Results 1 to 10 of about 2,018 (207)

Coring of Antarctic Subglacial Sediments [PDF]

Journal of Marine Science and Engineering, 2019
Coring sediments in subglacial aquatic environments offers unique opportunities for research on paleo-environments and paleo-climates because it can provide data from periods even earlier than ice cores, as well as the overlying ice histories ...
Olaf Eisen, Pavel Talalay, Emma Smith
exaly   +9 more sources

Microbial sulfur transformations in sediments from Subglacial Lake Whillans [PDF]

Frontiers in Microbiology, 2014
Diverse microbial assemblages inhabit subglacial aquatic environments. While few of these environments have been sampled, data reveal that subglacial organisms gain energy for growth from reduced minerals containing nitrogen, iron, and sulfur.
Alexander Michaud, Amanda Achberger, John Priscu   +2 more
exaly   +7 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   +8 more sources

Hard rocks and deep wetlands beneath Thwaites Glacier in Antarctica [PDF]

Communications Earth & Environment
Thwaites Glacier in West Antarctica is losing ice rapidly and is considered especially vulnerable to retreat, but predictions of its future remain limited by uncertainties about its subglacial properties.
Ole Zeising, Olaf Eisen, Coen Hofstede, Ronan Agnew, Alex Brisbourne, Andrew O. Hoffman, Sridhar Anandakrishnan, On behalf of the GHOST Team   +7 more
doaj   +2 more sources

Genetic isolation and metabolic complexity of an Antarctic subglacial microbiome [PDF]

Nature Communications
Microbes inhabiting and evolving in aquatic ecosystems beneath polar ice sheets subsist under energy-limited conditions while in relative isolation from surface gene pools and their common ancestral populations of origin.
Kyung Mo Kim, Kyuin Hwang, Hanbyul Lee, Ahnna Cho, Christina L. Davis, Brent C. Christner, John C. Priscu, Ok-Sun Kim   +7 more
doaj   +2 more sources

Review article: Existing and potential evidence for Holocene grounding line retreat and readvance in Antarctica [PDF]

The Cryosphere, 2022
Widespread existing geological records from above the modern ice sheet surface and outboard of the current ice margin show that the Antarctic Ice Sheet (AIS) was much more extensive at the Last Glacial Maximum (∼ 20 ka) than at present.
J. S. Johnson, R. A. Venturelli, G. Balco, C. S. Allen, S. Braddock, S. Campbell, B. M. Goehring, B. L. Hall, P. D. Neff, K. A. Nichols, D. H. Rood, E. R. Thomas, J. Woodward   +12 more
doaj   +1 more source

Complex genesis of N-channel eskers illustrated with the example of an esker near Tosie (east-central Poland)

Acta Universitatis Lodziensis. Folia Geographica Physica, 2021
The study presents the problem of complex genesis of eskers formed in N-channels on the example of an esker located near Tosie in east-central Poland.
Małgorzata Frydrych
doaj   +1 more source

Subglacial hydrology from high-resolution ice-flow simulations of the Rhine Glacier during the Last Glacial Maximum: a proxy for glacial erosion [PDF]

Eiszeitalter und Gegenwart, 2023
At the Last Glacial Maximum (LGM), the Rhine Glacier complex (Rhine and Linth glaciers) formed large piedmont lobes extending north into the Swiss and German Alpine forelands. Numerous overdeepened valleys there were formed by repeated glaciations.
D. Cohen, D. Cohen, G. Jouvet, G. Jouvet, T. Zwinger, A. Landgraf, U. H. Fischer   +6 more
doaj   +1 more source

Ice stream subglacial access for ice-sheet history and fast ice flow: the BEAMISH Project on Rutford Ice Stream, West Antarctica and initial results on basal conditions

Annals of Glaciology, 2021
Three holes were drilled to the bed of Rutford Ice Stream, through ice up to 2154 m thick, to investigate the basal processes and conditions associated with fast ice flow and the glacial history of the West Antarctic Ice Sheet.
A. M. Smith, P. G. D. Anker, K. W. Nicholls, K. Makinson, T. Murray, S. Rios-Costas, A. M. Brisbourne, D. A. Hodgson, R. Schlegel, S. Anandakrishnan   +9 more
doaj   +1 more source

Radar sounding survey over Devon Ice Cap indicates the potential for a diverse hypersaline subglacial hydrological environment [PDF]

The Cryosphere, 2022
Prior geophysical surveys provided evidence for a hypersaline subglacial lake complex beneath the center of Devon Ice Cap, Canadian Arctic; however, the full extent and characteristics of the hydrological system remained unknown due to limited data ...
A. Rutishauser, A. Rutishauser, D. D. Blankenship, D. D. Blankenship, D. A. Young, N. S. Wolfenbarger, L. H. Beem, M. L. Skidmore, A. Dubnick, A. S. Criscitiello   +9 more
doaj   +1 more source