A5106633161- Oceanographic and Atmospheric Processes
- Marine and coastal ecosystems
- Climate variability and models
- Geology and Paleoclimatology Research
- Ocean Waves and Remote Sensing
- Marine Biology and Ecology Research
- Marine and environmental studies
- Meteorological Phenomena and Simulations
- Reservoir Engineering and Simulation Methods
- Underwater Vehicles and Communication Systems
- Marine and fisheries research
- Tropical and Extratropical Cyclones Research
- Underwater Acoustics Research
- Ocean Acidification Effects and Responses
- Oil Spill Detection and Mitigation
- Fish Ecology and Management Studies
- Geological formations and processes
- Geological and Geophysical Studies Worldwide
- Maritime Ports and Logistics
- Water Quality Monitoring Technologies
- Isotope Analysis in Ecology
- Time Series Analysis and Forecasting
- Coral and Marine Ecosystems Studies
- Maritime Navigation and Safety
- Arctic and Antarctic ice dynamics
Université de Lille
2025
Inserm
2025
Centre Hospitalier Universitaire de Lille
2025
Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques
2012-2024
Centre National de la Recherche Scientifique
2009-2023
Sorbonne Université
2010-2023
Institut de Recherche pour le Développement
2005-2023
École Nationale Supérieure de Techniques Avancées
1998-2021
Université Paris-Saclay
2016
Laboratoire d’Océanographie de Villefranche
2014
Abstract The winter of 2012 experienced peculiar atmospheric conditions that triggered a massive formation dense water on the continental shelf and in deep basin Gulf Lions. Multiplatforms observations enabled synoptic view spreading at scale. Five months after its formation, coastal origin created distinct bottom layer up to few hundreds meters thick over central part NW Mediterranean basin, which was overlaid by newly formed produced open‐sea convection. These new highlight role intense...
We present here a unique oceanographic and meteorological data set focus on the deep convection processes. Our results are essentially based in situ (mooring, research vessel, glider, profiling float) collected from multiplatform integrated monitoring system (MOOSE: Mediterranean Ocean Observing System Environment), which monitored continuously northwestern Sea since 2007, particular high-frequency potential temperature, salinity, current measurements mooring LION located within region. From...
Abstract The Mediterranean Sea is a hotspot for climate change, and recent studies have reported its intense warming salinification. In this study, we use an outstanding dataset relying mostly on glider endurance lines but also other platforms to track these trends in the northwestern where deep convection occurs. Thanks high spatial coverage temporal resolution over period 2007–2017, observed (+0.06 $$^\circ$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msup> <mml:mrow />...
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...
Abstract Since 2007, gliders have been regularly deployed in the northwestern Mediterranean Sea, a crucial region regarding thermohaline circulation of Sea. It revealed for first time very warm (+0.4∘C) and saline (+0.1) submesoscale anticyclones at intermediate depth characterized by small radius (∼5 km), high Rossby (∼0.3), Burger (∼0.7) numbers. They are likely order 10 to be formed each year, life year certainly contribute significantly spreading Levantine Intermediate Waters (LIW)...
Autonomous and cabled platforms are revolutionizing our understanding of ocean systems by providing 4D monitoring the water column, thus going beyond reach ship-based surveys increasing depth remotely sensed observations. However, very few commercially available sensors for such capable large particulate matter (100-2000 μm) plankton despite their important roles in biological carbon pump as trophic links from phytoplankton to fish. Here, we provide details a new, scientific camera-based...
Abstract Since 2010, an intense effort in the collection of situ observations has been carried out northwestern Mediterranean Sea thanks to gliders, profiling floats, regular cruises, and mooring lines. This integrated observing system enabled a year‐to‐year monitoring deep waters formation that occurred Gulf Lions area during four consecutive winters (2010–2013). Vortical structures remnant wintertime vertical mixing events were regularly sampled by different platforms. These are...
Abstract The evolution of the stratification north‐western Mediterranean between summer 2012 and end winter 2013 was simulated compared with different sets observations. A cruise profiler observations were used to improve initial conditions simulation. This improvement crucial simulate convection. Variations some parameters involved in air ‐ sea exchanges (wind, coefficient transfer latent heat flux formulation, constant additive flux) showed that characteristics water masses volume dense...
The impact of the atmospheric forcing on winter ocean convection in Mediterranean Sea was studied with a high‐resolution general circulation model. major areas focus are Levantine basin, Aegean‐Cretan Sea, Adriatic and Gulf Lion. Two companion simulations differing by horizontal resolution were compared. first simulation (MED16‐ERA40) forced air‐sea fields from ERA40, which is ECMWF reanalysis. second (MED16‐ECMWF) ECMWF‐analyzed surface that have twice as high those ERA40. analysis standard...
Two profiling floats, equipped with nitrate concentration sensors were deployed in the northwestern Mediterranean from summer 2012 to 2013. Satellite ocean color data extracted evaluate surface chlorophyll at float locations. Time series of mixed layer depths and concentrations analyzed characterize interplay between physical-chemical biological dynamics area. Deep convection (mixed depth > 1000 m) was observed January–February, although high-nitrate could be already December. Chlorophyll...
Abstract The upwelling system off southern Peru has been observed using an autonomous underwater vehicle (a Slocum glider) during October–November 2008. Nine cross-front sections have carried out across intense cell near 14°S. During almost two months, profiles of temperature, salinity, and fluorescence were collected at less than 1-km resolution, between the surface 200-m depth. Estimates alongshore absolute geostrophic velocities inferred from density field glider drift surfacings. In...
Abstract In June 2013, a glider equipped with oxygen and fluorescence sensors has been used to extensively sample an anticyclonic Submesoscale Coherent Vortex (SCV) in the Ligurian Sea (NW Mediterranean Sea). Those measurements are complemented by full‐depth CTD casts (T, S, oxygen) water samples documenting nutrients phytoplankton pigments within SCV outside. The very homogeneous core of oxygenated waters between 300 1200 m formed 4.5 months earlier during winter deep convection event. It...
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...
des établissements d'enseignement et de recherche français ou étrangers, laboratoires publics privés.
A 13‐compartment model of primary production and degradation dissolved organic matter has been coupled with a general circulation in an open coastal environment (Gulf Lions, Mediterranean) so as to quantify exchanges the sea. The biogeochemical had previously calibrated one‐dimensional vertical version on 1‐year data set, this simulation provides boundary conditions for three‐dimensional model. After spin‐up simulation, quasi‐equilibrium is obtained all compartments, results additional...
During the winter from 2009 to 2013, mixed layer reached seafloor at about 2500 m in northwestern Mediterranean Sea. Intense fronts around deep convection area were repeatedly sampled by autonomous gliders. Subduction down 200–300 m, sometimes deeper, below was regularly observed testifying of important frontal vertical movements. Potential Vorticity dynamics diagnosed using glider observations and a high resolution realistic model 1-km resolution. down-front wind events winter, remarkable...
Abstract This study presents an Observing System Simulation Experiment (OSSE) with a network of gliders in realistic mesoscale field eddies and filaments. The main objective is to demonstrate that the analysis skill evaluation, performed different statistics, determines optimal number needed survey “glider observatory” given simple topology glider array, shape “double comb.” Metrics, based on spatial interpolation sampled data multiscale method, are elaborated evaluate reconstruction...
Abstract Numerous gliders have been deployed in the Gulf of Lions (northwestern Mediterranean Sea) and particular during episodes open‐ocean deep convection winter 2012–2013. The data collected represents an unprecedented density situ observations providing a first statistical 3‐D characterization important mixing agents phenomenon, so‐called plumes. A methodology based on glider‐static flight model was applied to infer oceanic vertical velocity signal from glider navigation data. We...
During the MATER experiment, an eddy characterized by marked Levantine Intermediate Water (LIW) in its core at intermediate depth, and called Sardinian Eddy (SE), has been observed Algerian Basin located western Mediterranean Sea. Here, results from a numerical simulation allow to investigate thoroughly such structures. The formation of SEs their life cycle model are detailed compared in‐situ observations. is associated with detachment continental slope Sardinia large‐scale cyclonic gyre...