Results 71 to 80 of about 3,714 (183)

A Late Cretaceous‐Eocene Geomagnetic Polarity Time Scale (MM26) That Combines Marine Magnetic Anomaly Records, Radioisotopic Dates, and Astrochronology

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 10, October 2026.
Abstract The Geomagnetic Polarity Time Scale (GPTS) is essential to date geological events in stratigraphic sequences and to reconstruct plate motions. The first GPTSs were based on the record of magnetic anomalies created by seafloor spreading, calibrated by a few radioisotopic dates.
A. Malinverno, S. R. Meyers
wiley   +1 more source

Last Interglacial subsurface warming on the Antarctic shelf triggered by reduced deep-ocean convection

Communications Earth & Environment
The Antarctic ice-sheet could have contributed 3 to 5 m sea-level equivalent to the Last Interglacial sea-level highstand. Such an Antarctic ice-mass loss compared to pre-industrial requires a subsurface warming on the Antarctic shelf of ~ 3 °C according
Nicholas King-Hei Yeung, Laurie Menviel, Katrin J. Meissner, Dipayan Choudhury, Tilo Ziehn, Matthew A. Chamberlain   +5 more
doaj   +1 more source

Impact of Model Resolution on Antarctic Bottom Water Representation in Coupled Climate Models

Journal of Geophysical Research: Oceans, Volume 131, Issue 10, October 2026.
Abstract Antarctic Bottom Water (AABW) formation plays a crucial role in the climate system by driving the lower branch of the global overturning circulation, redistributing heat and salt, storing anthropogenic carbon dioxide, and delivering oxygen to the deep ocean.
Qi Shu, Qiang Wang, Zhaomin Wang, Yongqiang Yu, Jiping Liu, Caili Liu, Bo An, Zhenya Song, Fangli Qiao   +8 more
wiley   +1 more source

Simulated Ocean Oxygen Under Miocene Boundary Conditions

Paleoceanography and Paleoclimatology, Volume 41, Issue 10, October 2026.
Abstract The Miocene Climatic Optimum (MCO; 16.9–14.7 Ma) was a warm interval with atmospheric CO2 ${\text{CO}}_{2}$ comparable to end‐of‐21st‐century projections under intermediate emission scenarios. Proxy records indicate the Oxygen Minimum Zone (OMZ) in the Eastern Tropical Pacific (ETP) was small or non‐existent during the MCO, expanding only when
James R. Berg, David K. Hutchinson, Katrin J. Meissner, Benoît Pasquier, Mark Holzer, Alexandra Auderset   +5 more
wiley   +1 more source

Comparison of calibration methods of a PICO basal ice shelf melt module implemented in the GRISLI v2.0 ice sheet model [PDF]

Geoscientific Model Development
Uncertainties in future sea level rise are mainly due to uncertainties in Antarctic ice sheet projections. Indeed, modelling the future of the Antarctic ice sheet presents many challenges.
M. Menthon, P. Bakker, A. Quiquet, D. M. Roche, D. M. Roche, R. Reese   +5 more
doaj   +1 more source

Tracing Particle Paths in the Antarctic Ice Sheet [PDF]

Journal of Glaciology, 1981
Abstract A layer of moraine within the Antarctic ice sheet has been detected in the course of airborne radar ice soundings. The moraine was injected at the margin of the ice and can serve as a tracer to pick out a particle path within the ice.
openaire   +2 more sources

Cenozoic tropical carbonate platforms in the Santos Basin, SE Brazilian Margin

Sedimentology, Volume 73, Issue 6, Page 2454-2487, October 2026.
ABSTRACT Tropical carbonate platforms accompanied the latitudinal shifts of the tropical belt throughout the Cenozoic. Their flat‐topped geometries were influenced by a specific set of processes, including climate and sea‐level changes, carbonate facies, tectonics and continental runoff.
Mateus Gama, Gabriel Tagliaro, Adolfo Britzke, Pedro Bauli, Otavio Neto, Luigi Jovane   +5 more
wiley   +1 more source

Iceberg Freshwater Transport Alleviates Future Weakening of Antarctic Bottom Water Formation

Geophysical Research Letters, Volume 53, Issue 18, 28 September 2026.
Abstract Intensification of calving in a warmer future climate would result in production of more Antarctic icebergs, and iceberg freshwater flux would play a more consequential role in ice‐climate interactions. Distribution of iceberg freshwater flux under future climate scenarios, however, has not been assessed with full consideration of changes and ...
Jiawei Shi, Dawei Li
wiley   +1 more source

Coupling framework (1.0) for the Úa (2023b) ice sheet model and the FESOM-1.4 z-coordinate ocean model in an Antarctic domain [PDF]

Geoscientific Model Development
The rate at which the Antarctic ice sheet loses mass is to a large degree controlled by ice–ocean interactions underneath small ice shelves, with the most sensitive regions concentrated in even smaller areas near grounding lines and local pinning points.
O. Richter, O. Richter, O. Richter, R. Timmermann, G. H. Gudmundsson, J. De Rydt   +5 more
doaj   +1 more source

New Constraint on Future Ocean Heat Uptake Revealed by Considering Model Spread of Radiative Forcing

Geophysical Research Letters, Volume 53, Issue 18, 28 September 2026.
Abstract Radiative forcing (F) $(F)$ is the fundamental driver of ocean heat uptake (N) $(N)$; however, its contribution to intermodel spread in N $N$ has not been quantified. We address this gap by leveraging a new set of CMIP6 experiments that diagnoses time‐varying F $F$ for the first time in 11 models.
Quran Wu, Jonathan Gregory
wiley   +1 more source