A5090981333- Oceanographic and Atmospheric Processes
- Climate variability and models
- Marine and coastal ecosystems
- Geology and Paleoclimatology Research
- Methane Hydrates and Related Phenomena
- Atmospheric and Environmental Gas Dynamics
- Meteorological Phenomena and Simulations
- Ocean Waves and Remote Sensing
- Ocean Acidification Effects and Responses
- Marine and environmental studies
- Geophysics and Gravity Measurements
- Tropical and Extratropical Cyclones Research
- Fluid Dynamics and Turbulent Flows
- Archaeology and ancient environmental studies
- Cell Image Analysis Techniques
- Advanced Thermodynamics and Statistical Mechanics
- Cryospheric studies and observations
- Groundwater flow and contamination studies
- Arctic and Antarctic ice dynamics
- Geological and Geophysical Studies Worldwide
- Maritime and Coastal Archaeology
- Geological Studies and Exploration
- Marine Biology and Ecology Research
- Reservoir Engineering and Simulation Methods
- Science and Climate Studies
Université de Toulouse
2019-2024
Centre National de la Recherche Scientifique
2016-2024
Météo-France
2016-2024
Centre National de Recherches Météorologiques
2016-2023
Abstract This paper describes the main characteristics of CNRM‐CM6‐1, fully coupled atmosphere‐ocean general circulation model sixth generation jointly developed by Centre National de Recherches Météorologiques (CNRM) and Cerfacs for phase Coupled Model Intercomparison Project 6 (CMIP6). The provides a description each component including coupling method new online output software. We emphasize where model's components have been updated with respect to former version, CNRM‐CM5.1. In...
Abstract This study introduces CNRM‐ESM2‐1, the Earth system (ES) model of second generation developed by CNRM‐CERFACS for sixth phase Coupled Model Intercomparison Project (CMIP6). CNRM‐ESM2‐1 offers a higher complexity than Atmosphere‐Ocean General Circulation CNRM‐CM6‐1 adding interactive ES components such as carbon cycle, aerosols, and atmospheric chemistry. As both models share same code, physical parameterizations, grid resolution, they offer fully traceable framework to investigate...
Abstract During winter 2012–2013, open‐ocean deep convection which is a major driver for the thermohaline circulation and ventilation of ocean, occurred in Gulf Lions (Northwestern Mediterranean Sea) has been thoroughly documented thanks particular to deployment several gliders, Argo profiling floats, dedicated ship cruises, mooring array during period about year. Thanks these intense observational efforts, we show that reached bottom early February 2013 area maximum 28 ± 3 . We present new...
Observing, modelling and understanding the climate-scale variability of deep water formation (DWF) in North-Western Mediterranean Sea remains today very challenging. In this study, we first characterize interannual phenomenon by a thorough reanalysis observations order to establish reference time series. These quantitative indicators include 31 observed years for yearly maximum mixed layer depth over period 1980–2013 detailed multi-indicator description 2007–2013. Then hindcast simulation is...
Abstract. The summer of 2022 was memorable and record-breaking, ranking as the second hottest in France since 1900, with a seasonal surface air temperature average 22.7 ∘C. In particular, experienced multiple record-breaking heatwaves during meteorological summer. As main heat reservoir Earth system, oceans are at forefront events this magnitude which enhance oceanic disturbances such marine (MHWs). study, we investigate sea (SST) French maritime basins using remotely sensed measurements to...
Abstract For more than five decades, the Mediterranean Sea has been identified as a region of so‐called thermohaline circulation, namely, basin‐scale overturning driven by surface heat and freshwater exchanges. The commonly accepted view is that an interaction zonal meridional conveyor belts sink at intermediate or deep convection sites. However, connection between sinking in circulation remains unclear. Here we use multidecadal eddy‐permitting numerical simulation glider transport...
Eastern Boundary Upwelling Systems (EBUS) are characterized by wind-triggered upwelling of deep waters along the coast. They hotspots biological productivity and diversity therefore have a high economic, ecological social importance. In past, different methods using surface data been used to estimate upwelling. Recently, IPCC has suggested directly assessing vertical velocities as promising method. We use this method study two Atlantic EBUS from CMIP6 models HadGEM3-GC3.1 CNRM6-CM6 family,...
Future sea level change in the Mediterranean Sea is one of major climate hazards for populations living low-elevation coastal zones (≤10 m above mean level). In this study, we analyze projections rise by end 21st century. To address this, use a set multi-decadal simulations from three pairs regional system models (RCSMs) Med-CORDEX initiative together with their driving global (GCMs). For first time, relative simulated high-resolution and fully coupled to provide detailed...
Over the past few decades, rise of sea level has emerged as a critical concern for coastal regions across globe, driving intense scientific efforts to understand underlying processes. However, disentangling and interpreting ocean physics’ contributions (sterodynamic) these changes remains complex challenge. To contribute better understanding future patterns, this study proposes sterodynamic decomposition Boussinesq models with specific focus on mass change contribution. In...
The northwestern Mediterranean Sea is a well-observed ocean deep convection site. Winter 2012–2013 was an intense and intensely documented dense water formation (DWF) event. We evaluate this DWF event in ensemble configuration of the regional model NEMOMED12. then assess for first time impact intrinsic variability on with novel perturbed initial state method. Finally, we identify main physical mechanisms driving mass transformations. NEMOMED12 reproduces accurately chronology between late...
Abstract The Northwestern Mediterranean (NWMed) Sea includes one of the best observed ocean deep convection sites in World. An observing system simulation experiment (OSSE) is developed to provide a methodology for estimating network errors. It applied quantify dense water volumes NWMed during 2012–2013 with their observation error from MOOSE network. Results OSSE show low spatiotemporal sampling errors, which confirms ability measure waters. However, results are highly sensitive...
Annual growth increments formed in bivalve shells are increasingly used as proxies of environmental variability and change marine ecosystems, especially at higher latitudes. Here, we document that well-replicated exactly dated chronologies can also be developed to capture oceanographic processes temperate semi-enclosed seas, such the Mediterranean. A chronology is constructed for Glycymeris pilosa from a shallow embayment northern Adriatic extends 1979 2016. The significantly (p < 0.05)...
Abstract Chaotic intrinsic variability is a fundamental driver of the oceanic variability. Its understanding key to interpret observations, evaluate numerical models, and predict future ocean climate. Here we study deep convection in northwestern Mediterranean Sea using an ensemble eddy‐resolving hindcast simulation over period 1979–2013. We find that mostly forced but also, considerable extent, intrinsic. The can dominate total locally single winter. It also makes up significant fraction...
Abstract Changes in Mediterranean circulation patterns due to global warming may have strong socio‐economic and environmental impacts. We analyze the future evolution of surface under different levels by using 28 multi‐decadal simulations from a set fully coupled high‐resolution regional climate models Med‐CORDEX multi‐model initiative. There is no model agreement for significant basin‐scale modification circulation. However robust local changes are identified. In particular, expected shift...
Abstract Winter 2012–2013 was a particularly intense and well‐observed Dense Water Formation (DWF) event in the Northwestern Mediterranean Sea. In this study, we investigate impact of mesoscale dynamics on DWF. We perform two perturbed initial state simulation ensembles from summer 2012 to 2013, respectively, mesoscale‐permitting mesoscale‐resolving, with AGRIF refinement tool configuration NEMOMED12. The mean DWF occurs mainly through high‐resolution physics not bathymetry. This is shown be...
Abstract This work aims to clarify the relation between Atlantic meridional overturning circulation (AMOC) and thermal wind. We derive a new generic dynamical AMOC decomposition that expresses wind transport as simple vertical integral function of eastern minus western boundary densities. allows us express density anomalies at any depth geostrophic in Sverdrups (1 Sv ≡ 10 6 m 3 s −1 ) per meter predict around maximum induce most transport. then apply this formalism identify drivers...
Abstract The barotropic vorticity (BV) balance is fundamental when interpreting the ocean gyre circulation. Here we propose an intercomparison of equations for depth‐integrated flow applied to models. We review four distinct variants BV balances, each giving access diagnostic circulation, either meridional, across geostrophic contours or its divergence. then formulate those balances in Vorticity Balances NEMO (VoBiN) package aimed at platform and more generally C‐grid show that spatial...
Abstract. A single-column version of the CNRM-CM6-1 global climate model has been developed to ease development and validation boundary layer physics air–sea coupling in a simplified environment. This framework is then used assess ability coupled represent sea surface temperature (SST) diurnal cycle. To this aim, atmospheric–ocean (AOSCM), called CNRM-CM6-1D, implemented case study derived from CINDY2011/DYNAMO campaign over Indian Ocean, where large SST variabilities have well documented....
Eastern Boundary Upwelling Systems (EBUS) are characterised by wind-triggered upwelling of deep waters along the coast. They hotspots biological productivity and therefore have a high economic, ecological social importance. Here we investigate evolution two Atlantic EBUS during historical period in future high-emission scenario CMIP6 models from modelling centres, with spatial resolutions ranging 1&#176; to 1/12&#176; ocean. The decomposition systems into subregions reveals...
The excess anthropogenic ocean heat is causing thermal expansion, which has driven approximately 40% of the industrial-era global mean sea level rise. This relation between uptake H and thermosteric rise h&#952; mediated by so-called expansion efficiency (EEH=h&#952;/H, in m/YJ) characterises a water-mass under unit increase its enthalpy. EEH depends on temperature, salinity pressure. At scale been characterized both historical observations climate simulations, but role regional...
The Mediterranean Sea is a semi-enclosed basin losing heat and freshwater to the atmosphere. As such, volume, heat, salt budgets are strongly constrained by water mass exchanges with global Ocean. Most of these take place through shallow narrow channel: Strait Gibraltar (SoG), making local processes at stake in its vicinity impact on larger scale. Among these, tidal fine-scale dynamics known influence hydrography, but their combined effects remain unclear. In this study, we address question...
Changes in the Mediterranean circulation patterns due to global warming may have strong socio-economic and environmental impacts. Here, we analyze future evolution of surface under different levels (from 1&#176;C 4&#186;C) with respect preindustrial period. To this end, use a set 18 multi-decadal simulations (7 historical 11 scenario projections) from seven coupled regional climate system models Med-CORDEX initiative. For first time, are used assess impacts change on Sea, allowing us...
&lt;p&gt;Over the last decade, an intensification of extreme warm temperature events, termed as marine heatwaves (MHWs), has been reported in Mediterranean Sea, itself a &amp;#8220;Hot Spot&amp;#8221; region for climate change. In summer 2003, major MHW occurred with abnormal surface anomalies 2-3 C&amp;#186; persisting over month. 2015, undocumented but more intense affected almost entire Sea regional temperatures reaching 4-5 C&amp;#186;. Here, we apply detection...