Results 41 to 50 of about 256 (175)

Flow‐pattern evolution of the Scandinavian Ice Sheet indicated by the subglacial lineation record over Norway, Sweden and Finland

Boreas, EarlyView.
We present a 25‐stage reconstruction of the ice‐flow pattern evolution of the Scandinavian Ice Sheet based on mapping and analysis of ~240 000 subglacial lineations and lineation fields across Norway, Sweden, Finland, and parts of NW Russia. Our reconstruction uses a glacial geomorphological inversion approach, in which we generated 611 individual ...
Frances E. G. Butcher, Anna L. C. Hughes, Helen E. Dulfer, Christopher D. Clark, Jeremy C. Ely, Emma L. M. Lewington, Benjamin M. Boyes, Alex C. Scoffield, Stephen Howcutt, Christiaan R. Diemont   +9 more
wiley   +1 more source

Acquisition of a 3 min, two-dimensional glacier velocity field with terrestrial radar interferometry

Journal of Glaciology, 2017
Outlet glaciers undergo rapid spatial and temporal changes in flow velocity during calving events. Observing such changes requires both high temporal and high spatial resolution methods, something now possible with terrestrial radar interferometry. While
DENIS VOYTENKO, TIMOTHY H. DIXON, DAVID M. HOLLAND, RYAN CASSOTTO, IAN M. HOWAT, MARK A. FAHNESTOCK, MARTIN TRUFFER, SANTIAGO DE LA PEÑA   +7 more
doaj   +1 more source

Thorncliffe Formation: A proglacial to subglacial lacustrine basin sequence, Greater Toronto Region, Canada

Boreas, EarlyView.
Map of Lower sediment (LS) thickness is a surrogate for the distribution of Thorncliffe Formation (TF) and ~75% of TF thickness from the slope of Niagara Escarpment east to Brighton. Inset images show the LS sequence at the Don Valleys brickyards (DVBY) and undeformed TF sand and gravel (~15 m) below Newmarket Till (NT) at sites L and Co.
David R. Sharpe, Charles E. Logan, Ross D. Knight, Andre J.‐M. Pugin   +3 more
wiley   +1 more source

Instruments and Methods: An Effective Pressure Room Seal in Ice

, 1965
Several methods were tried to seal a room in ice which could be pressurized to the overburden pressure of the ice. We found that a keyed bulkhead consisting of two ice walls with an in-place frozen mixture of water, clay and styrofoam pellets between ...
G. E. H. Ballard, R. O. Ramseier
core   +1 more source

Estimating the elastic modulus of landfast ice from wave observations

Journal of Glaciology, 2023
Progress in our understanding of wave–ice interactions is currently hindered by the lack of in situ observations and information of sea-ice properties, including the elastic modulus.
Joey J. Voermans, Jean Rabault, Aleksey Marchenko, Takehiko Nose, Takuji Waseda, Alexander V. Babanin   +5 more
doaj   +1 more source

Weichselian history of the Fennoscandian Ice Sheet centre, Kvarken archipelago, western Finland—flow shifts, thermal regime and deglaciation

Boreas, EarlyView.
Rapid thaw of the Earth's cryosphere in response to anthropogenic warming highlights the need to identify and understand the contrasting signatures of past ice‐sheet stability and collapse. The Kvarken archipelago, western Finland, at the centre of the former Fennoscandian Ice Sheet (FIS), has been designated a UNESCO World Heritage site in recognition
Niko Putkinen, Tapani Tervo, Adrian M. Hall, Juha P. Lunkka, Pertti Sarala, Olli Breilin, Jari Nenonen   +6 more
wiley   +1 more source

Climate Warming and Ice Weakening Trigger Alpine Glacier Collapses: The Marmolada Case

Geophysical Research Letters, Volume 53, Issue 11, 16 June 2026.
Abstract The rapid retreat of temperate mid‐latitude glaciers due to global warming causes dramatic mass loss and increases their instability. Using a synthesis of thermodynamic and mechanical laws, we constructed a three‐dimensional stability model and applied it in the analysis of the collapse of a portion of the Marmolada Glacier in northeastern ...
Carlo Baroni, Chiara Frassi, Maria Cristina Salvatore, Nicola M. Pugno, Luca Carturan, Andrea Berton, Alberto Bellin   +6 more
wiley   +1 more source

Direct measurement of optical properties of glacier ice using a photon-counting diffuse LiDAR

Journal of Glaciology, 2022
The production of meltwater from glacier ice, which is exposed at the margins of land ice during the summer, is responsible for a large proportion of glacier mass loss.
Markus Allgaier, Matthew G. Cooper, Anders E. Carlson, Sarah W. Cooley, Jonathan C. Ryan, Brian J. Smith   +5 more
doaj   +1 more source

The Influence of Sea Ice and Ice Mélange on Outlet Glacier Dynamics in the Arctic and Antarctic: Recent Progress and Future Challenges

Reviews of Geophysics, Volume 64, Issue 2, June 2026.
Abstract Sea ice is situated close to the termini of many outlet glaciers in the Arctic and Antarctic and has the potential to influence their dynamics and, therefore, their contribution to sea level rise. However, the nature, prevalence, and ice‐dynamic significance of sea ice‐glacier interactions remains subject to several open questions.
Katherine A. Deakin, Chris R. Stokes, Stewart S. R. Jamieson, J. Rachel Carr   +3 more
wiley   +1 more source

Instruments and Methods - A novel method for obtaining very large ancient air samples from ablating glacial ice for analyses of methane radiocarbon

, 2008
We present techniques for obtaining large (similar to 100 L STP) samples of ancient air for analysis of C-14 of methane ((CH4)-C-14) and other trace constituents.
Lowe, Dave, Harth, Christina M., Lowe, DC, Smith, Andrew M., Severinghaus, Jeffrey P., Headly, M, Severinghaus, JP, Schaefer, H, Weiss, RF, Weiss, Ray F., Muhle, J, Petrenko, Vasilii V., Reeh, N, Schaefer, Hinrich, Brook, EJ, Brook, Edward J., Reeh, Niels, Muhle, Jens, Headly, Melissa, Harth, CM, Smith, AM, Petrenko, VV   +21 more
core   +1 more source