Results 1 to 10 of about 7,235 (213)

Distribution and dynamics of Greenland subglacial lakes [PDF]

Nature Communications, 2019
Subglacial lakes can influence basal hydrology and ice flow in Antarctica, but are poorly constrained in Greenland. Here the authors provide the first ice sheet-wide inventory of subglacial lakes beneath GrIS, including 54 uncharted lakes.
J. S. Bowling, S. J. Livingstone, A. J. Sole, W. Chu   +3 more
doaj   +8 more sources

Subglacial lakes and hydrology across the Ellsworth Subglacial Highlands, West Antarctica [PDF]

The Cryosphere, 2020
Subglacial water plays an important role in ice sheet dynamics and stability. Subglacial lakes are often located at the onset of ice streams and have been hypothesised to enhance ice flow downstream by lubricating the ice–bed interface.
F. Napoleoni, S. S. R. Jamieson, N. Ross, M. J. Bentley, A. Rivera, A. Rivera, A. M. Smith, M. J. Siegert, G. J. G. Paxman, G. J. G. Paxman, G. Gacitúa, J. A. Uribe, R. Zamora, A. M. Brisbourne, D. G. Vaughan   +14 more
doaj   +7 more sources

Constraints on subglacial melt fluxes from observations of active subglacial lake recharge [PDF]

Journal of Glaciology, 2023
Active subglacial lakes provide a rare glimpse of the subglacial environment and hydrological processes at play. Several studies contributed to establishing active subglacial lake inventories and document lake drainage and connection, but few focused on ...
George Malczyk, Noel Gourmelen, Mauro Werder, Martin Wearing, Dan Goldberg   +4 more
doaj   +3 more sources

Detection of 85 new active subglacial lakes in Antarctica from a decade of CryoSat-2 data [PDF]

Nature Communications
Subglacial lake activity influences ice sheet flow, grounding line discharge and ice shelf basal melting. Although 146 active subglacial lakes have been detected in Antarctica via ice surface elevation change associated with their activity, only 36 fill ...
Sally F. Wilson, Anna E. Hogg, Richard Rigby, Noel Gourmelen, Isabel Nias, Thomas Slater   +5 more
doaj   +2 more sources

Estimating effective pressures in active subglacial lakes with ICESat-2 satellite altimetry [PDF]

Journal of Glaciology
The difference between the ice and water pressures, or the effective pressure, influences water flow and sliding at the ice-bed interface. Effective pressure is typically quantified with subglacial hydrology models because direct measurements of the ...
Aaron Stubblefield, Aleah Nicholson Sommers, Colin Meyer, Lauren Cristy Andrews   +3 more
doaj   +2 more sources

Improved monitoring of subglacial lake activity in Greenland [PDF]

The Cryosphere, 2022
Subglacial lakes form beneath ice sheets and ice caps if water is available and if bedrock and surface topography are able to retain the water. On a regional scale, the lakes modulate the timing and rate of freshwater flow through the subglacial system ...
L. Sandberg Sørensen, R. Bahbah, S. B. Simonsen, N. Havelund Andersen, J. Bowling, J. Bowling, N. Gourmelen, N. Gourmelen, A. Horton, N. B. Karlsson, A. Leeson, J. Maddalena, M. McMillan, A. Solgaard, B. Wessel   +14 more
doaj   +7 more sources

Deep clustering in subglacial radar reflectance reveals subglacial lakes [PDF]

The Cryosphere
Ice-penetrating radar (IPR) imaging is a valuable tool for observing the internal structure and bottom of ice sheets. Subglacial water bodies, also known as subglacial lakes, generally appear as distinct, bright, flat, and continuous reflections in IPR ...
S. Dong, S. Dong, S. Dong, S. Dong, L. Fu, X. Tang, X. Tang, Z. Li, X. Chen   +8 more
doaj   +4 more sources

Assessing the subglacial lake coverage of Antarctica [PDF]

Annals of Glaciology, 2016
Lakes beneath the Antarctic Ice Sheet are known to decrease traction at the ice base and therefore can have a great impact on ice dynamics. However, the total extent of Antarctic subglacial lakes is still unknown.
Sebastian Goeller, Daniel Steinhage, Malte Thoma, Klaus Grosfeld   +3 more
doaj   +4 more sources

Evidence for a palaeo-subglacial lake on the Antarctic continental shelf [PDF]

Nature Communications, 2017
While a number of subglacial lakes have been discovered beneath the modern Antarctic ice sheet, little is known regarding their prevalence during past glaciations. Here, Kuhnet al. present sedimentological evidence for an active palaeo-subglacial lake in
Gerhard Kuhn, Claus-Dieter Hillenbrand, Sabine Kasten, James A. Smith, Frank O. Nitsche, Thomas Frederichs, Steffen Wiers, Werner Ehrmann, Johann P. Klages, José M. Mogollón   +9 more
doaj   +4 more sources

Recent advances in understanding Antarctic subglacial lakes and hydrology. [PDF]

Philos Trans A Math Phys Eng Sci, 2016
Siegert MJ, Ross N, Le Brocq AM.
europepmc   +2 more sources