A5083634366- Oceanographic and Atmospheric Processes
- Climate variability and models
- Marine and coastal ecosystems
- Arctic and Antarctic ice dynamics
- Geophysics and Gravity Measurements
- Meteorological Phenomena and Simulations
- Ocean Waves and Remote Sensing
- Methane Hydrates and Related Phenomena
- Reservoir Engineering and Simulation Methods
- Geology and Paleoclimatology Research
- Atmospheric and Environmental Gas Dynamics
- Marine and fisheries research
- Hydrocarbon exploration and reservoir analysis
- Geological Studies and Exploration
- Cryospheric studies and observations
- Tropical and Extratropical Cyclones Research
- Aquatic and Environmental Studies
- Geological and Geophysical Studies
- Seismic Waves and Analysis
- Ocean Acidification Effects and Responses
- Seismic Imaging and Inversion Techniques
- Marine and environmental studies
- demographic modeling and climate adaptation
- Geological formations and processes
- Geomagnetism and Paleomagnetism Studies
Institut polytechnique de Grenoble
2017-2025
Université Grenoble Alpes
2016-2025
Institut des Géosciences de l'Environnement
2017-2025
Institut de Recherche pour le Développement
2010-2025
Centre National de la Recherche Scientifique
2016-2025
Institut National de Recherche pour l'Agriculture, l'Alimentation et l'Environnement
2023-2025
National Council for Scientific Research
2022-2024
Laboratoire de Glaciologie et Géophysique de l’Environnement
2013-2017
Laboratoire des Écoulements Géophysiques et Industriels
2003-2012
Université Joseph Fourier
2006-2011
Abstract The Atlantic meridional overturning circulation (AMOC) represents the zonally integrated stream function of volume transport in Basin. AMOC plays an important role transporting heat meridionally climate system. Observations suggest a by 1.3 PW at 26°N—a latitude which is close to where northward thought reach its maximum. This shapes North region as we know it today. In recent years there has been significant progress both our ability observe nature and simulate numerical models....
Over 20 global ocean tide models have been developed since 1994, primarily as a consequence of analysis the precise altimetric measurements from TOPEX/POSEIDON and result parallel developments in numerical tidal modeling data assimilation. This paper provides an accuracy assessment 10 such discusses their benefits many fields including geodesy, oceanography, geophysics. A variety tests indicate that all these agree within 2–3 cm deep ocean, they represent significant improvement over...
Abstract The causes and characteristics of interannual–decadal variability the meridional overturning circulation (MOC) in North Atlantic are investigated with a suite basin-scale ocean models [the Family Linked Model Experiments (FLAME)] global ocean–ice (ORCA), varying resolution from medium to eddy resolving (½°–1/12°), using various forcing configurations built on bulk formulations invoking atmospheric reanalysis products. Comparison model hindcasts indicates similar MOC time scales up...
Abstract This paper evaluates in a realistic context the local contributions of direct atmospheric forcing and intrinsic oceanic processes on interannual sea level anomalies (SLAs). A ¼° global ocean–sea ice general circulation model, driven over 47 yr by full range time scales, is quantitatively assessed against altimetry shown to reproduce most observed features SLA variability from 1993 2004. Comparing this simulation with second only climatological annual cycle reveals that part total...
Abstract. Four global ocean/sea-ice simulations driven by the same realistic 47-year daily atmospheric forcing were performed DRAKKAR group at 2°, 1°, &frac12°, and ¼° resolutions. Simulated mean sea-surface heights (MSSH) sea-level anomalies (SLA) are collocated over period 1993–2004 onto AVISO dataset. MSSH fields compared with an inverse estimate. SLA datasets filtered various time space scales regarding three characteristics: standard deviations, spatial correlations between...
Abstract In high-resolution ocean general circulation models (OGCMs), as in process-oriented models, a substantial amount of interannual to decadal variability is generated spontaneously by oceanic nonlinearities: that is, without any the atmospheric forcing at these time scales. The authors investigate temporal and spatial scales which this intrinsic has strongest imprints on sea level anomalies (SLAs) using ° global OGCM, comparing “hindcast” driven full range with its counterpart forced...
Sea ice drift and deformation from models are evaluated on the basis of statistical scaling properties. These properties derived two observation data sets: RADARSAT Geophysical Processor System (RGPS) buoy trajectories International Arctic Buoy Program (IABP). Two simulations obtained with Louvain‐la‐Neuve Ice Model (LIM) coupled to a high‐resolution ocean model simulation Los Alamos (CICE) were analyzed. compares well observations in terms large‐scale velocity field distributions...
[1] The variability of sea surface temperature (SST) in the equatorial Atlantic is characterized by strong cooling May–June and a secondary November–December. A numerical simulation tropical used to diagnose different contributions tendencies upper ocean. Right at equator, coolest temperatures are observed between 20°W 10°W due enhanced turbulent heat flux center basin. This results from vertical shear bound Equatorial Undercurrent (EUC). Cooling through mixing exhibits semiannual cycle with...
Abstract This study investigates the origin and features of interannual–decadal Atlantic meridional overturning circulation (AMOC) variability from several ocean simulations, including a large (50 member) ensemble global, eddy-permitting (1/4°) ocean–sea ice hindcasts. After an initial stochastic perturbation, each member is driven by same realistic atmospheric forcing over 1960–2015. The magnitude, spatiotemporal scales, patterns both atmospherically forced intrinsic–chaotic interannual...
Abstract Velocity data from a mooring array deployed northeast of the Campeche Bank (CB) show presence subinertial, high-frequency (below 15 days) velocity fluctuations within core northward flowing Loop Current. These are associated with surface-intensified Current frontal eddies (LCFEs), cyclonic vorticity and diameter < 100 km. well reproduced by high-resolution numerical simulation Gulf Mexico, model analysis suggests that they originate along north CB, their main energy source being...
Abstract Ocean circulation is dominated by turbulent geostrophic eddy fields with typical scales ranging from 10 to 300 km. At mesoscales (>50 km), the size of structures varies regionally following Rossby radius deformation. The variability scale smaller eddies not well known due limitations in existing numerical simulations and satellite capability. Nevertheless, it established that oceanic flows (<50 km) generally exhibit strong seasonality. In this study, we present a basin‐scale...
Abstract Fine‐scale motions (<100 km) contribute significantly to the exchanges and dissipation of kinetic energy in upper ocean. However, knowledge ocean at fine‐scales (in terms density transfers) is currently limited due lack sufficient observational data sets these scales. The sea‐surface height measurements upcoming Surface Water Ocean Topography (SWOT) altimeter mission should provide information on down 10–15 km. Numerical models, able describe dynamics ∼10 km, have been developed...
As part of the French CLIPPER project, an eddy permitting model Atlantic circulation has been run for 22 years. The domain open boundaries at Drake passage and 30°E, from Africa to Antarctica. simulated mean circulation, as well activity, is satisfactory a 1/3° resolution, meridional heat transport 30°S within range estimated observations. We use “mixed” boundary algorithm Barnier et al . [1998], which both radiation condition relaxation climatology. climatological forcing strongly...
The current positive trend in the Southern Annular Mode (SAM) is thought to reduce growth rate of Ocean CO 2 sink because enhanced wind‐driven upwelling dissolved inorganic carbon (DIC) increases outgassing natural . However, no study date has quantified potentially large role mesoscale eddies compensating intensified nor mixed‐layer processes terms their effects on fluxes. Here we report results from two new simulations a regional 0.5° eddying model Ocean. first simulation forced with...
Abstract A global eddy‐permitting (1/4° resolution) ocean general circulation model is shown to spontaneously generate intrinsic oceanic variability (IOV) up multidecadal timescales ( T > 20 years) under a repeated seasonal atmospheric forcing. In eddy‐active regions, the signature of this eddy‐driven IOV on sea level substantial, weakly autocorrelated, and comparable (and may clearly exceed) corresponding internal climate (ICV) produced by current coupled models—whose laminar components...
Abstract The low-frequency variability of the Atlantic meridional overturning circulation (AMOC) is investigated from 2, ¼°, and ° global ocean–sea ice simulations, with a specific focus on its internally generated (i.e., “intrinsic”) component. A 327-yr climatological ¼° simulation, driven by repeated seasonal cycle forcing devoid interannual time scales), shown to spontaneously generate significant fraction R interannual-to-decadal AMOC variance obtained in 50-yr “fully forced” hindcast...
Abstract A seasonally forced 1/12° global ocean/sea ice simulation is used to characterize the spatiotemporal inverse cascade of kinetic energy (KE). Nonlinear scale interactions associated with relative vorticity advection are evaluated using cross-spectral analysis in frequency–wavenumber domain from sea level anomaly (SLA) time series. This applied within four eddy-active midlatitude regions having large intrinsic variability spread over a wide range scales. Over these regions, mesoscale...
Abstract A global 1/4° ocean/sea ice 50‐member ensemble simulation is used to disentangle the low‐frequency imprints of atmospherically forced oceanic variability and chaotic intrinsic (IOV) on large‐scale (10° × 10°) ocean heat content (OHC) between 1980 2010. The IOV explains most interannual‐to‐decadal OHC variance over substantial fractions area that increase with depth: 9%, 22%, 31% in 0–700 m, 700–2000 m 2000 bottom layers, respectively. Such areas concern principally eddy‐active...
Abstract. This paper presents the technical implementation of a new, probabilistic version NEMO ocean–sea-ice modelling system. Ensemble simulations with N members running simultaneously within single executable, and interacting mutually if needed, are made possible through an enhanced message-passing interface (MPI) strategy including double parallelization in spatial ensemble dimensions. An example application is then given to illustrate implementation, performances, potential use this...