Results 51 to 60 of about 45,272 (221)

Net effect of ice-sheet–atmosphere interactions reduces simulated transient Miocene Antarctic ice-sheet variability [PDF]

The Cryosphere, 2022
Benthic δ18O levels vary strongly during the warmer-than-modern early and mid-Miocene (23 to 14 Myr ago), suggesting a dynamic Antarctic ice sheet (AIS).
L. B. Stap, C. J. Berends, M. D. W. Scherrenberg, R. S. W. van de Wal, R. S. W. van de Wal, E. G. W. Gasson   +5 more
doaj   +1 more source

Relative sea-level rise around East Antarctica during Oligocene glaciation [PDF]

, 2013
During the middle and late Eocene (∼48-34 Myr ago), the Earth's climate cooled and an ice sheet built up on Antarctica. The stepwise expansion of ice on Antarcticainduced crustal deformation and gravitational perturbations around the continent.
Adam Klaus, AJP Houben, Alexander J. P. Houben, Annick Fehr, Bert L. A. Vermeersen, BS Wade, C Escutia, Carlota Escutia, Carlota Escutia, Catherine E. Stickley, CE Stickley, CH Lear, Christina Riesselman, D Pollard, David Pollard, DI Close, DS Wilson, Escutia, Fielding, Francisco J. Jimenez-Espejo, Gee Soo Kong, GS Boulton, HD Scher, Henk Brinkhuis, Henk Brinkhuis, HK Coxall, James A. P. Bendle, JB Barron, JC Zachos, JC Zachos, Jhon J. Gonzàlez, Jose Abel Flores, Jörg Pross, Kevin Welsh, KG Miller, Kota Katsuki, Lisa Tauxe, MA Kominz, Masako Yamane, Masao Iwai, Matthew P. Olney, ME Raymo, MJ Hambrey, Mutsumi Nakai, N Gomez, N Gomez, Paolo Stocchi, PE O’Brien, Peter K. Bijl, Peter K. Bijl, Prakash Kumar Shrivastava, R DeConto, R Kendall, Robert B. Dunbar, Robert M. DeConto, Robert M. McKay, RS Woodward, S Galeotti, Saiko Sugisaki, Sandra Passchier, Sandra Passchier, Shouting Tuo, Simone Galeotti, SM Bohaty, Stephanie A. Carr, Stephen F. Pekar, Steven M. Bohaty, T Erohina, Tina van de Flierdt, Toyosaburo Sakai, Travis G. Hayden, Trevor Williams, Ursula Röhl, Z Liu   +73 more
core   +2 more sources

Modeling the oxygen isotope composition of the Antarctic ice sheet and its significance to Pliocene sea leve [PDF]

, 2016
Recent estimates of global mean sea level based on the oxygen isotope composition of mid-Pliocene benthic foraminifera vary from 9 to 21 m above present, which has differing implications for the past stability of the Antarctic ice sheet during an ...
David Pollard, DeConto, Edward Gasson, Langebroek, Raymo, Robert M. DeConto   +5 more
core   +1 more source

Changes in the Antarctic’s Summer Surface Albedo, Observed by Satellite since 1982 and Associated with Sea Ice Anomalies

Remote Sensing, 2023
In polar regions, positive feedback of snow and ice albedo can intensify global warming. While recent significant decreases in Arctic surface ice albedo have drawn considerable attention, Antarctic surface albedo variability remains underexplored.
Yuqi Sun, Yetang Wang, Zhaosheng Zhai, Min Zhou   +3 more
doaj   +1 more source

Uncertainty quantification of the multi-centennial response of the Antarctic ice sheet to climate change [PDF]

The Cryosphere, 2019
Ice loss from the Antarctic ice sheet (AIS) is expected to become the major contributor to sea level in the next centuries. Projections of the AIS response to climate change based on numerical ice-sheet models remain challenging due to the complexity of ...
K. Bulthuis, K. Bulthuis, M. Arnst, S. Sun, F. Pattyn   +4 more
doaj   +1 more source

Multidecadal warming of Antarctic waters [PDF]

, 2014
Decadal trends in the properties of seawater adjacent to Antarctica are poorly known, and the mechanisms responsible for such changes are uncertain. Antarctic ice sheet mass loss is largely driven by ice shelf basal melt, which is influenced by ocean-ice
Aoki, Shigeru, Heywood, Karen J., Schmidtko, Sunke, Thompson, Andrew F.   +3 more
core   +1 more source

The effect of the present-day imbalance on schematic and climate forced simulations of the West Antarctic Ice Sheet collapse [PDF]

The Cryosphere
Recent observations reveal that the West Antarctic Ice Sheet is rapidly thinning, particularly at its two largest outlet glaciers, Pine Island Glacier and Thwaites Glacier, while East Antarctica remains relatively stable. Ice sheet model projections over
T. van den Akker, T. van den Akker, T. van den Akker, W. H. Lipscomb, G. R. Leguy, W. J. van de Berg, R. S. W. van de Wal, R. S. W. van de Wal, R. S. W. van de Wal   +8 more
doaj   +1 more source

Antarctic climate and ice-sheet configuration during the early Pliocene interglacial at 4.23Ma [PDF]

, 2017
The geometry of Antarctic ice sheets during warm periods of the geological past is difficult to determine from geological evidence, but is important to know because such reconstructions enable a more complete understanding of how the ice-sheet system ...
C. J. Fogwill, D. E. Kowalewski, E. G. W. Gasson, N. R. Golledge, N. R. Golledge, R. H. Levy, R. M. McKay, T. R. Naish, Z. A. Thomas   +8 more
core   +3 more sources

Body Size Regulates Niche Overlap Asymmetry in the Subtropical Andes Rain Shadow: Isotopic Paleoecology of Oligocene South American Ungulates

Integrative Zoology, EarlyView.
This study provides the first isotopic analysis of Oligocene mammals from Quebrada Fiera, Mendoza, Argentina, filling a major gap in South American paleontology. It reveals a latitudinal gradient in aridity due to the Andean rain shadow and highlights the role of (semi)permanent water bodies in sustaining diverse herbivore communities. Additionally, it
Dánae Sanz‐Pérez, Santiago Hernández Del Pino, Esperanza Cerdeño, Manuel Hernández Fernández, Laura Domingo   +4 more
wiley   +1 more source

What can lithics tell us about hominin technology's ‘primordial soup’? An origin of stone knapping via the emulation of Mother Nature

Archaeometry, EarlyView.
Abstract The use of stone hammers to produce sharp stone flakes—knapping—is thought to represent a significant stage in hominin technological evolution because it facilitated the exploitation of novel resources, including meat obtained from medium‐to‐large‐sized vertebrates. The invention of knapping may have occurred via an additive (i.e., cumulative)
Metin I. Eren, Stephen J. Lycett, Michelle R. Bebber, Alastair Key, Briggs Buchanan, Emma Finestone, Joseph Benson, Rebecca Biermann Gürbüz, Adela Cebeiro, Roman Garba, Anne Grunow, C. Owen Lovejoy, Danielle MacDonald, Erica Maletic, G. Logan Miller, Joseph D. Ortiz, Jonathan Paige, Justin Pargeter, Tomos Proffitt, Mary Ann Raghanti, Teal Riley, Jeffrey I. Rose, David M. Singer, Robert S. Walker   +23 more
wiley   +1 more source