A5059195460- Geology and Paleoclimatology Research
- Marine and coastal ecosystems
- Oceanographic and Atmospheric Processes
- Methane Hydrates and Related Phenomena
- Geochemistry and Elemental Analysis
- Atmospheric and Environmental Gas Dynamics
- Isotope Analysis in Ecology
- Climate variability and models
- Marine Biology and Ecology Research
- Ocean Acidification Effects and Responses
- Heavy metals in environment
- Geological formations and processes
- Groundwater and Isotope Geochemistry
- Hydrocarbon exploration and reservoir analysis
- Marine and environmental studies
- Marine Bivalve and Aquaculture Studies
- Geochemistry and Geologic Mapping
- Coral and Marine Ecosystems Studies
- Paleontology and Stratigraphy of Fossils
- Aquatic Ecosystems and Phytoplankton Dynamics
- Astro and Planetary Science
- Geological and Geophysical Studies Worldwide
- Radioactive contamination and transfer
- Mercury impact and mitigation studies
- Atmospheric chemistry and aerosols
CEA Paris-Saclay
2015-2024
Laboratoire des Sciences du Climat et de l'Environnement
2015-2024
Commissariat à l'Énergie Atomique et aux Énergies Alternatives
2015-2024
Centre National de la Recherche Scientifique
2015-2024
Université Paris-Saclay
2016-2024
Université de Versailles Saint-Quentin-en-Yvelines
2009-2021
Centre de Gestion Scientifique
2011
Institut Pierre-Simon Laplace
2004-2007
Abstract. The Ocean Model Intercomparison Project (OMIP) focuses on the physics and biogeochemistry of ocean component Earth system models participating in sixth phase Coupled (CMIP6). OMIP aims to provide standard protocols diagnostics for models, while offering a forum promote their common assessment improvement. It also offers compare solutions same when forced with reanalysis data (OMIP simulations) vs. integrated within fully coupled Here we detail simulation OMIP's biogeochemical inert...
New radiocarbon and chlorofluorocarbon‐11 data from the World Ocean Circulation Experiment are used to assess a suite of 19 ocean carbon cycle models. We use distributions inventories these tracers as quantitative metrics model skill find that only about quarter is consistent with new data‐based metrics. This should serve warning bell larger community not all well current generation At same time, this highlights danger in simply using available models represent state‐of‐the‐art modeling...
A suite of standard ocean hydrographic and circulation metrics are applied to the equilibrium physical solutions from 13 global carbon models participating in phase 2 Ocean Carbon‐cycle Model Intercomparison Project (OCMIP‐2). Model‐data comparisons presented for sea surface temperature salinity, seasonal mixed layer depth, meridional heat freshwater transport, 3‐D fields, overturning. Considerable variation exists among OCMIP‐2 simulations, with some falling noticeably outside available...
Results are presented of export production, dissolved organic matter (DOM) and oxygen simulated by 12 global ocean models participating in the second phase Ocean Carbon‐cycle Model Intercomparison Project. A common, simple biogeochemical model is utilized different coarse‐resolution circulation models. The mean (±1 σ ) downward flux across 75 m depth 17 ± 6 Pg C yr −1 . means globally averaged particle export, fraction total form, surface semilabile carbon (DOC), seasonal net outgassing...
The Central American Seaway played a pivotal role in shaping global climate throughout the late Cenozoic. Recent geological surveys have provided new constraints on timing of seaway shoaling, while neodymium isotopic (εNd) data measured fossil teeth, debris, and ferromanganese crusts helped define history water masses region. Here we provide first 3-D simulations εNd responses to shoaling seaway. Our model suggests that narrow shallow is sufficient affect interoceanic circulation,...
Abstract. Dissolved manganese (Mn) is a biologically essential element. Moreover, its oxidised form involved in removing itself and several other trace elements from ocean waters. Here we report the longest thus far (17 500 km length) full-depth section of dissolved Mn west Atlantic Ocean, comprising 1320 data values high accuracy. This GA02 transect that part GEOTRACES programme, which aims to understand element distributions. The goal this study combine these new observations with new,...
Abstract. Constraints on the Mediterranean Sea's storage of anthropogenic CO2 are limited, coming only from data-based approaches that disagree by more than a factor two. Here we simulate this marginal sea's carbon applying perturbation approach in high-resolution regional model. Our model simulates that, between 1800 and 2001, basin-wide Sea has increased 1.0 Pg C, lower limit based model's weak deep-water ventilation, as revealed evaluation with CFC-12. Furthermore, testing (transit time...
Abstract 230 Th normalization is a valuable paleoceanographic tool for reconstructing high‐resolution sediment fluxes during the late Pleistocene (last ~500,000 years). As its application has expanded to ever more diverse marine environments, nuances of systematics, with regard particle type, size, lateral advective/diffusive redistribution, and other processes, have emerged. We synthesized over 1000 sedimentary records from across global ocean at two time slices, Holocene (0–5,000 years...
Abstract. The marine biological carbon pump is dominated by the vertical transfer of particulate organic (POC) from surface ocean to its interior. efficiency this plays an important role in controlling amount atmospheric that sequestered ocean. Furthermore, abundance and composition POC critical for removal numerous trace elements scavenging, a number which, such as iron, are essential growth organisms, including phytoplankton. Observations laboratory experiments have shown composed...
Abstract. We use a state-of-the-art ocean general circulation and biogeochemistry model to examine the impact of changes in governing change carbon-13 atmospheric CO2 at last glacial maximum (LGM). 5 different realisations ocean's overturning produced by fully coupled atmosphere-ocean under LGM forcing suggested deposition iron phytoplankton physiology LGM. Measured carbon-14, as well qualitative reconstruction carbon export are used evaluate results. Overall, we find that while reduction...
Abstract. Daily modeled fields of phosphate deposition to the Mediterranean from natural dust, anthropogenic combustion and wildfires were used assess effect this external nutrient on marine biogeochemistry. The ocean model is a high-resolution (1∕12°) regional coupled dynamical–biogeochemical Sea (NEMO-MED12/PISCES). input phosphorus are for 2005, which only available daily resolved global atmospheric chemical transport LMDz-INCA. Traditionally, dust has been suggested be main source...
Abstract. The Mediterranean Sea is one of the most oligotrophic regions oceans, and nutrients have been shown to limit both phytoplankton bacterial activities, resulting in a potential major role dissolved organic carbon (DOC) export biological pump. Strong DOC accumulation surface waters already well documented, though measurements stocks flux are still sparse associated with uncertainties. This study provides first basin-scale overview analysis fluxes through modeling approach based on...
The extratropical sources of equatorial undercurrent (EUC) water have been identified for an ocean circulation model using Lagrangian trajectory analysis. It has found that the EUC waters emenate from a wide range latitudes in Pacific basin, with its densest constituent watermass being Subantarctic Mode Water (SAMW) 50°S. Further analysis basin‐scale fields revealed significant advective diapycnal mass fluxes associated intergyre exchange. As result these fluxes, transport as function...
The oceanic distributions of 231 Pa and 230 Th are simulated with the global coupled biogeochemical‐ocean general circulation model NEMO‐PISCES. These natural nonconservative tracers, which removed from water column by reversible scavenging processes onto particles, have been used to study modern past ocean circulation. Our includes three different types particles: particulate organic matter (POM), calcium carbonate (CaCO 3 ), biogenic silica (BSi). It also considers two particle classes:...
A model of aluminium has been developed and implemented in an Ocean General Circulation Model (NEMO-PISCES). In the model, enters ocean by means dust deposition. The internal oceanic processes are described advection, mixing reversible scavenging. evaluated against a number selected high-quality datasets covering much world ocean, especially those from West Atlantic Geotraces cruises 2010 2011. Generally, results fair agreement with observations. However, does not describe well vertical...
Abstract. The distribution of dissolved aluminium in the West Atlantic Ocean shows a mirror image with that silicic acid, hinting at intricate interactions between ocean cycling Al and Si. marine biogeochemistry is interest because its potential impact on diatom opal remineralisation, hence Si availability. Furthermore, concentration surface has been used as tracer for dust input, being most important source bio-essential trace element iron to ocean. Previously, was simulated reasonably well...