Results 1 to 10 of about 708,716 (215)

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 ...
Da Gong, Xiaopeng Fan, Yazhou Li, Bing Li, Nan Zhang, Raphael Gromig, Emma C. Smith, Wolf Dummann, Sophie Berger, Olaf Eisen, Jan Tell, Boris K. Biskaborn, Nikola Koglin, Frank Wilhelms, Benjamin Broy, Yunchen Liu, Yang Yang, Xingchen Li, An Liu, Pavel Talalay   +19 more
doaj   +4 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
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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.
Alicia M Purcell, Jill A Mikucki, Amanda eAchberger, Irina eAlekhina, Carlo eBarbante, Brent Craig Christner, Dhritiman eGhosh, Alexander B Michaud, Andrew C Mitchell, John C Priscu, Reed eScherer, Mark eSkidmore, Trista J Vick-Majors, The WISSARD eScience Team   +13 more
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Distribution of subglacial sediments across the Wilkes Subglacial Basin, East Antarctica [PDF]

Journal of Geophysical Research: Earth Surface, 2016
AbstractTopography, sediment distribution, and heat flux are all key boundary conditions governing the dynamics of the East Antarctic Ice Sheet (EAIS). EAIS stability is most at risk in Wilkes Land across vast expanses of marine‐based catchments including the 1400 km × 600 km expanse of the Wilkes Subglacial Basin (WSB) region.
Frederick, Bruce C., Young, Duncan A., Blankenship, Donald D., Richter, Thomas G., Kempf, Scott D., Ferraccioli, Fausto, Siegert, Martin J.   +6 more
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Sink or source? Methane and carbon dioxide emissions from cryoconite holes, subglacial sediments, and proglacial river runoff during intensive glacier melting on the Tibetan Plateau

Fundamental Research, 2021
High Mountain Asia glaciers are currently ignored in the estimation of global greenhouse gas budgets (e.g., methane (CH4) and carbon dioxide (CO2)). Similar to the Asian Water Tower and Third Pole, the Tibetan Plateau (TP) hosts the largest volume of ...
Yulan Zhang, Shichang Kang, Da Wei, Xi Luo, Zhuangzhuang Wang, Tanguang Gao   +5 more
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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
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Scientific access into Mercer Subglacial Lake: scientific objectives, drilling operations and initial observations

Annals of Glaciology, 2021
The Subglacial Antarctic Lakes Scientific Access (SALSA) Project accessed Mercer Subglacial Lake using environmentally clean hot-water drilling to examine interactions among ice, water, sediment, rock, microbes and carbon reservoirs within the lake water
John C. Priscu, Jonas Kalin, John Winans, Timothy Campbell, Matthew R. Siegfried, Mark Skidmore, John E. Dore, Amy Leventer, David M. Harwood, Dennis Duling, Robert Zook, Justin Burnett, Dar Gibson, Edward Krula, Anatoly Mironov, Jim McManis, Graham Roberts, Brad E. Rosenheim, Brent C. Christner, Kathy Kasic, Helen A. Fricker, W. Berry Lyons, Joel Barker, Mark Bowling, Billy Collins, Christina Davis, Al Gagnon, Christopher Gardner, Chloe Gustafson, Ok-Sun Kim, Wei Li, Alex Michaud, Molly O. Patterson, Martyn Tranter, Ryan Venturelli, Trista Vick-Majors, Cooper Elsworth   +36 more
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Sediment behavior controls equilibrium width of subglacial channels [PDF]

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
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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
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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
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