Results 1 to 10 of about 8,984 (223)

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   +6 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

Biogeochemical and historical drivers of microbial community composition and structure in sediments from Mercer Subglacial Lake, West Antarctica [PDF]

ISME Communications, 2023
Ice streams that flow into Ross Ice Shelf are underlain by water-saturated sediments, a dynamic hydrological system, and subglacial lakes that intermittently discharge water downstream across grounding zones of West Antarctic Ice Sheet (WAIS).
Christina L. Davis, Ryan A. Venturelli, Alexander B. Michaud, Jon R. Hawkings, Amanda M. Achberger, Trista J. Vick-Majors, Brad E. Rosenheim, John E. Dore, August Steigmeyer, Mark L. Skidmore, Joel D. Barker, Liane G. Benning, Matthew R. Siegfried, John C. Priscu, Brent C. Christner, the SALSA Science Team   +15 more
doaj   +2 more sources

Physiological Ecology of Microorganisms in Subglacial Lake Whillans. [PDF]

Front Microbiol, 2016
Subglacial microbial habitats are widespread in glaciated regions of our planet. Some of these environments have been isolated from the atmosphere and from sunlight for many thousands of years. Consequently, ecosystem processes must rely on energy gained from the oxidation of inorganic substrates or detrital organic matter.
Vick-Majors TJ, Mitchell AC, Achberger AM, Christner BC, Dore JE, Michaud AB, Mikucki JA, Purcell AM, Skidmore ML, Priscu JC, WISSARD Science Team.   +10 more
europepmc   +5 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

Subglacial lake drainage detected beneath the Greenland ice sheet. [PDF]

Nat Commun, 2015
The contribution of the Greenland ice sheet to sea-level rise has accelerated in recent decades. Subglacial lake drainage events can induce an ice sheet dynamic response—a process that has been observed in Antarctica, but not yet in Greenland, where the ...
Palmer S, McMillan M, Morlighem M.
europepmc   +3 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

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