Results 41 to 50 of about 19,515,932 (251)

Thirteen years of subglacial lake activity in Antarctica from multi-mission satellite altimetry

Annals of Glaciology, 2018
The ability to detect the surface expression of moving water beneath the Antarctic ice sheet by satellite has revealed a dynamic basal environment, with implications for regional ice dynamics, grounding-line stability, and fluxes of freshwater and ...
Matthew R. Siegfried, Helen A. Fricker
doaj   +1 more source

Subglacial Freshwater Drainage Increases Simulated Basal Melt of the Totten Ice Shelf

Geophysical Research Letters, 2023
Subglacial freshwater discharge from beneath Antarctic glaciers likely has a strong impact on ice shelf basal melting. However, the difficulty in directly observing subglacial flow highlights the importance of modeling these processes.
David E. Gwyther, Christine F. Dow, Stefan Jendersie, Noel Gourmelen, Benjamin K. Galton‐Fenzi   +4 more
doaj   +1 more source

Characterization of subglacial landscapes by a two-parameter roughness index [PDF]

, 2010
Peer reviewedPublisher ...
Bingham, Robert George, Bo, Sun, Cui, Xiangbin, Siegert, Martin J., Tang, Xueyuan, Xin, Li, Zhang, Dong, Zhang, Xiangpei   +7 more
core   +2 more sources

Modeling oscillations in connected glacial lakes

Journal of Glaciology, 2019
Mountain glaciers and ice sheets often host marginal and subglacial lakes that are hydraulically connected through subglacial drainage systems. These lakes exhibit complex dynamics that have been the subject of models for decades.
Aaron G. Stubblefield, Timothy T. Creyts, Jonathan Kingslake, Marc Spiegelman   +3 more
doaj   +1 more source

Meteoric 10Be as a tracer of subglacial processes and interglacial surface exposure in Greenland

Quaternary Science Reviews, 2018
In order to test whether sediment emerging from presently glaciated areas of Greenland was exposed near or at Earth's surface during previous interglacial periods, we measured the rare isotope 10Be contained in grain coatings of sediment collected at ...
J. Graly, L. Corbett, P. Bierman, A. Lini, T. Neumann   +4 more
semanticscholar   +1 more source

Ice sheets as a significant source of highly reactive nanoparticulate iron to the oceans [PDF]

, 2014
The Greenland and Antarctic Ice Sheets cover ~\n10% of global land surface, but are rarely considered as active components of the global iron cycle. The ocean waters around both ice sheets harbour highly productive coastal ecosystems, many of which are ...
Benning, Liane G., Hawkings, Jon R., Lee, Katherine, Nienow, Peter, Raiswell, Rob, Statham, Peter J., Tedstone, Andrew, Telling, Jon, Tranter, Martyn, Wadham, Jemma L.   +9 more
core   +2 more sources

Sediment behavior controls equilibrium width of subglacial channels

Journal of Glaciology, 2017
Flow-frictional resistance at the base of glaciers and ice sheets is strongly linked to subglacial water pressure. Understanding the physical mechanisms that govern meltwater fluxes in subglacial channels is hence critical for constraining variations in ...
ANDERS DAMSGAARD, JENNY SUCKALE, JAN A. PIOTROWSKI, MORGANE HOUSSAIS, MATTHEW R. SIEGFRIED, HELEN A. FRICKER   +5 more
doaj   +1 more source

Subglacial processes on an Antarctic ice stream bed. 2: Can modelled ice dynamics explain the morphology of mega-scale glacial lineations?

Journal of Glaciology, 2016
Mega-scale glacial lineations (MSGLs) are highly elongate subglacial bedforms associated with ice streaming. However, the link between MSGLs and rapid ice flow is largely qualitative, and there have been few attempts to quantitatively link their ...
S. Jamieson, C. Stokes, S. Livingstone, A. Vieli, C. Ó Cofaigh, C. Hillenbrand, M. Spagnolo   +6 more
semanticscholar   +1 more source

Quantification of turbate microstructures through a subglacial till : dimensions and characteristics [PDF]

, 2014
Peer reviewedPublisher ...
Lea, James M., Palmer, Adrian
core   +2 more sources

Water blister geomorphology and subglacial drainage sediments: an example from the bed of the Fennoscandian Ice Sheet in SW Finland

Journal of Glaciology, 2023
This study presents the first light detection and ranging (LiDAR)-based morphometric description of a water blister from a past ice-sheet bed caused by rapid supraglacial drainage.
Joni Mäkinen, Christine F. Dow, Elina Ahokangas, Antti Ojala, Kari Kajuutti, Juulia Kautto, Jukka-Pekka Palmu   +6 more
doaj   +1 more source