Results 91 to 100 of about 2,939 (220)

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

A Vast Valley Network Beneath the Greenland Ice Sheet

Geophysical Research Letters, Volume 53, Issue 13, 16 July 2026.
Abstract Mapping subglacial topography along the margin of the Greenland Ice Sheet was revolutionized by reconciling measurements of ice thickness and surface velocity using the principle of mass conservation. Despite evidence that many subglacial valleys resolved by that method extend upstream, it cannot be applied to the ice sheet's slower‐flowing ...
Allison M. Chartrand, Joseph A. MacGregor, Mathieu Morlighem, Olga V. Sergienko, Helen Ockenden, William T. Colgan, Gong Cheng   +6 more
wiley   +1 more source

Quantifying subglacial roughness and its link to glacial geomorphology and ice speed [PDF]

, 2013
The shape of subglacial bed topography, termed its roughness, is a recognised control on basal ice-flow. Although glaciologists have observed patterns of variations in ice speed over beds with different roughness values, the strength of this relationship
PRESCOTT, PHILIP,WILLIAM
core  

Coarse Sediment Transport in a Near‐Terminus Subglacial Channel

Geophysical Research Letters, Volume 53, Issue 13, 16 July 2026.
Abstract We present the first large‐sample, spatially resolved measurements of coarse sediment transport within a subglacial meltwater channel. We released 324 radio‐tagged pebbles into a near‐terminus channel of Glacier d’Otemma, Switzerland, and monitored their positions through 10–50 m of ice during the mid to late melt season.
Matt Jenkin, Davide Mancini, Floreana Miesen, Bryn Hubbard, Margaux Hofmann, Stuart N. Lane   +5 more
wiley   +1 more source

Image analysis techniques to estimate river discharge using time-lapse cameras in remote locations [PDF]

, 2015
Cameras have the potential to provide new data streams for environmental science. Improvements in image quality, power consumption and image processing algorithms mean that it is now possible to test camera-based sensing in real-world scenarios.
Martinez, Kirk, Kirk Martinez, Hart, Jane K., Jane K. Hart, Young, David S., David S. Young   +5 more
core   +1 more source

Early deglaciation history of the southeastern Baffin Island shelf (Eastern Canadian Arctic Archipelago)

Journal of Quaternary Science, Volume 41, Issue 5, Page 686-701, July 2026.
ABSTRACT During the last glacial period, the Laurentide Ice Sheet (LIS) was the largest terrestrial ice sheet on Earth. Its evolution since the Last Glacial Maximum profoundly influenced Earth's geodynamics and surface processes. Investigating the past dynamics of the LIS provides critical insights into how contemporary ice sheets may respond to ...
Alexis P. Belko, Alexandre Normandeau, Patrick Lajeunesse, Audrey Limoges   +3 more
wiley   +1 more source

Deglaciation of the Burren glacio‐karst, western Ireland, during Termination 1: Implications for North Atlantic climate and karstification

Journal of Quaternary Science, Volume 41, Issue 5, Page 702-715, July 2026.
ABSTRACT The Burren uplands in western Ireland form one of the most extensive and best‐preserved examples of glacio‐karst in Europe. Subsumed by the Irish ice sheet during the Late Pleistocene, granite erratic boulders and in situ silica veins in the limestone bedrock provide a rare opportunity to reconstruct the timing and rate of deglaciation ...
Gordon Bromley, Colin Bunce, Brenda Hall, Aaron Putnam, Frank McDermott   +4 more
wiley   +1 more source

Stress Redistribution Explains Anti-correlated Subglacial Pressure Variations [PDF]

, 2018
We used a finite element model to interpret anti-correlated pressure variations at the base of a glacier to demonstrate the importance of stress redistribution in the basal ice.
Olivier Gagliardini, Gaute Lappegard, Lappegard, Gaute, Miriam Jackson, Lefeuvre, Pierre-Marie, Pierre-Marie Lefeuvre, Jon Ove Hagen, Hagen, Jon Ove, Gagliardini, Olivier, Thomas Zwinger, Jackson, Miriam, Zwinger, Thomas   +11 more
core   +1 more source

The Glacial Legacy of the Geneva Basin: Morphology and implications of an intricate tunnel valley system revealed from 3D seismic data

Journal of Quaternary Science, Volume 41, Issue 5, Page 732-753, July 2026.
ABSTRACT Like other perialpine basins and glaciated margins, the Geneva Basin in SW Switzerland is characterised by buried tunnel valleys, which are elongated incisions widely attributed to subglacial meltwater erosion beneath continental ice sheets. However, an inclusive understanding of the geological control on the evolution of the glacial landscape
Ovie Emmanuel Eruteya, Emna Meftah, Andrea Moscariello   +2 more
wiley   +1 more source

Former dynamic behaviour of a cold-based valley glacier on Svalbard revealed by basal ice and structural glaciology investigations [PDF]

, 2015
H.L. was funded by a UK Natural Environment Research Council (NERC) PhD studentship (NE/I528050/1), the Queen Mary Postgraduate Research Fund, and an Arctic Field Grant from the Research Council of Norway. E.J.F.
Hubbard, Bryn, Benn, D.I., Hubbard, B., Lovell, Harold, Lovell, H., Fleming, E.J., Lukas, S., Fleming, Edward J., Lukas, Sven, Naegeli, K., Benn, Douglas I., Naegeli, Kathrin   +11 more
core   +2 more sources