Results 51 to 60 of about 1,622 (202)

Geochronological reconstruction of the Lateglacial deglaciation in the Arve Valley (Northern French Alps)

Journal of Quaternary Science, EarlyView.
ABSTRACT The timing and spatial patterns of glaciers retreat in the Northern French Alps during the Lateglacial (19.0–11.7 ka) remain debated, reflecting discrepancies among available chronological data sets. The complex interactions between major glaciers, such as the Rhône and Arve glaciers to the north and the Isère glacier to the south, represent a
Quentin Portal, Christian Crouzet, Jean‐François Buoncristiani, Julien Carcaillet   +3 more
wiley   +1 more source

Subglacial lakes and their changing role in a warming climate [PDF]

, 2021
Subglacial lakes are repositories of ancient climate conditions, provide habitats for life and modulate ice flow, basal hydrology, biogeochemical fluxes and geomorphic activity. In this Review, we construct the first global inventory of subglacial lakes (
Chu, W., McMillan, M., McMillan, Malcolm, Sole, Andrew J., Björnsson, Helgi, Dow, Christine F., Li, Y., Rutishauser, A., Ross, N., Sanderson, R.J., Ng, Felix S. L., Livingstone, Stephen J., Winter, K., Sanderson, Rebecca J., Mikucki, Jill A, Winter, Kate, Sanderson, Rebecca J, Li, Yan, Dow, C., Bowling, Jade S., Fricker, Helen A., Livingstone, Stephen J, Siegert, M.J., Sole, A.J., Siegfried, Matthew, Mikucki, Jill A., Siegert, Martin J., Rutishauser, Anja, Bowling, Jade S, Siegfried, M., Sole, Andrew J, Livingstone, S.J., Ross, Neil, Ng, Felix SL, Mikucki, J.A., Siegert, Martin J, Ng, F., Fricker, H.A., Chu, Winnie, Björnsson, H., Bowling, J.S., Dow, Christine F, Fricker, Helen A   +42 more
core   +1 more source

A balanced water layer concept for subglacial hydrology in large-scale ice sheet models [PDF]

The Cryosphere, 2013
There is currently no doubt about the existence of a widespread hydrological network under the Antarctic Ice Sheet, which lubricates the ice base and thus leads to increased ice velocities.
S. Goeller, M. Thoma, K. Grosfeld, H. Miller   +3 more
doaj   +1 more source

Quantifying the Surface Deformation of Pingos on the Alaskan North Slope Using Interferometric Synthetic Aperture Radar (InSAR)

Permafrost and Periglacial Processes, EarlyView.
ABSTRACT Pingos are large mounds with cores formed of intrusive ice that form in periglacial landscapes. These ice structures can form in regions of discontinuous permafrost, commonly as hydraulic or open‐system pingos, or in locations of continuous permafrost, commonly as hydrostatic or closed‐system pingos.
Venezia M. Follingstad, Roger J. Michaelides, Matthew R. Siegfried, Tyler M. Meng, John Bradford, Kynan H. G. Hughson, Alexia R. Kubas, Andrew Mullen, Enrica Quartini, Austin Routt, Hanna G. Sizemore, Andrei Swidinsky, Britney E. Schmidt   +12 more
wiley   +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

Modeling oscillations in connected glacial lakes

Journal of Glaciology, 2019
Mountain glaciers and ice sheets often host marginal and subglacial lakes that are hydraulically connected through subglacial drainage systems. These lakes exhibit complex dynamics that have been the subject of models for decades.
Aaron G. Stubblefield, Timothy T. Creyts, Jonathan Kingslake, Marc Spiegelman   +3 more
doaj   +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

Supraglacial forcing of subglacial drainage in the ablation zone of the Greenland ice sheet [PDF]

, 2011
Peer ...
Steven Palmer, Peter Nienow, Mair, Douglas, Mair, D., Wadham, J., S., Palmer, Douglas Mair, Ian Bartholomew, Sole, Andrew, Andrew Sole, Thomas Cowton, T., Cowton, Nienow, Peter, Jemma Wadham, Palmer, Steven, Wadham, JL, Cowton, Thomas, Bartholomew, Ian, Sole, A., Palmer, S., P., Nienow, Wadham, Jemma, Cowton, T., Bartholomew, I., A., Sole, Nienow, P.   +25 more
core   +1 more source

Changing climates and environments within the complex Middle to Late Pleistocene fill of an overdeepened valley at Niederweningen, Switzerland

Boreas, EarlyView.
Glacially overdeepened valleys in the northern Alpine Foreland preserve Middle to Late Pleistocene sedimentary sequences that may serve as valuable archives for reconstructing past environmental changes in response to shifts in climate. This study presents a multidisciplinary analysis of two sediment cores from the overdeepened Wehntal Valley at ...
Johannes M. Miocic, Nigel Thew, Ruth Drescher‐Schneider, Hans Rudolf Graf, Marlu Kühn, Frank Preusser, Werner H. Schoch, Lucia Wick, Heinz Furrer   +8 more
wiley   +1 more source

Cauldron subsidence and subglacial floods [PDF]

, 2007
Ice cauldrons are depressions which form at the surface of ice sheets when an underlying subglacial lake empties, in particular when subglacial volcanic eruptions occur.
A.C. Fowler, Fowler, AC, G.W. Evatt, Evatt, GW, Evatt, G. W., Fowler, A. C.   +5 more
core   +2 more sources