Results 1 to 10 of about 2,309 (175)

An integrated Structure-from-Motion and time-lapse technique for quantifying ice-margin dynamics [PDF]

Journal of Glaciology, 2017
Fine resolution topographic data derived from methods such as Structure from Motion (SfM) and Multi-View Stereo (MVS) have the potential to provide detailed observations of geomorphological change, but have thus far been limited by the logistical ...
JOSEPH MALLALIEU, JONATHAN L. CARRIVICK, DUNCAN J. QUINCEY, MARK W. SMITH, WILLIAM H.M. JAMES   +4 more
doaj   +3 more sources

Ice drilling on Skytrain Ice Rise and Sherman Island, Antarctica

Annals of Glaciology, 2021
To understand the long-term climate and glaciological evolution of the ice sheet in the region bordering the Weddell Sea, the British Antarctic Survey has undertaken a series of successful ice core projects drilling to bedrock on Berkner Island, James ...
Robert Mulvaney, Julius Rix, Scott Polfrey, Mackenzie Grieman, Carlos Martìn, Christoph Nehrbass-Ahles, Isobel Rowell, Rebecca Tuckwell, Eric Wolff   +8 more
doaj   +1 more source

On the use of heated needle probes for measuring snow thermal conductivity

Journal of Glaciology, 2022
Heated needle probes provide the most convenient method to measure snow thermal conductivity. Recent studies have suggested that this method underestimates snow thermal conductivity; however the reasons for this discrepancy have not been elucidated.
Kévin Fourteau, Pascal Hagenmuller, Jacques Roulle, Florent Domine   +3 more
doaj   +1 more source

Continuous flow analysis methods for sodium, magnesium and calcium detection in the Skytrain ice core

Journal of Glaciology, 2022
Dissolved and particulate sodium, magnesium and calcium are analyzed in ice cores to determine past changes in sea ice extent, terrestrial dust variability and atmospheric aerosol transport efficiency.
Mackenzie M. Grieman, Helene M. Hoffmann, Jack D. Humby, Robert Mulvaney, Christoph Nehrbass-Ahles, Julius Rix, Elizabeth R. Thomas, Rebecca Tuckwell, Eric W. Wolff   +8 more
doaj   +1 more source

Towards the development of an automated electrical self-potential sensor of melt and rainwater flow in snow

Journal of Glaciology, 2022
To understand snow structure and snowmelt timing, information about flows of liquid water within the snowpack is essential. Models can make predictions using explicit representations of physical processes, or through parameterization, but it is difficult
Alex Priestley, Bernd Kulessa, Richard Essery, Yves Lejeune, Erwan Le Gac, Jane Blackford   +5 more
doaj   +1 more source

Bayesian calibration of an avalanche model from autocorrelated measurements along the flow: application to velocities extracted from photogrammetric images

Journal of Glaciology, 2020
Physically-based avalanche propagation models must still be locally calibrated to provide robust predictions, e.g. in long-term forecasting and subsequent risk assessment.
María Belén Heredia, Nicolas Eckert, Clémentine Prieur, Emmanuel Thibert   +3 more
doaj   +1 more source

Antarctic subglacial drilling rig: Part IV. Electrical and electronic control system

Annals of Glaciology, 2021
In many cases, the efficiency and safety of a drilling project depend on the reliability of the electrical and electronic control system, as the process progresses without visual access of the operator.
Nan Zhang, Pavel Talalay, Jingbiao Liu, Xiaopeng Fan, Qingpeng Kong, Haibin Yu, Yunchen Liu, Benkun Liu, Da Gong, Xingchen Li, Wei Wu, Jialin Hong, Mikhail Sysoev   +12 more
doaj   +1 more source

Development of a clean hot water drill to access Subglacial Lake CECs, West Antarctica

Annals of Glaciology, 2021
Recent drilling successes on Rutford Ice Stream in West Antarctica demonstrate the viability of hot water drilling subglacial access holes to depths >2000 m.
Keith Makinson, Paul G. D. Anker, Jonathan Garcés, David J. Goodger, Scott Polfrey, Julius Rix, Alejandro Silva, Andrew M. Smith, José A. Uribe, Rodrigo Zamora   +9 more
doaj   +1 more source

Cryoegg: development and field trials of a wireless subglacial probe for deep, fast-moving ice

Journal of Glaciology, 2021
Subglacial hydrological systems require innovative technological solutions to access and observe. Wireless sensor platforms can be used to collect and return data, but their performance in deep and fast-moving ice requires quantification.
Michael R. Prior-Jones, Elizabeth A. Bagshaw, Jonathan Lees, Lindsay Clare, Stephen Burrow, Mauro A. Werder, Nanna B. Karlsson, Dorthe Dahl-Jensen, Thomas R. Chudley, Poul Christoffersen, Jemma L. Wadham, Samuel H. Doyle, Bryn Hubbard   +12 more
doaj   +1 more source

Tracking coarse sediment in an Alpine subglacial channel using radio-tagged particles

Journal of Glaciology, 2023
We present a method for tracking radio-tagged pebbles and cobbles through subglacial meltwater channels under shallow temperate glaciers. Natural particles tagged with active radio transmitters were injected directly into a large subglacial channel 300 m
Matt Jenkin, Margaux Hofmann, Bryn Hubbard, Davide Mancini, Floreana M. Miesen, Frédéric Herman, Stuart N. Lane   +6 more
doaj   +1 more source