Results 51 to 60 of about 12,531 (254)

Sedimentary Signatures of Persistent Subglacial Meltwater Drainage From Thwaites Glacier, Antarctica

Frontiers in Earth Science, 2022
Subglacial meltwater drainage can enhance localized melting along grounding zones and beneath the ice shelves of marine-terminating glaciers. Efforts to constrain the evolution of subglacial hydrology and the resulting influence on ice stability in space
A. P. Lepp, L. M. Simkins, J. B. Anderson, R. W. Clark, J. S. Wellner, C-D. Hillenbrand, J. A. Smith, A. A. Lehrmann, R. Totten, R. D. Larter, K. A. Hogan, F. O. Nitsche, A. G. C. Graham, L. Wacker   +13 more
doaj   +1 more source

Mechanical forcing of water pressure in a hydraulically isolated reach beneath Western Greenland's ablation zone

Annals of Glaciology, 2016
A suite of surface and basal measurements during and after borehole drilling is used to perform in situ investigation of the local basal drainage system and pressure forcing in western Greenland. Drill and borehole water temperature were monitored during
Toby W. Meierbachtol, Joel T. Harper, Neil F. Humphrey, Patrick J. Wright   +3 more
doaj   +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

Origin and significance of 'dispersed facies' basal ice: Svínafellsjökull, Iceland [PDF]

, 2010
Dispersed facies basal ice - massive (i.e. structureless) ice with dispersed debris aggregates - is present at the margins of many glaciers and, as a product of internal glacial processes, has the potential to provide important information about the ...
Darrel A. Swift, David J. Graham, Evenson, Holdsworth, Knight, Knudsen, Lawson, Nicholas G. Midgley, Robinson, Simon J. Cook, Spedding   +10 more
core   +5 more sources

Warm-based basal sediment entrainment and far-field Pleistocene origin evidenced in central Transantarctic blue ice through stable isotopes and internal structures

Journal of Glaciology, 2018
Stable isotopes of water (δ18O and δ2H) were measured in the debris-laden ice underlying an Antarctic blue ice moraine, and in adjoining Law Glacier in the central Transantarctic Mountains.
JOSEPH A. GRALY, KATHY J. LICHT, CHRISTINE M. KASSAB, BROXTON W. BIRD, MICHAEL R. KAPLAN   +4 more
doaj   +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

Hydrology and dynamics of a polythermal (mostly cold) High Arctic glacier [PDF]

, 2002
Peer reviewedPublisher ...
Andreasen, Bingham, Bingham, Blatter, Blatter, Boon, Boon, Cattle, Copland, Copland, Copland, Dowdeswell, Etzelmüller, Fountain, Hock, Hodson, Hooke, Houghton, Iken, Iken, Iken, Jansson, Kamb, Kavanaugh, Mair, Mair, Manabe, Meier, Modge, Munro, Müller, Nienow, Parizek, Prowse, Rabus, Rippin, Rippin, Skidmore, Wadham, Willis, Willis, Zwally   +41 more
core   +2 more sources

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

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