antifreeze proteins, modifications of membrane
Seungyeon Lee, Sachithra Amarin Hettiarachchi, Il‐Chan Kim, Jae‐Seong Lee, Thomas Desvignes, Julia M. York, Laura Ghigliotti, Jilda Alicia Caccavo, Jin‐Hyoung Kim   +8 more
wiley   +1 more source

Characterization of seismicity from different glacial bed types: machine learning classification of laboratory stick-slip acoustic emissions

Annals of Glaciology
Subglacial seismicity presents the opportunity to monitor inaccessible glacial beds at the epicentral location and time. Glaciers can be underlain by rock or till, a first order control on bed mechanics.
Seth Saltiel, Nathan Groebner, Theresa Sawi, Christine McCarthy   +3 more
doaj   +1 more source

Modeling saline-fluid flow through subglacial channels [PDF]

The Cryosphere
Subglacial hydrological systems impact ice dynamics, biological environments, and sediment transport. Previous numerical models of channelized subglacial flow have focused on freshwater in temperate ice without considering variable fluid chemistry and ...
A. Jenson, A. Jenson, M. Skidmore, L. Beem, M. Truffer, S. McCalla   +5 more
doaj   +1 more source

Reactivation of a Subglacial Channel Around the Grounding Zone of Roi Baudouin Ice Shelf, Antarctica

Geophysical Research Letters
Subglacial water beneath the Antarctic Ice Sheet is often funneled via subglacial channels, which inject freshwater into ice‐shelf cavities where it interacts with ocean water.
Yan Zhou, Steven Franke, Thomas Kleiner, Reinhard Drews, Angelika Humbert, Daniela Jansen, Daniel Steinhage, Olaf Eisen   +7 more
doaj   +1 more source

Fracture and Calving Front Evolution: A Case Study of Fimbul Ice Shelf, Antarctica

Proceedings in Applied Mathematics and Mechanics, Volume 26, Issue 4, December 2026.
ABSTRACT This study combines historical records, satellite remote sensing data, and inverse modelling to investigate crack formation and calving front evolution of the Fimbul Ice Shelf, Antarctica. Historical maps from the 1950s, together with satellite imagery from 1970s–2026, are used to reconstruct calving‐front positions and track the evolution of ...
Angelika Humbert, Lea‐Sophie Höyns, Sebastian Skatulla, Moreblessings Shoko, Patroba Odera, Alex Yumbu, Bhooshay Dookee, Dana Floricioiu, Rabea Sondershaus, Ralf Müller   +9 more
wiley   +1 more source

Best Practices in Open and Reproducible Antarctic Marine Sediment Core Research

Perspectives of Earth and Space Scientists, Volume 7, Issue 1, December 2026.
Abstract Marine sediment cores from Antarctica are archived by national programs for reuse and resampling by future researchers, creating a resourceful way to conduct Antarctic science. With reduced budgets to conduct Antarctic field work and to collect new sediment cores offshore of the icy continent, the accessibility of these archived cores and ...
L. E. Miller, R. A. Venturelli, L. O. Prothro, N. Varela, M. Szemak, J. Ruggiero, A. Vega‐González, A. P. Lepp, V. Stanley, K. Vadman, C. Fritz, K. Tinto, F. Nitsche   +12 more
wiley   +1 more source