Results 61 to 70 of about 862,051 (192)

NEW FRONTIERS OF ANTARCTIC SUBGLACIAL LAKES EXPLORATION

Geography, Environment, Sustainability, 2013
Antarctic subglacial aquatic environment have become of great interest to the science community because they may provide unique information about microbial evolution, the past climate of the Earth, and the formation of the Antarctic ice sheet.
Pavel Talalay, Alexey Markov, Mikhail Sysoev   +2 more
doaj   +1 more source

Out in the cold? A review of Early Middle Palaeolithic settlements in northern Central Europe, age data and geological preconditions for site formation and preservation

Boreas, EarlyView.
The characteristics of settlement of Neanderthals in northern Central Europe during the earlier phases of the Middle Palaeolithic (Marine Isotope Stage 8–6) have been a matter of debate for decades, specifically regarding the population dynamics at such latitudes during the coldest phases. In this paper, we review the known archaeological record of the
Gianpiero Di Maida, Jutta Winsemann, Malte Hoffmann, Tobias Lauer, Utz Böhner, Thomas Terberger   +5 more
wiley   +1 more source

Core scans and lithologic analysis of Subglacial Lake Whillans sediment cores

, 2016
The hydrologic system beneath the Antarctic Ice Sheet is thought to influence both the dynamics and distribution of fast flowing ice streams, which discharge most of the ice lost by the ice sheet.
WISSARD Science Team, Powell, Ross, Tulaczyk, Slawek, Scherer, Reed P, WISSARD Science Team (6980345), Stefanie Brachfield (6980342), Brachfield, Stefanie, Hodson, Timothy O, Timothy O Hodson (6980339), Slawek Tulaczyk (8014925), Reed P Scherer (6963269), Ross Powell (6958595)   +11 more
core   +1 more source

Refining the timing of Middle Pleistocene (MIS 12 to MIS 6) ice advances into northern central Europe: sedimentological analysis and single‐grain luminescence dating of glaciotectonic complexes and tunnel‐valley fills

Boreas, EarlyView.
We summarize the current state of knowledge on the age of the Middle Pleistocene ice advances into northern central Europe and provide 25 new single‐grain feldspar luminescence ages of Elsterian and Saalian glacigenic sediments to constrain the age of the ice advances and their tentative correlation with marine isotope stages/substages.
Niklas von Soest, Neda Rahimzadeh, Debra Colarossi, Falko Malis, Tobias Lauer, Wera Sander‐Beuermann, Yvonne Spychala, Christian Brandes, Runa Fälber, Sumiko Tsukamoto, Jutta Winsemann   +10 more
wiley   +1 more source

Boundary conditions of an active West Antarctic subglacial lake: implications for storage of water beneath the ice sheet [PDF]

The Cryosphere, 2014
Repeat-pass ICESat altimetry has revealed 124 discrete surface height changes across the Antarctic Ice Sheet, interpreted to be caused by subglacial lake discharges (surface lowering) and inputs (surface uplift).
M. J. Siegert, N. Ross, H. Corr, B. Smith, T. Jordan, R. G. Bingham, F. Ferraccioli, D. M. Rippin, A. Le Brocq   +8 more
doaj   +1 more source

Deep Clustering in Radar Subglacial Reflector Reveals New Subglacial Lakes

, 2023
Abstract. 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 images.
Sheng Dong, Lei Fu, Xueyuan Tang, Zefeng Li, Xiaofei Chen   +4 more
openaire   +2 more sources

Towards an ‘absolute’ timing of biostratigraphic and environmental phases from the Saalian late glacial to the Weichselian pleniglacial in central Europe—Insights from a lacustrine succession in Lichtenberg, northern Germany

Boreas, EarlyView.
Palynological records are central to the biostratigraphic subdivision of the Late Pleistocene in central Europe. Yet many interglacial and interstadial phases—such as the Eemian, Brörup and Odderade—remain only poorly constrained in time due to limited numerical dating.
Michael Hein, Thomas Kasper, Alexis Badai Samudra, Martin Theuerkauf, Markus Lothar Fischer, Neda Rahimzadeh, Maria Sekar Proborukmi, Sonja Rigterink, Agnieszka Gruszczyńska, Christian Zeeden, Simon Parfitt, David John Horne, Lucy Roberts, Dustin White, Lisa Brogmus, Hans von Suchodoletz, Tobias Lauer, Marcel Weiss, David Colin Tanner, Brigitte Urban   +19 more
wiley   +1 more source

The last glacial cycle in western Norway—extensive MIS 5d glaciation, multiple glacial advances and LGM glacial advance phases

Boreas, EarlyView.
Raised marine MIS 5c sediments evidence extensive preceding (5d) glaciation in western Norway. This is the first out of five (or six) major Weichselian glacier advances that seem to correspond to North Atlantic sea surface cooling periods. Till beds capping the marine sediments show stages of pre‐LGM advance and subsequent retreat.
Eiliv Larsen, Hans Petter Sejrup, Brent Ward, William E. N. Austin, Hilary H. Birks, Oddvar Longva, Astrid Lyså, Dag Ottesen, Bente Philippsen, Martin Seiler   +9 more
wiley   +1 more source

Subglacial drainage processes at a High Arctic polythermal valley glacier [PDF]

, 2005
Dye-tracer experiments undertaken over two summer melt seasons at polythermal John Evans Glacier, Ellesmere Island, Canada, were designed to investigate the character of the subglacial drainage system and its evolution over a melt season. In both summers,
Nienow, Peter W., Boon, Sarah, Sharp, Martin J., Boon, S., Bingham, Robert George, Bingham, Robert G.   +5 more
core   +1 more source

Previously undocumented subglacial lake beneath Flade Isblink stores most of catchment runoff and delays its release

Scientific Reports
We report the discovery of a previously undocumented subglacial lake beneath the Flade Isblink Ice Cap in North East Greenland. Using satellite Earth Observation data (ICESat-2 elevation data and Sentinel-1 Double Difference InSAR) in the period October ...
Mikkel Aaby Kruse, Nanna Bjørnholt Karlsson, Penelope How, Anders Kusk, Karina Nielsen, Magdalena Łucka, Louise Sandberg Sørensen   +6 more
doaj   +1 more source