A5019330152- Oceanographic and Atmospheric Processes
- Ocean Waves and Remote Sensing
- Marine and coastal ecosystems
- Geology and Paleoclimatology Research
- Tropical and Extratropical Cyclones Research
- Fluid Dynamics and Turbulent Flows
- Arctic and Antarctic ice dynamics
- Climate variability and models
- Solar and Space Plasma Dynamics
- Geological and Geophysical Studies
- Climate change and permafrost
- Methane Hydrates and Related Phenomena
- Geological formations and processes
- Meteorological Phenomena and Simulations
- Cryospheric studies and observations
- Aquatic Ecosystems and Phytoplankton Dynamics
- Particle Dynamics in Fluid Flows
- Atmospheric and Environmental Gas Dynamics
- Geophysics and Gravity Measurements
- Oil Spill Detection and Mitigation
- Hydrocarbon exploration and reservoir analysis
- Wind and Air Flow Studies
- Freezing and Crystallization Processes
- Marine and fisheries research
- Aeolian processes and effects
Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques
2015-2024
Sorbonne Université
2014-2024
Centre National de la Recherche Scientifique
2006-2024
Institut de Recherche pour le Développement
2009-2024
Écologie Marine Tropicale des Océans Pacifique et Indien
2022
Institut Pierre-Simon Laplace
2010-2021
Physique et Mécanique des Milieux Hétérogènes
2003-2018
Université Paris Cité
2011-2017
Université Paris Sciences et Lettres
2012
École nationale des ponts et chaussées
2010
Abstract Vertical mixing is often regarded as the Achilles' heel of ocean models. In particular, few models include a comprehensive and energy‐constrained parameterization by internal tides. Here, we present an energy‐conserving scheme which accounts for local breaking high‐mode tides distant dissipation low‐mode The relies on four static two‐dimensional maps tide dissipation, constructed using mode‐by‐mode Lagrangian tracking energy beams from sources to sinks. Each map associated with...
Iron is an essential nutrient that regulates productivity in ~30% of the ocean. Compared with deep (>2000 meter) hydrothermal activity at mid-ocean ridges provide iron to ocean's interior, shallow (<500 fluids are likely influence surface's ecosystem. However, their effect unknown. In this work, we show emitted along Tonga volcanic arc (South Pacific) have a substantial impact on concentrations photic layer through vertical diffusion. This enrichment stimulates biological activity, resulting...
Abstract Near‐inertial internal waves (NIW) excited by storms and cyclones play an essential role in driving turbulent mixing the thermocline interior ocean. Storm‐induced may be climatically relevant regions like ridge southwestern Indian Ocean, where a shallow strong high frequency wind activity enhance impact of gravity wave‐induced on sea surface temperature. The Cirene research cruise early 2007 collected ship‐borne mooring vertical profiles this region under effect developing tropical...
Arctic sea ice is experiencing a shorter growth season and an earlier melt onset. The significance of spring microalgal blooms taking place prior to breakup the subject ongoing scientific debate. During Green Edge project, unique time-series data were collected during two field campaigns held in 2015 2016, which documented for first time concomitant temporal evolution algal phytoplankton beneath landfast western Baffin Bay. Sea negatively correlated respectively reached 26 (6) 152 (182) mg...
Abstract. One of the main purposes BOUM experiment was to find evidence possible impact submesoscale dynamics on biogeochemical cycles. To this aim physical as well data were collected along a zonal transect through western and eastern basins Mediterranean Sea. Along 3-day fixed point stations performed within anticyclonic eddies during which microstructure measurements temperature gradient over top 100 m water column. We focus here characterization turbulent mixing. The analysis revealed...
The breaking of near-inertial wave (NIW) trapped in anticyclones after strong wind events is a well-known pathway for kinetic energy dissipation below the mixed layer ocean and one mechanisms by which responds to modified patterns under climate change. In Mediterranean Sea, where turbulence generally low far from topographic boundaries, NIW trapping has been documented only few large (>100 km) energetic mesoscale features. Whether restricted these isolated semi-permanent features or more...
Harmful algal blooms (HABs) have been considered as a worldwide issue its occurrence devastates aquaculture industry through mass mortality of cultured fish in captivity. In addition, HABs also the potential to harm human consuming marine products contaminated with toxins produced by harmful algae. Indonesia, events had recorded twelve areas archipelagos where member dinoflagelata, for example Cochlodinium sp, Alexandrium Dinophysis Gymnodinium sp and Ceratium were reported dominant...
Abstract Motivated by observations of a strong near-inertial wave signal at the base semipermanent anticyclonic Cyprus Eddy during 2010 Biogeochemistry from Oligotrophic to Ultraoligotrophic Mediterranean (BOUM) experiment, numerical study is performed investigate role near-inertial/eddy interactions in energy transfer out mixed layer. A hybrid temporal–spatial decomposition used split all variables into three independent components: slow (eddy) and fast (inertial oscillations + waves),...
Abstract The large‐scale Arctic sea‐ice retreat induces a gradual replacement of thick, multi‐year sea ice by thinner first‐year ice. latter has distinctive physical properties and is in particular substantially saltier. It generally thought that while salt rejection occurs primarily during formation winter, most the remaining brine flushed out percolating surface melt water summer. Here, it argued substantial part this residual desalination can occur well before summer melt, due to...
Abstract Storfjorden, Svalbard, hosts a polynya in winter and is an important source region of Brine‐enriched Shelf Water (BSW) that, if dense enough, feeds the Arctic Ocean deep water reservoir. Changes BSW production may thus have far‐reaching impacts. We analyze mass distribution circulation Storfjorden trough south it, Storfjordrenna, using hydrographic sections occupied July 2016, following characterized by lowest ice coverage recorded Barents Sea. These observations reveal unusual...
An important issue in turbulence theory is to understand what kinds of elementary flow structures are responsible for the part turbulent energy spectrum described by Kolmogorov's celebrated ${k}^{\ensuremath{-}5/3}$ law. A model such structure has been proposed Lundgren [Phys. Fluids 25, 2193--2203 (1982)] form a vortex with spiral subjected an axially straining field. We report experimental results burst laminar-flow environment showing that this spectrum. If there many evidences existence...
The appearance of internal solitary waves (ISWs) in the Maluku Sea is often captured by satellite imagery. However, no study has revealed details on this phenomenon to date. Here, characteristics such ISWs were investigated based their synthetic aperture radar (SAR) imagery 20 February 2015. Two different sources ISW packets observed: one packet propagating from Lifamatola Passage and another Sangihe Passage. vertical structure was constructed using Korteweg-de Vries (KdV) model, which...
Abstract Microstructure and fine‐scale measurements collected in the central Bay of Biscay during MOUTON experiment are analyzed to investigate dynamics internal waves associated mixing. Large‐amplitude tides (ITs) that excite solitary (ISWs) thermocline observed. ITs dominated by modes 3 4, while ISWs projected on mode 1 is trapped thermocline. Therein, generate a persistent narrow shear band, which strongly correlated with enhanced dissipation rate This strong further reinforced presence...
Abstract The dissipation rate of turbulent kinetic energy ε and the associated diapycnal mixing is inferred from a set microstructure observations collected over several cruises year 2012 to 2014. geographical distribution highlights regions enhanced levels turbulence ranging 10 −9 −6 W kg −1 : Sicily Channel, Corsica Ligurian Sea. Elsewhere, was small, often below −10 . Below 1300 m, geothermal heating provides three‐fold more buoyancy than small‐scale turbulence. Geothermal diffusion...
We investigated a 100 × km high-salinity region of the North Atlantic subtropical gyre during Sub-Tropical Surface Salinity Experiment/Salinity Processes in Upper-ocean Regional Study (STRASSE/SPURS) cruise from August 21, 2012, to September 9, 2012.Results showed great variability sea surface salinity (SSS; over 0.3 psu) mesoscale, 7 cm total evaporation, and little diapycnal mixing below 36 m depth, deepest mixed layers encountered.Strong currents southwestern part domain, penetration...
Storfjorden, which hosts a latent heat polynya, is well known region of dense water formation. This Brine‐enriched Shelf Water (BSW) displays substantial year to variability in its properties, partly linked interannual variations ice production. Here we have developed model based on high‐resolution AMSR‐E satellite sea‐ice concentration data, available between 2002 and 2011, atmospheric forcing estimate the production polynya associated salt release. The average modeled for epoch 2002–2011...
Abstract The Patagonian slope hosts a variety of waves. We used state‐of‐the‐art ocean reanalysis to examine waves at the shelf break and in core Malvinas Current (MC) periods larger than 10 days. Statistics over 25 years indicated three types signals: phase signals specific locations south 47°S; fast propagating all along (phase speed from 140 300 cm/s) between 5 110 days; slower MC speeds 30 20‐day, 60‐day, 100‐day periods. large zonal wind stress variations 47°S forced in‐phase...
Abstract Straits and narrows are the place of intensified turbulent mixing. Deep understanding dynamics at these locations is crucial importance as it conditions properties water masses flowing in open ocean. A new extensive field experiment, PROTEVS GIB20, with high frequency measurements has been conducted Strait Gibraltar. It allows us to infer dissipation rates kinetic energy, ϵ , from two consistent methods. The range depicted for different processes which developed vicinity Camarinal...