A5060570104- Geology and Paleoclimatology Research
- Marine and environmental studies
- Climate variability and models
- Oceanographic and Atmospheric Processes
- Isotope Analysis in Ecology
- Methane Hydrates and Related Phenomena
- Marine and coastal ecosystems
- earthquake and tectonic studies
- Paleontology and Stratigraphy of Fossils
- Cryospheric studies and observations
- Geological formations and processes
- Geological Studies and Exploration
- Geological and Geophysical Studies Worldwide
- Tree-ring climate responses
- Maritime and Coastal Archaeology
- Archaeological and Historical Studies
- Hydrocarbon exploration and reservoir analysis
- Marine Biology and Ecology Research
- Marine and fisheries research
- Polar Research and Ecology
- Atmospheric and Environmental Gas Dynamics
- Geological and Geophysical Studies
- Arctic and Antarctic ice dynamics
The University of Tokyo
2020-2024
UiT The Arctic University of Norway
2023-2024
CEA Paris-Saclay
2019-2023
Université Paris-Saclay
2019-2023
Commissariat à l'Énergie Atomique et aux Énergies Alternatives
2019-2023
Centre National de la Recherche Scientifique
2019-2023
Laboratoire des Sciences du Climat et de l'Environnement
2018-2023
Université de Versailles Saint-Quentin-en-Yvelines
2020
Abstract. The Last Glacial Maximum (LGM, ∼ 21 000 years ago) has been a major focus for evaluating how well state-of-the-art climate models simulate changes as large those expected in the future using paleoclimate reconstructions. A new generation of used to generate LGM simulations part Paleoclimate Modelling Intercomparison Project (PMIP) contribution Coupled Model (CMIP). Here, we provide preliminary analysis and evaluation results these experiments (PMIP4, most which are PMIP4-CMIP6)...
Abstract Simulating and reproducing the past Atlantic meridional overturning circulation (AMOC) with comprehensive climate models are essential to understanding changes as well testing ability of in simulating different climates. At Last Glacial Maximum (LGM), reconstructions show a shoaling AMOC compared modern climate. However, almost all state-of-the-art simulate deeper LGM AMOC. Here, it is shown that this paleodata–model discrepancy partly related model biases sea surface temperatures...
Abstract. The Last Glacial Maximum (LGM, ~ 21,000 years ago) has been a major focus for evaluating how well state-of-the-art climate models simulate changes as large those expected in the future using paleoclimate reconstructions. A new generation of have used to generate LGM simulations part Palaeoclimate Modelling Intercomparison Project (PMIP) contribution Coupled Model (CMIP). Here we provide preliminary analysis and evaluation results these experiments (PMIP4-CMIP6) compare them with...
Abstract Sapropels are sediments rich in black, pelagic organic matter which occur mainly the Eastern Mediterranean, documenting anoxic environments and high biological productivity. The quasiperiodicity of deposition sapropels ‐over millions years‐ relates to Earth's precession cycle, directly enhances African monsoon, ultimately increasing freshwater input from Nile. last sapropel event, S1, occurred about 10,000 years ago (Early Holocene), when Mediterranean region was warmer wetter than...
Abstract Between the Last Glacial Maximum and mid-Holocene, Mediterranean Sea experienced major hydrological changes. The deposition of last sapropel, S1, during Early Holocene is a consequence these In order to cause anoxia in Eastern (EMS) bottom water, long preconditioning period few thousand years would need occur throughout deglaciation prior S1. It generally believed that this freshwater was North Atlantic origin, later supplemented by African Humid (AHP). Here, we investigate another...
Abstract. The quaternary climate is characterised by glacial-interglacial cycles, with the most recent transition from last glacial maximum to present interglacial (the deglaciation) occurring between ~ 21 and 9 ka. While deglacial warming at southern high latitudes mostly in phase atmospheric CO2 concentrations, some proxy records have suggested that onset of occurred before increase. In addition, exhibit a cooling event middle deglaciation (15–13 ka) known as Antarctic Cold Reversal (ACR)....
Abstract. Recently, major progress has been made in the simulation of ocean dynamics Mediterranean using atmospheric and oceanic models with high spatial resolution. High resolution is essential to accurately capture synoptic variability required initiate intermediate- deep-water formation, engine thermohaline circulation (MTC). In paleoclimate studies, one problem regional climate changes that boundary conditions are not available from observations or data reconstruction drive...
The quaternary climate is characterised by glacial-interglacial cycles, with the most recent transition from last glacial maximum to present interglacial (the deglaciation) occurring between ~ 21 and 9 ka. While deglacial warming at southern high latitudes mostly in phase atmospheric CO2 concentrations, some proxy records have suggested that onset of occurred before increase. In addition, exhibit a cooling event middle deglaciation (15–13 ka) known as Antarctic Cold Reversal (ACR)....
Les sapropèles se produisent périodiquement en Méditerranée. Ces évènements de dépôt stratifient la colonne d'eau, inhibent convection des masses d'eaux intermédiaires et profondes, conduisant ainsi à une forte anoxie eaux profondes dont signature est détectable dans les sédiments marins. Depuis nombreuses années, corrélation entre changements d'insolation, moussons africaines sapropèle a été documentée. De plus, très données ont collectées pour différents sapropèles, particulier, le dernier...
Abstract. Recently, major progress has been made in the simulation of ocean dynamics Mediterranean using atmospheric and oceanic models with high spatial resolution. High resolution is essential to accurately capture synoptic variability required initiate intermediate deep-water formation, engine MTC (Mediterranean Thermohaline Circulation). In paleoclimate studies, one problem regional climate changes that boundary conditions are not available from observations or data reconstruction drive...
<p>Southern Ocean sea ice and oceanic fronts are known to play an important role on the climate system, carbon cycles, bottom ocean circulation, Antarctic sheet. However, many models of previous Past-climate Model Intercomparison Project (PMIP) underestimated sea-ice extent (SIE) for Last Glacial Maximum (LGM)(Roche et al., 2012; Marzocchi Jensen, 2017), mainly because surface bias (Flato 2013) that may have impact mean temperature (MOT). Indeed, recent studies further suggest...
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<p>During quaternary, periodic organic rich layers in the Mediterranean Sea marine sediments also known as sapropels, are not only driven by African monsoon modulation. Superimposed to main pacing associated with precession cycles (about 21 ka) many sapropels impacted 100 ka periods glacial-interglacial cycles. The last occurrence (S1) at end of glacial period and Early Holocene is an appropriate illustration this behavior. Recent studies based on long deglaciation simulations...