A5073035242- Ocean Waves and Remote Sensing
- Oceanographic and Atmospheric Processes
- Coastal and Marine Dynamics
- Tropical and Extratropical Cyclones Research
- Geophysics and Gravity Measurements
- Arctic and Antarctic ice dynamics
- Geological and Geophysical Studies
- Climate variability and models
- Earthquake Detection and Analysis
- Ionosphere and magnetosphere dynamics
- Meteorological Phenomena and Simulations
- Underwater Acoustics Research
- Seismic Imaging and Inversion Techniques
- Marine and coastal ecosystems
- Seismic Waves and Analysis
- Ultrasonics and Acoustic Wave Propagation
- Reservoir Engineering and Simulation Methods
- Methane Hydrates and Related Phenomena
- Calibration and Measurement Techniques
- Arctic and Russian Policy Studies
- Regional Economic and Spatial Analysis
- Spectroscopy Techniques in Biomedical and Chemical Research
- Solar and Space Plasma Dynamics
- Marine Biology and Ecology Research
- Engineering Applied Research
Météo-France
2015-2024
DGA Techniques aérospatiales
2022
Centre d'Étude et de Recherche Travail Organisation Pouvoir
2021
Centre National de la Recherche Scientifique
2010
Centre National de Recherches Météorologiques
2009
Institut de Recherche sur les Phénomènes Hors Équilibre
2002
Kyoto University
2000
New parameterizations for the spectra dissipation of wind-generated waves are proposed. The rates have no predetermined spectral shapes and functions wave spectrum wind speed direction, in a way consistent with observation breaking swell properties. Namely, is nonlinear proportional to steepness, due non-zero only when non-dimensional exceeds threshold at which observed start breaking. An additional source short long introduced represent longer waves. Several degrees freedom wind-wave...
The Galician coast (NW Spain) is a region that strongly influenced by the presence of low pressure systems in mid-Atlantic Ocean and periodic passage storms give rise to severe sea states. Since its wave climate one most energetic Europe, objectives this paper were twofold. first objective was characterize extreme height events Galicia over wintertime two-year period (2015–2016) using reliable high-frequency radar parameters concert with predictions from regional (WAV) forecasting system...
This article describes the first results obtained from Surface Waves Investigation and Monitoring (SWIM) instrument carried by China France Oceanography Satellite (CFOSAT), which was launched on October 29, 2018. SWIM is a Ku-band radar with near-nadir scanning beam geometry. It designed to measure spectral properties of surface ocean waves. First, good behavior illustrated. then shown that nadir products (significant wave height, normalized cross section, wind speed) exhibit an accuracy...
Abstract. The Southern Ocean has a profound impact on the Earth's climate system. Its strong winds, intense currents, and fierce waves are critical components of air–sea interface contribute to absorbing, storing, releasing heat, moisture, gases, momentum. Owing its remoteness harsh environment, this region is significantly undersampled, hampering validation prediction models large-scale observations from satellite sensors. Here, an unprecedented data set simultaneous surface ocean...
Copernicus Marine Service Monitoring and Forecasting Centres (MFCs) are improving their models to resolve finer-scale oceanographic features, driven by a growing need for high-resolution, short-term ocean forecasts. A key limitation forecast accuracy, however, stems from errors in the model forcings. These can be mitigated with Artificial Neural Networks (ANNs) that trained increasing volume of remote sensing observations. ANNs allow extract spatio-temporal patterns these measurements,...
Abstract We discuss the crossing sea state and probability of rogue waves during accident tanker Prestige on 13 November 2002. present newly computed hindcast spectra for every hour that day at nearby locations, showing development a bimodal with two wave systems nearly right angle. employ four different nonlinear models capable computing phase‐resolved surface from spectra, allowing us to estimate statistics occurrence waves. At location moment accident, give expected values kurtosis κ =...
Abstract In spite of continuous improvements ocean wave models in the last decades, large errors still remain particular under strongly forced conditions, often encountered Southern Ocean, where strong westerly winds generate some fiercest waves on Earth almost unlimited fetch conditions. The newly launched China‐France Oceanography SATellite (CFOSAT) provides directional spectra for both wind seas and swells. Compared to Synthetic Aperture Radar (SAR), it can resolve shorter wavelengths all...
Abstract. Wind waves and swells are major drivers of coastal environment changes hazards such as flooding erosion. Wave characteristics sensitive to in water depth shallow intermediate waters. However, wave models used for historical simulations projections typically do not account sea level whether from tides, storm surges, or long-term rise. In this study, the sensitivity projected is investigated along Atlantic European coastline. For purpose, a global model dynamically downscaled over...
Abstract. Accurate short-term wave forecasts are crucial for numerous maritime activities. Wind and surface currents, the primary forcings spectral models, directly influence forecast accuracy. While remote sensing technologies like Satellite Synthetic Aperture Radar (SAR) High Frequency (HFR) provide high-resolution spatio-temporal data, their integration into operational ocean forecasting remains challenging. This contribution proposes a methodology improving these by correcting them with...
The Southern Ocean is strongly affected by uncertainties on the surface wind, and consequently fluxes exchanged between atmosphere ocean include fairly strong biases. assimilation of directional wave spectra from scatterometer SWIM CFOSAT has demonstrated improvement prediction different scales waves wind-waves to swell. As a result, estimation momentum heat are positively affected, particularly in western boundary current regions. This work presents long term validation key parameters...
The CFOSAT (China-France Oceanography SATellite) satellite mission, a successful cooperation between China and France, launched in 28 October 2018 has revealed the importance of directional observations waves winds at ocean surface. SWIM wave scatterometer provides detailed description energy direction wavelengths ranged from 50 to 1100 m. This presentation summarize oustanding acchievements mission on science operational applications. assimilation such into model enabled significant...
HY2B is now the latest altimetry mission that provides global nadir significant wave height (SWH) and sea surface wind speed. The validation calibration of are carried out against National Data Buoy Center (NDBC) buoy observations from April 2019 to 2020. In general, altimeter measurements agree well with observation, scatter index 9.4% for SWH, 15.1% However, we observed a bias 0.14 m SWH −0.42 m/s A deep learning technique novelly applied Deep neural network (DNN) built trained correct...
Abstract The “China France Oceanography Satellite” (CFOSAT) launched in 2018 now routinely provides directional ocean wave spectra at the global scale. It consists of analyzing normalized radar cross‐section measured by near‐nadir pointing Ku‐Band real‐aperture scanning SWIM (Surface Waves Investigation and Monitoring). significant height, dominant wavelength direction are provided as main parameters, but here, we analyze additional namely frequency width omni‐directional spectra, spread...
Abstract Within the framework of Surface Waves Investigation and Monitoring from Satellite mission (SWIMSAT) proposed to European Space Agency, an assimilation scheme has been implemented in Wave Model (WAM) order estimate impact spectral information on wave prediction. The uses optimal interpolation “spectral partitioning” principle. synthetic spectra are located along a SWIMSAT orbit track assimilated 4-day-period simulation. Random errors included simulate uncertainties instrumentation....
The Marginal Ice Zone (MIZ) forms a critical transition region between the ocean and sea ice cover as it protects close further in from effect of steepest most energetic open waves. As waves propagate through MIZ, they get exponentially attenuated. Unfortunately, associated attenuation coefficient is difficult to accurately estimate model, there are still large uncertainties around which mechanisms dominate depending on conditions. This makes challenging predict attenuation, well effective...
As a part of our calibration/validation activities five months SARAL/AltiKa wave data have been analyzed in this study. A robust quality control procedure using threshold values on signal and retrieved heights was implemented before the assimilation. Assimilation runs model Météo-France (MFWAM) were performed for long period. The validation outputs with independent observations from altimeter buoy data. results indicate good performance terms bias scatter index significant height peak...
Improving wave forecasting in the polar oceans is crucial for coupled earth system and climate monitoring. There still a strong uncertainties on variability Marginal Ice Zone (MIZ) oceans. The scatterometer SWIM of CFOSAT, provide directional spectra, which are very useful to improve forecast MIZ validation using wave/ice interactions source term MFWAM model. aim this work firstly assess impact ice probability products provided by CFOSAT model, secondly calibrate validate attenuation induced...
The China-France Oceangraphy SATellite (CFOSAT) is an innovative satellite mission with wind and waves measurements on oceans. This paper aims to evaluate the first results of assimilation wave data provided by CFOSAT in model MFWAM. Model runs are implemented during Calibration/Validation phase mission. compared from altimeters buoys. promising indicate a significant improvement heights different ocean basins (high latitudes, intermediate latitudes tropics). Azimuthal cut-off sensitivity...
Abstract The wave numerical simulation accuracy can be improved by assimilating remotely sensed observations. In addition to the nadir, significant height (SWH), Surface Waves Investigation and Monitoring (SWIM) onboard Chinese‐French Oceanic SATellite (CFOSAT) provides two additional columns of spectra observations within wavelengths from 70 500 m. A model based on a deep neural network (DNN) is developed retrieve total SWH partially observed SWIM. DNN uses parameters both SWIM nearest...
The Copernicus Marine IBI-MFC (Iberia–Biscay–Ireland Monitoring and Forecasting Centre) has delivered operational wave forecasts since 2017. application is based on a MFWAM model (Meteo-France WAve Model) set-up, running at 1/20º grid (5-km). research presented here was conducted to improve the accuracy of products, by means (i) including new data assimilation scheme (ii) developing coupled ocean-wave modelling framework. Evaluation these set-up upgrades, in terms improvements IBI system...