Results 41 to 50 of about 3,714 (183)

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

Keeping an Eye on Antarctic Ice Sheet Stability [PDF]

Oceanography, 2019
Knowledge of how the Antarctic Ice Sheet (AIS) responded in the geologic past to warming climates will provide powerful insight into its poorly understood role in future global sea level change. Study of past natural climate changes allows us to determine the sensitivity of the AIS to higher-than-present atmospheric carbon dioxide (CO) concentrations ...
Escutia, Carlota, DeConto, Robert M., Dunbar, Robert, De Santis, Laura, Shevenell, Amelia E, Naish, Timothy   +5 more
openaire   +3 more sources

Future Antarctic bed topography and its implications for ice sheet dynamics [PDF]

Solid Earth, 2014
The Antarctic bedrock is evolving as the solid Earth responds to the past and ongoing evolution of the ice sheet. A recently improved ice loading history suggests that the Antarctic Ice Sheet (AIS) has generally been losing its mass since the Last ...
S. Adhikari, E. R. Ivins, E. Larour, H. Seroussi, M. Morlighem, S. Nowicki   +5 more
doaj   +1 more source

Comparison and analysis of CryoSat DEM and the several Antarctic DEM

地质科技通报, 2021
Antarctica is covered by huge snow and ice, and its geological structure is bounded by the Trans-Antarctic Mountains, and is generally divided into the East Antarctic Shield and the West Antarctic Active Zone.
Wenli Yue, Yusen Dong, Abudula-Abudukadier, Jingyue Cui, Bangzheng Zhang   +4 more
doaj   +1 more source

Responses of Antarctic seabird populations to past climate change

Ecography, EarlyView.
Higher‐order predators such as Antarctic seabirds serve as ecological indicators of environmental change and provide a crucial trophic link between marine and terrestrial ecosystems. Despite their prevalence and significance in the Antarctic ecosystem, there is a lack of understanding of the impacts of major regime shifts in paleoclimate on flighted ...
Elize Y. X. Ng, Louise Emmerson, Barbara Wienecke, Fabiola León Miranda, Colin Southwell, Juliana A. Vianna, Christopher P. Burridge   +6 more
wiley   +1 more source

Bryozoan‐Rich Carbonate Units of the Erfoud Area (SE Morocco) Record Latest Katian to Early Hirnantian Interglacial Intervals

Geological Journal, EarlyView.
In this study, we re‐examine the depositional architecture of the Erfoud limestone in Morocco. Introducing new biostratigraphic constraints from chitinozoan assemblages, we show that Katian to Hirnantian bryozoan‐pelmatozoan meadows reflect flooding events linked to a series of interglacial transgressions known to have occurred immediately prior to the
Philippe Razin, Jean‐François Ghienne, Amira Meddour, Lorena Tessitore, Thijs R. A. Vandenbroucke   +4 more
wiley   +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

Ostracod faunal and geochemical evidence for the impact of Hoxnian (MIS 11c) sea levels in eastern England

Journal of Quaternary Science, EarlyView.
ABSTRACT Marine isotope substage 11c (~426–366 ka) is widely regarded as the most recent Pleistocene interglacial that is broadly analogous to the Holocene. The timing and magnitude of sea‐level changes during MIS 11 have been much debated, particularly concerning whether sea levels were significantly higher than during the Holocene. Empirical evidence
Tom S. White, Jonathan A. Holmes, David J. Horne, David R. Bridgland   +3 more
wiley   +1 more source

A model of the Antarctic Ice Sheet

Deep Sea Research Part B. Oceanographic Literature Review, 1982
Numerical modelling of ice sheets and glaciers has become a useful tool in glaciological research. A model described here deals with the vertical mean ice velocity, is time dependent, computes bedrock adjustment and uses an empirical diagnostic relationship to derive the distribution of ice thickness in ice shelves.
openaire   +3 more sources

Short-term Antarctic ice-sheet dynamics during the late Oligocene

Communications Earth & Environment
Palaeoceanographic records spanning the Oligocene provide insights into Antarctic ice-sheet dynamics in a world warmer-than-today, allowing us to improve future climate projections linked to global warming.
Layla Creac’h, Swaantje Brzelinski, Jörg Lippold, Marcus Gutjahr, Martin Frank, Alexa Fischer, Oliver Friedrich   +6 more
doaj   +1 more source