Results 61 to 70 of about 832 (174)

The feasibility of imaging subglacial hydrology beneath ice streams with ground-based electromagnetics

Journal of Glaciology, 2017
Subglacial hydrologic systems in Antarctica and Greenland play a fundamental role in ice-sheet dynamics, yet critical aspects of these systems remain poorly understood due to a lack of observations.
KERRY KEY, MATTHEW R. SIEGFRIED
doaj   +1 more source

Modelling subglacial fluvial sediment transport with a graph-based model, Graphical Subglacial Sediment Transport (GraphSSeT)

The Cryosphere
Abstract. A quantitative understanding of how sediment discharge from subglacial fluvial systems varies in response to glaciohydrological conditions is essential for understanding marine systems around Greenland and Antarctica and for interpreting sedimentary records of cryosphere evolution.
A. R. A. Aitken, A. R. A. Aitken, I. Delaney, G. Pirot, G. Pirot, M. A. Werder, M. A. Werder   +6 more
openaire   +6 more sources

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

Potential Activity of Subglacial Microbiota Transported to Anoxic River Delta Sediments [PDF]

Microbial Ecology, 2017
The Watson River drains a portion of the SW Greenland ice sheet, transporting microbial communities from subglacial environments to a delta at the head of Søndre Strømfjord. This study investigates the potential activity and community shifts of glacial microbiota deposited and buried under layers of sediments within the river delta.
Cameron, Karen A., Stibal, Marek, Olsen, Nikoline S., Mikkelsen, Andreas B., Elberling, Bo, Jacobsen, Carsten S.   +5 more
openaire   +5 more sources

Quantifying Ice‐Sheet Derived Lead (Pb) Fluxes to the Ocean; A Case Study at Nioghalvfjerdsbræ

Geophysical Research Letters, 2022
Concentrations of the toxic element lead (Pb) are elevated in seawater due to historical emissions. While anthropogenic atmospheric emissions are the dominant source of dissolved Pb (dPb) to the Atlantic Ocean, evidence is emerging of a natural source ...
Stephan Krisch, Oliver Huhn, Ali Al‐Hashem, Mark J. Hopwood, Pablo Lodeiro, Eric P. Achterberg   +5 more
doaj   +1 more source

Hidden subsurface suspended sediment export from Greenland's marine‐terminating glaciers

Limnology and Oceanography Letters, Volume 11, Issue 6, November 2026.
Abstract Runoff and calved ice volumes from the Greenland Ice Sheet are well constrained, but quantifying the associated suspended sediment flux remains challenging. Here we present near‐terminus observations from three glacierized fjords in southeast Greenland, combining full‐depth turbidity profiles and current velocity from summer 2024 to evaluate ...
Yaqing Ruan, Eric P. Achterberg, Hilde Oliver, Lukas L. Taenzer, Xin Huang, Camilla S. Andresen, Mark J. Hopwood   +6 more
wiley   +1 more source

Subglacial controls on the flow of Institute Ice Stream, West Antarctica

Annals of Glaciology, 2016
The Institute Ice Stream (IIS) rests on a reverse-sloping bed, extending >150 km upstream into the ~1.8 km deep Robin Subglacial Basin, placing it at the threshold of marine ice-sheet instability. Understanding IIS vulnerability has focused on the effect
Martin J. Siegert, Neil Ross, Jilu Li, Dustin M. Schroeder, David Rippin, David Ashmore, Robert Bingham, Prasad Gogineni   +7 more
doaj   +1 more source

Macrofauna Associated With Submarine Groundwater Discharge Sites and a Cold Seep in Svalbard Fjords

Ecology and Evolution, Volume 16, Issue 10, October 2026.
This conceptual model illustrates how the balance between submarine groundwater discharge (SGD), glacimarine sedimentation, and benthic community development may change during glacier retreat in Arctic fjords. In present‐day marine‐terminating systems, high sedimentation and physical disturbance may mask the ecological effects of SGD.
Johanna Schramm, Wei‐Li Hong, Sophie ten Hietbrink, Beata Szymczycha, Jochen Knies, Arunima Sen   +5 more
wiley   +1 more source

Geochronological reconstruction of the Lateglacial deglaciation in the Arve Valley (Northern French Alps)

Journal of Quaternary Science, Volume 41, Issue 7, Page 1020-1035, October 2026.
ABSTRACT The timing and spatial patterns of glaciers retreat in the Northern French Alps during the Lateglacial (19.0–11.7 ka) remain debated, reflecting discrepancies among available chronological data sets. The complex interactions between major glaciers, such as the Rhône and Arve glaciers to the north and the Isère glacier to the south, represent a
Quentin Portal, Christian Crouzet, Jean‐François Buoncristiani, Julien Carcaillet   +3 more
wiley   +1 more source

Evolution of subglacial overdeepenings in response to sediment redistribution and glaciohydraulic supercooling

Journal of Geophysical Research: Earth Surface, 2013
AbstractGlaciers erode bedrock rapidly, but evacuation of sediments requires efficient subglacial drainage networks. If glaciers erode more rapidly than evacuation proceeds, a protective subglacial till layer can form to armor the bed. Where glaciers cross overdeepenings, local closed depressions, the bed slope opposes the ice surface and lowers the ...
Creyts, Timothy T., Clarke, Garry K. C., Church, Michael   +2 more
openaire   +3 more sources