A5033398132- Ocean Waves and Remote Sensing
- Coastal and Marine Dynamics
- Tropical and Extratropical Cyclones Research
- Oceanographic and Atmospheric Processes
- Wind Energy Research and Development
- Wave and Wind Energy Systems
- Geological formations and processes
- Fluid Dynamics Simulations and Interactions
- Wind and Air Flow Studies
- Aeolian processes and effects
- Coastal wetland ecosystem dynamics
- Meteorological Phenomena and Simulations
- Underwater Acoustics Research
- Advanced Computational Techniques and Applications
- Complex Systems and Time Series Analysis
- Fluid Dynamics and Vibration Analysis
- Fluid Dynamics and Turbulent Flows
- Target Tracking and Data Fusion in Sensor Networks
- Underwater Vehicles and Communication Systems
- High voltage insulation and dielectric phenomena
- Advanced Fiber Laser Technologies
- Energy Harvesting in Wireless Networks
- Climate variability and models
- Water Quality Monitoring Technologies
- Thermal Analysis in Power Transmission
Laboratoire de Biotechnologie et Chimie Marines
2014-2023
Service Hydrographique et Océanographique de la Marine
2008-2013
University of Hawaiʻi at Mānoa
2012
Ifremer
2010
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...
Monitoring of dune erosion and accretion on the high-energy macrotidal Vougot beach in North Brittany (France) over past decade (2004–2014) has revealed significant morphological changes. Dune toe erosion/accretion records have been compared with extreme water level measurements, defined as sum (i) astronomic tide; (ii) storm surge; (iii) vertical wave runup. Runup parameterization was conducted using swash limits, profiles, hydrodynamic (Hm0, Tm0,–1, high tide level—HTWL) data sets obtained...
Abstract Stereo imaging of the sea surface elevation provides unique field data to investigate geometry and dynamics oceanic waves. Typically, this technique allows retrieving 4-D ocean topography (3-D space + time) at high frequency (up 15–20 Hz) over a region area ~10 4 m 2 . fill existing wide gap between time-measurements, like local observation provided by wave-buoys, large-scale observations satellites. The analysis stereo images direct measurement wavefield without need any...
Abstract Wave runup is known to depend on offshore wave conditions and coastal morphology. While most field studies have focused low‐to‐mild‐sloping sandy beaches, measurements steep irregular rocky cliff profiles are still very scarce. Here we investigate the physical processes controlling in such environments range of applicability empirical formula. This study focuses cliffs (0.1 < tan β 0.4) Banneg Island, a small island located Molène archipelago, Brittany, France, occasionally...
Abstract Wave breaking is an important process for energy dissipation in the open ocean and coastal seas. It drives beach morphodynamics, controls air-sea interactions, determines when ship offshore structure operations can occur safely, influences on retrieval of properties from satellites. Still, wave lacks a proper physical understanding mainly due to scarce observational field data. Consequently, new methods data are required improve our current this process. In paper we present novel...
A system of two coupled four-beam acoustic Doppler current profilers was used to collect turbulence measurements over a 36-h period at highly energetic tidal energy site in Alderney Race. This enables the evaluation six components Reynolds stress tensor throughout large proportion water column. The present study provides mean vertical profiles velocity, intensity and integral lengthscale along streamwise, spanwise direction current. Based on our results considering tidal-stream convertor...
Breaking probabilities and breaking wave height distributions (BWHDs) in deep, intermediate, shallow water depth are compared, a generic parameterization is proposed to represent the observed variability of parameters as function nondimensional depth. In intermediate deep water, where waves different scales may have markedly probabilities, BWHD frequency validated with intermediate‐depth observational data. The current study focuses on frequencies between 0.55 3.45 times peak f p . For...
A new wave‐breaking dissipation parameterization designed for phase‐averaged spectral wave models is presented. It combines breaking basic physical quantities, namely, the probability and rate per unit area. The energy lost by waves first explicitly calculated in space before being distributed over relevant components. transition from deep to shallow water made possible using a area of that varies with height, wavelength depth. This implemented WAVEWATCH III modeling framework, which applied...
This paper presents results from an experiment designed to improve the understanding of relationship between extreme breaking waves and their mechanical loading on heritage offshore lighthouses. The experiment, conducted at La Jument, iconic French lighthouse, featured several records wave, current structure accelerations acquired during severe storm conditions, with individual as high 24 m. Data analysis focuses a event marked by strong peak in horizontal measured inside Jument. Thanks...
Two coupled four-beam acoustic Doppler current profilers were used to provide simultaneous and independent measurements of the turbulent kinetic energy (TKE) dissipation rate ε TKE production <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:mrow> <mml:mi mathvariant="script">P</mml:mi> </mml:mrow> </mml:math> over a 36 h long period at highly energetic tidal site in Alderney Race. The eight-beam arrangement enabled evaluation six components Reynolds stress...
A pair of self-contained acoustic Doppler current profilers (SC-ADCPs) operating with different frequencies were moored on a muddy sea bottom at about 20 m depth in the Bay Vilaine off French Atlantic coast. With their beams oriented upwards, SC-ADCPs ensonified most water column. The results several months situ recorded echo intensity data spanning 2 years (2003 to 2004) from dual-frequency ADCPs are presented this paper. aim was estimate suspended particle mass concentration and mean size....
Some properties of chaotic dynamical systems can be probed through features recurrences, also called analogs. In practice, analogs are nearest neighbours the state a system, taken from large database catalog. Analogs have been used in many atmospheric applications including forecasts, downscaling, predictability estimation, and attribution extreme events. The distances to target condition performances analog applications. These viewed as random variables, their probability distributions...
Abstract Analogs are nearest neighbors of the state a system. By using analogs and their successors in time, one is able to produce empirical forecasts. Several analog forecasting methods have been used atmospheric applications tested on well-known dynamical systems. Such often without reference theoretical connections with Yet, can be related equations system interest. This study investigates properties different strategies by taking local approximations system’s dynamics. We find that...
This work presents the analysis of wave and turbulence measurements collected at a tidal energy site. A new method is introduced to produce more consistent rigorous estimations velocity fluctuations power spectral densities. An analytical function further proposed fit observed spectra could be input numerical models predicting production structural loading on turbines. Another approach developed correct for effect Doppler noise high frequencies The time series combining turbulent...