Consulta: creatorFacets:"Pairaud, Ivane"
Registros recuperados: 41
Data/hora: 09/06/2024 15:46:54

Impacts of climate change on coastal benthic ecosystems: assessing the current risk of mortality outbreaks associated with thermal stress in NW Mediterranean coastal areas
Provedor de dados: 5
Autores: Pairaud, Ivane; Bensoussan, Nathaniel; Garreau, Pierre; Faure, Vincent; Garrabou, Joaquim.
In the framework of climate change, the increase in ocean heat wave frequency is expected to impact marine life. Large-scale positive temperature anomalies already occurred in the northwestern Mediterranean Sea in 1999, 2003 and 2006. These anomalies were associated with mass mortality events of macrobenthic species in coastal areas (0–40 m in depth). The anomalies were particularly severe in 1999 and 2003 when thousands of kilometres of coasts and about 30 species were affected. The aim of this study was to develop a methodology to assess the current risk of mass mortality associated with temperature increase along NW Mediterranean continental coasts. A 3D regional ocean model was used to obtain the temperature conditions for the period 2001–2010, for...
Tipo: Text
Palavras-chave: Climate change; Benthic communities; Ocean modelling; Model validation; Impact mapping.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00171/28210/27707.pdf

Observation of Mesoscale Instabilities of the Northern Current in the North Western Mediterranean Sea: a combined study using Gliders, Surface Drifters, Moving Vessel Profiler and Vessel Data in the Ligurian
Provedor de dados: 5
Autores: Pairaud, Ivane; Garreau, Pierre; Le Berre, David; Fernandez, Delphine; Bellomo, Lucio; Garnier, Valerie.
The Northern Current (NC) is a branch of the general North-Western Mediterranean cyclonic circulation extending from the Ligurian to the Catalan Sea (Millot, Dynamics of Atmospheres and Oceans, vol. 15, 1991). In winter and early spring, instabilities of this slope current are intense and can generate eddies, meanders and filaments. The study of mesoscale structures is crucial in the coastal area because of their physical and biogeochemical impact on ecosystems. They play a role in water, chemicals and nutrients transport, vertical mixing and possible trapping of biological materials. Results from a combined observational effort put forth in March 2012 during the IMEDIA cruise dedicated to eddy tracking are presented. This work aims at providing...
Tipo: Text
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00410/52142/52859.pdf

Intrusion of Rhone River diluted water into the Bay of Marseille: Generation processes and impacts on ecosystem functioning
Provedor de dados: 5
Autores: Fraysse, Marion; Pairaud, Ivane; Ross, Oliver N.; Faure, Vincent M.; Pinazo, Christel.
The Rhone River provides the largest inputs of terrestrial freshwater and nutrients into the Mediterranean Sea. The Rhone River diluted water intrusions into the Bay of Marseille were investigated, examining their physical generation processes and associated biogeochemical impact by using in situ observations, remote sensing data, and a three-dimensional physical/biogeochemical coupled model. During our study period from 2007 to 2011, Rhone River intrusions occurred on average 7.6 times per year and affected more frequently the northern part of the bay. A classification of intrusion events in three categories is proposed (short lived, big, and small) as a function of their duration and spatial extent. The intrusions appeared to be driven by: (i) wind...
Tipo: Text
Palavras-chave: Three-dimensional physical; Biogeochemical modeling; Rhone River intrusions; Biogeochemical mass balances; Coastal processes; Bay of Marseille (Mediterranean Sea).
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00245/35612/34135.pdf

METROC : modélisation idéalisée de substances dissoutes et particulaires rejetées en rade de Marseille
Provedor de dados: 5
Autores: Jany, Cassandre; Pairaud, Ivane; Thouvenin, Benedicte; Verney, Romaric.
In the context of the METROC project, academic modelling of dissolved and particulate materials were done with the MARS3D model. Considering the dissolved materials, we calculated evacuation times and residence times. Then, we add minimal dilution and percentile maps to assimilate the modelling and the realistic dissolved metal discharge. Considering the particulate materials, we did balance sheets for material exported, sedimenting or staying in water for three different phases (whole modelling 13 October – 31 December 2008, flood situation and resuspension situation). Maps of Marseille roadstead complete that information and allow visualising the principal deposition area. We will continue this work by modelling reel material such as Lead.
Tipo: Text
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00090/20088/17724.pdf

Cold-water coral ecosystems in Cassidaigne Canyon: An assessment of their environmental living conditions
Provedor de dados: 5
Autores: Fabri, Marie-claire; Bargain, Annaelle; Pairaud, Ivane; Pedel, Laura; Taupier-letage, I.
The Cassidaigne canyon is one of the two canyons (together with Lacaze-Duthiers) of the French Mediterranean coast in which cold-water corals have settled and formed large colonies, providing a structural habitat for other species. Nevertheless, the communities settled in the Cassidaigne canyon are physically impacted by discharges of bauxite residues.  New information on the distribution of the species Madrepora oculata and the associated species diversity in Cassidaigne canyon was provided by videos and photos acquired in 2013. An area investigated at 515 m depth harbored a high density of small colonies of M. oculata. The water column structure of the area was described by using a CTD transect deployed along the axis of the canyon. High resolution (10 m...
Tipo: Text
Palavras-chave: Habitat suitability model Biodiversity Madrepora oculata Species distribution mapping Bauxite residues Mediterranean Sea (N43 degrees; E5 degrees 30 ').
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00343/45373/44876.pdf

Regional assessment of altimetry products in the NW Med : Comparison to in-situ data and model outputs
Provedor de dados: 5
Autores: Dussurget, Renaud; Pairaud, Ivane; Dufau, Claire; Charria, Guillaume; Garreau, Pierre; Garnier, Valerie.
In this preliminary study, we investigate the characteristics of a standard regional NRT product &amp; an experimental L3 coastal sea-level product from PISTACH data, and assess their combined use with in-situ data (drifters) and a regional model. The results suggest that: •J2 NRT data shows some consistent behaviour with drifter data, despite biases •RED3 retracking : better coastal coverage (&gt;5%) •NORMED model has an excess of energy at the mesoscales, possibly arising from the lack of energy dissipation towards the finer scales
Tipo: Text
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00410/52143/52860.pdf

Fusion of Sun-Synchronous and Geostationary Images for Coastal and Ocean Color Survey Application to OLCI (Sentinel-3) and FCI (MTG)
Provedor de dados: 5
Autores: Peschoud, Cecile; Minghelli, Audrey; Mathieu, Sandrine; Lei, Manchun; Pairaud, Ivane; Pinazo, Christel.
Open ocean and coastal area monitoring requires multispectral satellite images with a middle spatial resolution ({\sim !300 {text{m}}}) and a high temporal repeatability ({\sim !1 {text{h}}}) . As no current satellite sensors have such features, the aim of this study is to propose a fusion method to merge images delivered by a low earth orbit (LEO) sensor with images delivered by a geostationary earth orbit (GEO) sensor. This fusion method, called spatial spectral temporal fusion (SSTF), is applied to the future sensors—Ocean and Land Color Instrument (OLCI) (on Sentinel-3) and Flexible Combined Imager (FCI) (on Meteosat Third Generation) whose images were simulated. The OLCI bands, acquired at t _{0} , are divided by the oversampled corresponding FCI band...
Tipo: Text
Palavras-chave: Fusion; Image simulation; Meteosat Third Generation (MTG); Ocean color; Ocean and Land Color Instrument.
Ano: 2017
URL: https://archimer.ifremer.fr/doc/00343/45413/49041.pdf

Mastodon-2D. Deployment in Mediterranean Sea During Upcast field Experiment
Provedor de dados: 5
Autores: Pairaud, Ivane; Garnier, Valerie; Le Berre, David; Ravel, Christophe; Leizour, Stephane; Lazure, Pascal; Garreau, Pierre.
Tipo: Text
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00412/52310/53080.pdf

Air-Sea Turbulent Fluxes From a Wave-Following Platform During Six Experiments at Sea
Provedor de dados: 5
Autores: Bourras, Denis; Cambra, Remi; Marié, Louis; Bouin, Marie-noëlle; Baggio, Lucio; Branger, Hubert; Beghoura, Houda; Reverdin, Gilles; Dewitte, Boris; Paulmier, Aurélien; Maes, Christophe; Ardhuin, Fabrice; Pairaud, Ivane; Fraunié, Philippe; Luneau, Christopher; Hauser, Danièle.
Turbulent fluxes at the air‐sea interface are estimated with data collected in 2011 to 2017 with a low‐profile platform during six experiments in four regions. The observations were carried out with moderate winds (2‐10 m s‐1) and averaged wave heights of 1.5 m. Most of the time, there was a swell, with an averaged wave age (the ratio between wave phase speed and wind speed) being equal to 2.8±1.6. Three flux calculation methods are used, namely the eddy‐covariance (EC), the inertial‐dissipation (ID), and the bulk methods. For the EC method, a spectral technique is proposed to correct wind data from platform motion. A mean bias affecting the friction velocity (u*) is then evaluated. The comparison between EC u* and ID u* estimates suggests that a constant...
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00503/61436/65156.pdf

Assessing climate change impacts on marine biodiversity conservation: The case study of mass mortality events in the NW Mediterranean basin
Provedor de dados: 5
Autores: Garrabou, Joachim; Bensoussan, Nathaniel; Pairaud, Ivane; Garreau, Pierre; Somot, Samuel; Linares, Cristina; Kersting, Diego K.; Cebrian, Emma; De Caralt, Sonia; Kipson, Silvija; Ledoux, Jean-baptiste; Frleta-valic, Masa.
The Mediterranean is considered a biodiversity hot‐spot. The Mediterranean represents less than 1% of global ocean surface, but it hosts about 20% of marine biodiversity with a high level of endemic species. The Mediterranean is also considered a hot‐spot for climate change with expected warming over the average along with a very likely increase in the occurrence of heat waves in climate change. In fact Mediterranean waters have been already significantly warming up during the last decades, and this trend is expected to increase during the rest of the 21st century. Mediterranean marine ecosystems are already displaying clear responses to warming such as pelagic productivity, shifts in species’ geographical distributions, modifications of migratory patterns...
Tipo: Text
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00164/27558/25724.pdf

Development of a 3D Coupled Physical-Biogeochemical Model for the Marseille Coastal Area (NW Mediterranean Sea): What Complexity Is Required in the Coastal Zone?
Provedor de dados: 5
Autores: Fraysse, Marion; Pinazo, Christel; Faure, Vincent Martin; Fuchs, Rosalie; Lazzari, Paolo; Raimbault, Patrick; Pairaud, Ivane.
Terrestrial inputs (natural and anthropogenic) from rivers, the atmosphere and physical processes strongly impact the functioning of coastal pelagic ecosystems. The objective of this study was to develop a tool for the examination of these impacts on the Marseille coastal area, which experiences inputs from the Rhone River and high rates of atmospheric deposition. Therefore, a new 3D coupled physical/biogeochemical model was developed. Two versions of the biogeochemical model were tested, one model considering only the carbon (C) and nitrogen (N) cycles and a second model that also considers the phosphorus (P) cycle. Realistic simulations were performed for a period of 5 years (2007-2011). The model accuracy assessment showed that both versions of the...
Tipo: Text
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00170/28090/26682.pdf

Small-scale connectivity of coralligenous habitats: insights from a modelling approach within a semi-opened Mediterranean bay
Provedor de dados: 5
Autores: Rossi, Vincent; Lo, Madiop; Legrand, Terence; Ser-giacomi, Enrico; De Jode, Aurélien; Thierry De Ville D’avray, Laure; Pairaud, Ivane; Faure, Vincent; Fraysse, Marion; Pinazo, Christel; Chenuil, Anne.
Habitat connectivity is central to several key evolutionary and ecological processes, having implications for the spatial structuring of marine populations. For benthic species that have no or little mobility as adults, connectivity is evaluated by analyzing the dispersal of propagules across the seascape. We investigate fine-scale connectivity of coralligenous habitats in Marseille Bay (located in the north-western Mediterranean) sea using high-resolution cartography and a particle-tracking model ran over a range of parameters derived from the biological traits of potential target species. We present annual and seasonal means of various connectivity diagnostics measuring the retention and exchange of propagules among coralligenous patches. A synthetic...
Tipo: Text
Palavras-chave: Habitat connectivity; Larval dispersal; Coralligenous assemblages; Benthic organisms; Oceanic circulation; Lagrangian modeling; Population genetics; Community composition.
Ano: 2021
URL: https://archimer.ifremer.fr/doc/00680/79225/81737.pdf

Pressions et état de la contamination chimique marine dans le voisinage d'une grande ville côtière méditerranéenne, le cas de Marseille
Provedor de dados: 5
Autores: Sauzade, Didier; Andral, Bruno; Gonzalez, Jean-louis; Pairaud, Ivane; Verney, Romaric; Zebracki, Mathilde; Cadiou, Jean-francois; Boissery, Pierre.
Marine pollution is one of the priority issues of the Mediterranean environment. This pollution comes from multiple sources including large coastal cities which are considered as hot-spots. The METROC project objective is to assess gross and net chemical contaminant flows related to large Mediterranean coastal cities, with a first application to the Marseilles area. The methodology consists of i) assessing the present state of the chemical contamination of the coastal environment; ii) assessing inputs to the sea from sewage, small rivers and storm water run-off; and iii) modelling the fate of some key contaminants, in order to attempt to establish a balance between inputs and exports towards the open sea. This short article presents a synthesis on these...
Tipo: Text
Ano: 2009
URL: http://archimer.ifremer.fr/doc/00070/18164/15721.pdf

Generation of harmonics and sub-harmonics from an internal tide in a uniformly stratified fluid: numerical and laboratory experiments
Provedor de dados: 5
Autores: Pairaud, Ivane; Staquet, Chantal; Sommeria, Joel; Mahdizadeh, Mahdi M.
This paper focuses on the internal tide emitted from a continental slope in a uniformly stratified fluid. Results from numerical simulations using the MITgcm and from laboratory experiments performed on the Coriolis platform in Grenoble are compared. Due to their peculiar dispersion relation, internal gravity waves organize into localized beams of energy. We show that the beam structure is well-predicted by the viscous theory of [10], assuming that the internal gravity wave field is emitted by a horizontally oscillating cylinder whose radius is the radius of curvature of the topography at the beam emission. The wave beam can bear a sub-harmonic parametric instability whose vertical scale is recovered from resonant interaction theory. Reflection of the wave...
Tipo: Text
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00038/14915/12398.pdf

Collaborative Database to Track Mass Mortality Events in the Mediterranean Sea
Provedor de dados: 5
Autores: Garrabou, Joaquim; Gómez-gras, Daniel; Ledoux, Jean-baptiste; Linares, Cristina; Bensoussan, Nathaniel; López-sendino, Paula; Bazairi, Hocein; Espinosa, Free; Ramdani, Mohamed; Grimes, Samir; Benabdi, Mouloud; Souissi, Jamila Ben; Soufi, Emna; Khamassi, Faten; Ghanem, Raouia; Ocaña, Oscar; Ramos-esplà, Alfonso; Izquierdo, Andres; Anton, Irene; Rubio-portillo, Esther; Barbera, Carmen; Cebrian, Emma; Marbà, Nuria; Hendriks, Iris E.; Duarte, Carlos M.; Deudero, Salud; Díaz, David; Vázquez-luis, Maite; Alvarez, Elvira; Hereu, Bernat; Kersting, Diego K.; Gori, Andrea; Viladrich, Núria; Sartoretto, Stephane; Pairaud, Ivane; Ruitton, Sandrine; Pergent, Gérard; Pergent-martini, Christine; Rouanet, Elodie; Teixidó, Nuria; Gattuso, Jean-pierre; Fraschetti, Simonetta; Rivetti, Irene; Azzurro, Ernesto; Cerrano, Carlo; Ponti, Massimo; Turicchia, Eva; Bavestrello, Giorgio; Cattaneo-vietti, Riccardo; Bo, Marzia; Bertolino, Marco; Montefalcone, Monica; Chimienti, Giovanni; Grech, Daniele; Rilov, Gil; Tuney Kizilkaya, Inci; Kizilkaya, Zafer; Eda Topçu, Nur; Gerovasileiou, Vasilis; Sini, Maria; Bakran-petricioli, Tatjana; Kipson, Silvija; Harmelin, Jean G.
Tipo: Text
Palavras-chave: Climate change; Ocean warming; Marine heat wave impacts; Marine disease; Marine conservation and protection.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00592/70448/68557.pdf

Operational evaluation of the Mediterranean Monitoring and Forecasting Centre products: Implementation and Results
Provedor de dados: 5
Autores: Tonani, Marina; Nilsson, J.a.u; Lyubartsev, Vladyslav; Grandi, Alessandro; Aydogdu, A.; Azzopardi, Joel; Bolzon, G.; Bruschi, A.; Drago, Aldo; Garau, T.; Gatti, Julie; Gertman, Isaac; Goldman, R.; Hayes, Dan; Korres, Gerrakimos; Lorente, P.; Malacic, Vlado; Mantziafou, Anneta; Nardone, G.; Olita, Antonio; Ozsoy, E.; Pairaud, Ivane; Pensieri, S.; Perivoliotis, L.; Petelin, Boris; Ravaioli, M.; Renault, L.; Sofianos, S.; Sotillo, M.g.; Teruzzi, A.; Zodiatis, George.
A web-based validation platform has been developed at the Istituto Nazionale di Geofisica e Vulcanologia (INGV) for the Near Real Time validation of the MyOcean-Mediterranean Monitoring and Forecasting Centre products (Med-MFC).   A network for the collection of the in-situ observations, the nested sub-basin forecasting systems model data (provided by the partners of the Mediterranean Operational Oceanography Network, MOON) and the Sea Surface Temperature (SST) satellite data has been developed and is updated every day with the new available data. The network collects temperature, salinity, currents and sea level data. The validation of the biogeochemical forecast products is done by use of ocean colour satellite data produced for the Mediterranean Sea....
Tipo: Text
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00226/33687/32059.pdf

Behaviour and fate of urban particles in coastal waters: Settling rate, size distribution and metals contamination characterization
Provedor de dados: 5
Autores: Oursel, B.; Garnier, C.; Pairaud, Ivane; Omanovic, D.; Durrieu, G.; Syakti, A. D.; Le Poupon, C.; Thouvenin, Benedicte; Lucas, Y.
The evaluation of contaminant net fluxes from the coast to the open sea requires the study of terrigeneous particles behaviour and fate. We studied the particles issued from two small coastal rivers whose waters are mixed with treated wastewater (TWW) coming from the Marseille wastewater treatment plant (WWTP) just before discharge to the Mediterranean Sea. An experimental device was developed and used to investigate particles settling rates, size distribution and metallic contamination when mixing with seawater. The particles were sampled in flood deposits of rivers and outlets during rainy periods and in the outlet water during dry periods. The flood deposits were mainly composed of 50–200 μm-sized particles, higher metals content being observed in the...
Tipo: Text
Palavras-chave: Particles contamination; Urban rivers; Coastal zone; TWW; Hydro sedimentation modelling.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00169/28066/27277.pdf

National observation infrastructures in a European framework: COAST-HF A fixed-platform network along French coasts
Provedor de dados: 5
Autores: Charria, Guillaume; Schmitt, François; Artigas, Felipe; Berthebaud, Eric; Bonnat, Armel; Bourrin, François; Bozec, Yann; Cariou, Thierry; Claquin, Pascal; Conan, Pascal; Coppola, Laurent; Delalée, Franck; Facq, Jean-valery; Farcy, Patrick; Ferreira, Sophie; Garcia, Fabrice; Grisoni, Jean-michel; Jacqueline, Franck; Jacquet, Matthias; Lefebvre, Alain; Leredde, Yann; Le Roux, Jean-francois; Mas, Sébastien; Mostajir, Behzad; Mousseau, Laure; Pairaud, Ivane; Petton, Sebastien; Pouvreau, Stephane; Quemener, Loic; Ravel, Christophe; Raimbault, Patrick; Repecaud, Michel; Retho, Michael; Rimmelin-maury, Peggy; Riou, Philippe; Savoye, Nicolas; Souchu, Philippe; Verney, Romaric; Vuillemin, Renaud.
COAST-HF (Coastal OceAn observing SysTem – High Frequency) is a French national observation network of the physical and biogeochemical dynamics of the coastal ocean, at high frequency. COAST-HF aims at understanding and analysing changes of contrasted coastal ecosystems at different temporal scales from extreme or intermittent high frequency (hour, day) events to multi-year trends. Since several years (from 2000 for the longest time series in Bay of Brest), the network extends along the English Channel, Atlantic and Mediterranean French coasts through 14 fixed platforms instrumented for the in situ high-frequency (≤ 1h) observations. Several French research institutes (IFREMER, CNRS, Marine Universities) are operating these systems. The organization of...
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00635/74723/74708.pdf

Study of high frequency measurements from the MesuRho mooring
Provedor de dados: 5
Autores: Fuchs, Rosalie; Pairaud, Ivane.
The high frequency MesuRho station, part of the MAREL network and located at the mouth of the Rhone River is presented. Measures sometimes show bias signs, drift or double, so that a graphical interface was implemented to quickly visualize data and eventually correct them. Original data set and corrected data for 2009-2013 are presented, the methods of corrections provided are detailed. Finally an example of a storm event study (under strong south east wind) between the 4th and the 7th of March 2013 is presented and some prospects to improve data management are proposed.
Tipo: Text
Palavras-chave: MesuRho; Code qualité; Correction des données; Analyse et traitement de données; Filtrage; ACP; Fourier; Évènement de vent d'Est; MesuRho; Quality code; Data corrections; Data and treatments analysis; Filtering; PCA; Fourier; Storm event.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00226/33697/32082.pdf

MENOR: a high-resolution (1.2 km) modeling of the North-Western Mediterranean Sea routinely run by the PREVIMER operational forecast system
Provedor de dados: 5
Autores: Garnier, Valerie; Pairaud, Ivane; Nicolle, Amandine; Alekseenko, Elena; Baklouti, Melika; Thouvenin, Benedicte; Lecornu, Fabrice; Garreau, Pierre.
IFREMER has encouraged for over 15 years the oceanographic modeling of sea waters all around the metropolitan French coasts in order to facilitate environmental coastal studies. In that context, the North-Western Mediterranean Sea confi guration (MENOR: 1.2 km – 60 vertical levels) has been introduced in the framework of Previmer operational forecasting system (http://www.previmer.org/en). This article gives an insight into the operational applications and scientific research using this MENOR configuration.
Tipo: Text
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00204/31519/29936.pdf

Documentation de l'interface MBI (Matlab Buoy Interface). Interface Matlab pour gestion des données issues de bouées in situ haute fréquence. Application à la bouée MAREL MesuRho
Provedor de dados: 5
Autores: Fuchs, Rosalie; Pairaud, Ivane.
In order to facilitate the visualization and exploitation of data from buoys MAREL network, a graphical interface named MBI (Matlab Buoy Interface) was developed with the Matlab software. The interface allows to quickly view the high-frequency data, view and edit the associated quality codes and provides analysis tools such as linear regression, various filters, Fourier series and principal components analysis. Correction methods for skewed data, drift phenomena and duplicates are also available. This document describes the features of the MBI, its use and provides the main technical interface details.
Tipo: Text
Palavras-chave: Matlab GUI; Matlab Buoy Interface (MBI); Fonctionnalités; Détails techniques; Guide utilisateur; Matlab GUI; Matlab Buoy Interface (MBI); Functionalities; Technical details; User guide.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00226/33693/32063.pdf

Geostationary Image Simulation on Coastal Waters Using Hydrodynamic Biogeochemical and Sedimentary Coupled Models
Provedor de dados: 5
Autores: Lei, Manchun; Minghelli, Audrey; Fraysse, Marion; Pairaud, Ivane; Verney, Romaric; Pinazo, Christel.
This study proposes a method to simulate the images of the future European geostationary sensor dedicated to ocean color sensor: the geostationary ocean color advanced permanent imager (GeoOCAPI), and it demonstrates the sensor capabilities to monitor the water composition throughout the day. The temporal variation of the coastal seascape is obtained from biogeochemical and hydrosedimentary models, the ocean-atmosphere radiance is obtained from the water and atmosphere radiative transfer model. The GeoOCAPI images are simulated with 400-m resolution, 18 spectral bands with associated signal-to-noise ratio (SNR) and with 1-h acquisition frequency, on the Gulf of Lion (Marseille, France) during a pollution event caused by the urban outfall of Cortiou in...
Tipo: Text
Palavras-chave: Geostationary ocean color advanced permanent imager (GeoOCAPI); Geostationary orbit; Image simulation; Ocean color.
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00363/47462/50154.pdf

Particle assemblage characterization in the Rhone river ROFI
Provedor de dados: 5
Autores: Many, Gael; Bourrin, Francois; Durrieu De Madron, Xavier; Pairaud, Ivane; Gangloff, Aurelien; Doxaran, David; Ody, Anouck; Verney, Romaric; Menniti, Christophe; Le Berre, David; Jacquet, Matthias.
An innovative experiment was carried out in the vicinity of the Rhône River mouth in February 2014. An instrumental package, composed of a CTD, a LISST-100 type B (1.25–250 μm) and a LISST-HOLO (20–2000 μm), was used to characterize the hydrological parameters and suspended particles properties (concentration, size, composition, shape and effective density) in the region of freshwater influence (ROFI) of the Rhône River. Besides, a coastal SLOCUM glider, equipped with a CTD and optical backscattering sensors at several wavelengths, was deployed to detail the spatial description of the hydrological parameters and some particle properties. Large river discharge (annual flood ~ 5000 m3 s− 1) and strong wind conditions favored the dispersal of the river plume...
Tipo: Text
Palavras-chave: Gulf of Lions; Rhone River; ROFI; Turbid structures; Particle properties; Glider.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00307/41809/41011.pdf

Rapport de Campagne. ESSAUV-BATHYCOR1. Août 2014
Provedor de dados: 5
Autores: Fabri, Marie-claire; Opderbecke, Jan; Pairaud, Ivane; Drogou, Michele.
L'objectif de la campagne était double : (1) réaliser différents tests : AUV et tests acoustiques ainsi que la cartographie de la zone du futur observatoire de neutrinos (2) réaliser la micro-cartographie du fond ainsi que l'acquisition de paramètres environnementaux hydrodynamiques dans une zone accidentée sur laquelle on trouve des écosystèmes marins vulnérables (canyons de Cassidaigne et du Planier). La réalisation de cartographies fines (résolution 2 m) dans une zone accidentée au moyen d'un AUV était un challenge technologique car cet engin autonome est conçu pour naviguer sur des zones planes. Habituellement les consignes de navigation utilisées sont de naviguer à 70 m d'altitude et d'utiliser une fréquence d'acquisition de 300Khz. Ses contraintes de...
Tipo: Text
Palavras-chave: Essais AUV; Bathymétrie fine; Courantologie; Tests acoustiques; Canyons; Méditerranée.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00233/34401/32807.pdf

MESURHO : a high frequency oceanographic buoy at the Rhone River mouth
Provedor de dados: 5
Autores: Cadiou, Jean-francois; Repecaud, Michel; Arnaud, Mireille; Rabouille, Christophe; Raimbault, Patrick; Radakovitch, Olivier; Meule, Samuel; Gaufres, Pierre; Pairaud, Ivane.
As the current main source of continental fresh water discharge in the Mediterranean Sea, the Rhone River inputs are a key forcing for ecosystems of the Gulf of Lions in the western basin. In order to better characterize the exchanges at this key interface, an oceanographic buoy has been installed at the Rhone River mouth in June 2009 for high frequency multiparameter measurements with bottom, water column and air sensors. Data are sent in near real time towards an onshore data center.
Tipo: Text
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00070/18161/15718.pdf

A new device to follow temporal variations of oxygen demand in deltaic sediments: the LSCE benthic station
Provedor de dados: 5
Autores: Toussaint, Flora; Rabouille, Christophe; Cathalot, Cecile; Bombled, Bruno; Abchiche, Abdel; Aouji, Oualid; Buchholtz, Gilles; Clemencon, Aurelien; Geyskens, Nicolas; Repecaud, Michel; Pairaud, Ivane; Verney, Romaric; Tisnerat-laborde, Nadine.
A new benthic station equipped with oxygen microelectrodes and environmental sensors was developed by Laboratoire des Sciences du Climat et de L’Environnement (LSCE) and Division Technique of the Institut National des Sciences de L’Univers (DT-INSU) to perform in situ time series monitoring of sediment oxygen demand, linked to the mineralization of organic matter. The time series typically cover periods of 2-3 months, with a base frequency of 1 set of oxygen profiles per day. The profiling head assessed the lateral heterogeneity of the sediment oxygen demand at the beginning of the time series over a 0.8-m long rectangle to discriminate spatial and temporal variability. A continuous recalibration is performed using a moored oxygen optode anchored to the...
Tipo: Text
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00230/34126/32597.pdf

Potential of High Spatial and Temporal Ocean Color Satellite Data to Study the Dynamics of Suspended Particles in a Micro-Tidal River Plume
Provedor de dados: 5
Autores: Ody, Anouck; Doxaran, David; Vanhellemont, Quinten; Nechad, Bouchra; Novoa, Stefani; Many, Gael; Bourrin, Francois; Verney, Romaric; Pairaud, Ivane; Gentili, Bernard.
Ocean color satellite sensors are powerful tools to study and monitor the dynamics of suspended particulate matter (SPM) discharged by rivers in coastal waters. In this study, we test the capabilities of Landsat-8/Operational Land Imager (OLI), AQUA&amp;TERRA/Moderate Resolution Imaging Spectroradiometer (MODIS) and MSG-3/Spinning Enhanced Visible and Infrared Imager (SEVIRI) sensors in terms of spectral, spatial and temporal resolutions to (i) estimate the seawater reflectance signal and then SPM concentrations and (ii) monitor the dynamics of SPM in the Rhone River plume characterized by moderately turbid surface waters in a micro-tidal sea. Consistent remote-sensing reflectance (Rrs) values are retrieved in the red spectral bands of these four satellite...
Tipo: Text
Palavras-chave: River plumes; Coastal waters; High resolution; Suspended particulate matter; Remote sensing.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00333/44408/44066.pdf

(Sub-)Mesoscale processes in North-Western Mediterranean Sea Observations and Modelling
Provedor de dados: 5
Autores: Garreau, Pierre; Garnier, Valerie; Pairaud, Ivane.
Tipo: Text
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00337/44841/44430.pdf

Report on the Mastodon2D mooring system
Provedor de dados: 5
Autores: Lazure, Pascal; Pairaud, Ivane; Leizour, Stephane; Puillat, Ingrid.
Temperature distributions on continental shelves (depth &lt; 150m) are often complex because the many physical processes induce very high spatial (both horizontal and vertical) and temporal variability. Temporal variability extends from a few tens of minutes for solitons (internal wave), a few hours for internal tide and inertial waves to a few days for upwelling or sub mesoscale dynamics. In the 1980s, satellites provided access to knowledge of surface temperatures. On the other hand, the internal temperature structure still requires in-situ measurements, which leads to the deployment of moorings at sea. These operations are often expensive and risky because the coastal zone is generally subject to intense activities such as fishing and sea conditions can...
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00630/74245/73875.pdf

MASSILIA: Modélisation de la baie de MArSeILLe : Influence des apports Anthropiques de la métropole sur l’écosystème marin
Provedor de dados: 5
Autores: Pinazo, Christel; Fraysse, Marion; Doglioli, Andrea; Faure, Vincent Martin; Pairaud, Ivane; Petrenko, Anne; Thouvenin, Benedicte; Tronczynski, Jacek; Verney, Romaric; Yohia, Christophe.
In the framework of sustainable development, the anthropogenic impact of large coastal cities on the marine ecosystem is a key issue. This project aimed to improve our knowledge in marine ecosystem response to the anthropogenic supplies (from rivers, sewage outflows and atmosphere) from large cities. In particular, the goal is to underline how the physical forcing decreases or increases the anthropogenic impact on the coastal ecosystem and the assessment of the chemical contaminant (PCB) inputs (from city to sea) and exports (from mid-sea to open sea).
Tipo: Text
Palavras-chave: Apports anthropiques; Baie de Marseille; Méditerranée nord-occidentale; Modélisation 3D; MARS3D; ECO3M; Couplage physique et biogéochimique; Anthropogenic supply; Bay of Marseille; North-Western Mediterranean Sea; 3D modelling; MARS3D; ECO3M; Physical-biogeochemical coupling.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00145/25592/23739.pdf

Optimisation échantillonnage in situ : Qualification des configurations méditerranéennes du modèle MARS3D
Provedor de dados: 5
Autores: Gatti, Julie; Pairaud, Ivane.
L'objectif de ce travail est de proposer une méthodologie de qualification des modèles hydrodynamiques côtiers et d'affiner la stratégie d'observation. Après une actualisation des connaissances sur l’hydrodynamique de la Méditerranée Nord occidentale, le travail a porté sur l’établissement d’une liste non-exhaustive des différentes observations disponibles à des fins de validation en Méditerranée Nord occidentale. Ensuite, une stratégie de validation a été proposée par une approche généraliste et appliquée à deux configurations de MARS3D en Méditerranée Nord occidentale : MENOR et RHOMA. Enfin, les résultats d’une campagne en mer d’intercomparaison des mesures d’un ADCP de coque et d’un ADCP tracté sur un "hydronef" ont été analysés afin de tester la...
Tipo: Text
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00028/13932/11105.pdf

Courantologie. Sous-région marine Méditerranée occidentale. Evaluation initiale DCSMM.
Provedor de dados: 5
Autores: Pairaud, Ivane; Desmare, Stéphanie; Gatti, Julie; Taupier-letage, Isabelle.
Tipo: Text
Palavras-chave: Méditerranée; Courants; Processus physiques; Circulation générale; Variabilité saisonnière; Courants de marée.
Ano: 2012
URL: https://archimer.ifremer.fr/doc/00330/44111/43682.pdf

Glider-Based Active Acoustic Monitoring of Currents and Turbidity in the Coastal Zone
Provedor de dados: 5
Autores: Gentil, Mathieu; Many, Gaël; Durrieu De Madron, Xavier; Cauchy, Pierre; Pairaud, Ivane; Testor, Pierre; Verney, Romaric; Bourrin, François.
The recent integration of Acoustic Doppler Current Profilers (ADCPs) onto underwater gliders changes the way current and sediment dynamics in the coastal zone can be monitored. Their endurance and ability to measure in all weather conditions increases the probability of capturing sporadic meteorological events, such as storms and floods, which are key elements of sediment dynamics. We used a Slocum glider equipped with a CTD (Conductivity, Temperature, Depth), an optical payload, and an RDI 600 kHz phased array ADCP. Two deployments were carried out during two contrasting periods of the year in the Rhone River region of freshwater influence (ROFI). Coastal absolute currents were reconstructed using the shear method and bottom tracking measurements, and...
Tipo: Text
Palavras-chave: Glider; Optics; Acoustics; Satellite; Coastal hydrodynamics; Suspended particulate matter; Particulate fluxes; Gulf of Lions; Mediterranean.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00648/76039/76962.pdf

Impact of an intrusion by the Northern Current on the biogeochemistry in the eastern Gulf of Lion, NW Mediterranean
Provedor de dados: 5
Autores: Ross, Oliver N.; Fraysse, Marion; Pinazo, Christel; Pairaud, Ivane.
We present the results from the RHOMA2011-LEG2 campaign that took place in the eastern Gulf of Lion from 7 to 17 Oct 2011 and combine them with remote sensing observations and results from a 3D coupled hydrodynamic-biogeochemical model to study an intrusion event of the Northern Current (NC) onto the continental shelf in the Gulf of Lion (NW Mediterranean). Our analysis shows that during the intrusion, the previously upwelled nutrient-rich water present on the shelf is replaced by warmer and mostly oligotrophic NC water within a matter of 2–3 days. This has a marked impact on the local biogeochemistry in the Gulf with pre-intrusion Chl-a concentrations in the surface layer of over 0.5 mg m−3 dropping to near the detection limit within less than 72 h. The...
Tipo: Text
Palavras-chave: Northern Current; Gulf of Lion; Intrusion; Continental shelf; Biogeochemical modelling; Regime shift.
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00302/41359/40644.pdf

Unexpected spatial impact of treatment plant discharges induced by episodic hydrodynamic events: Modelling Lagrangian transport of fine particles by Northern Current intrusions in the bays of Marseille (France)
Provedor de dados: 5
Autores: Millet, Bertrand; Pinazo, Christel; Banaru, Daniela; Pages, Remi; Guiart, Pierre; Pairaud, Ivane.
Our study highlights the Lagrangian transport of solid particles discharged at the Marseille Wastewater Treatment Plant (WWTP), located at Cortiou on the southern coastline. We focused on episodic situations characterized by a coastal circulation pattern induced by intrusion events of the Northern Current (NC) on the continental shelf, associated with SE wind regimes. We computed, using MARS3D-RHOMA and ICHTHYOP models, the particle trajectories from a patch of 5.104 passive and conservative fine particles released at the WWTP outlet, during 2 chosen representative periods of intrusion of the NC in June 2008 and in October 2011, associated with S-SE and E-SE winds, respectively. Unexpected results highlighted that the amount of particles reaching the...
Tipo: Text
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00439/55027/56458.pdf

Preface of special issue of MERMEX project: Recent advances in the oceanography of the Mediterranean Sea
Provedor de dados: 5
Autores: Sempere, Richard; Guieu, Cecile; Pairaud, Ivane; De Madron, Xavier Durrieu.
Tipo: Text
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00433/54469/55844.pdf

Flood inputs in a Mediterranean coastal zone impacted by a large urban area: Dynamic and fate of trace metals
Provedor de dados: 5
Autores: Oursel, B.; Garnier, C.; Zebracki, Mathilde; Durrieu, G.; Pairaud, Ivane; Omanović, D.; Cossa, Daniel; Lucas, Yves.
Trace elements and organic carbon inputs to the Mediterranean sea from an urbanized area (Marseille city) were studied and characterized during flood events. Inputs were brought to the sea by two small coastal rivers whose waters were mixed together and also with treated wastewaters (TWW) just before discharge. The monitoring of the rivers during flood events showed the high temporal dynamics of water flow, suspended particulate matter (SPM), organic carbon and trace metals concentrations, typical of small coastal Mediterranean rivers and requiring an appropriate sampling strategy. Dissolved/particulate partition coefficient (log Kd) in rivers during floods remained quasi-constant for a given trace element, but differed from one element to another...
Tipo: Text
Palavras-chave: WWTP; Metals contamination; Coastal zone; Flood events; Mediterranean Sea; Small rivers.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00206/31761/30171.pdf

Rapport des campagnes TURBIDENT Leg1 (Mai 2018) &amp; Leg2 (Octobre 2018)
Provedor de dados: 5
Autores: Pairaud, Ivane; Fuchs, Rosalie.
This report reviews the data obtained during Leg1 and Leg2 of the TURBIDENT oceanographic campaign (May-October 2018) carried out in the Iles d'Or (Toulon) area to the Banc des Blauquières (Cassis), within the framework of the ANR ASTRID Turbdident. The objective of this campaign was to acquire an innovative data set providing relevant information on the ocean surface layer under the illumination zone of the MIO HF radar, in particular sub-surface current profiles obtained using acoustic Doppler current meters (ADCP) operating in a stabilised manner below the surface from an autonomous underwater vehicle (AUV) from Ifremer, and temperature profiles obtained using low-cost thermistor lines developed in-house, in addition to more conventional measurements of...
Tipo: Text
Palavras-chave: Turbident; Mastodon-2D; Courants; Mouillage ADCP; ADCP tracté; AUV; Iles d’Or (Toulon); Banc des Blauquières (Cassis); Méditerranée.
Ano: 2021
URL: https://archimer.ifremer.fr/doc/00674/78596/80901.pdf

Sediment transport in the Bay of Marseille : Role of extrem events.
Provedor de dados: 5
Autores: Verney, Romaric; Jany, Cassandre; Thouvenin, Benedicte; Pairaud, Ivane; Vousdoukas, Michalis I.; Pinazo, Christel; Ardhuin, Fabrice; Cann, Philippe.
Human pressures on ecosystems have increased significantly over the last decades, and especially Mediterranean coasts are strongly impacted by the development of big cities and industrialized area, such as the Bay of Marseille. Prior to any investigations on ecological or contamination impacts, it was necessary to understand sediment dynamics and its response to natural extreme events such as storm or heavy rainfall events. In situ observations were dedicated to understand the behavior of bed sediments, and their spatial distribution. A benthic station was deployed for three months to observe the impact of extreme events on hydrodynamics and sediment dynamics in a critical zone of the study area. These measurementswere used to calibrate and validate the...
Tipo: Text
Palavras-chave: Sediment dynamics; Large coastal cities; Urban pressure; Extreme events; Wave; Rainfall; Marseille.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00204/31515/29929.pdf

Partenariat Ifremer – Agence de l’Eau Rhône Méditerranée et Corse : Recherche – Surveillance – Expertise. 15 années au service de la Méditerranée
Provedor de dados: 5
Autores: Andral, Bruno; Fiandrino, Annie; Roque D'Orbcastel, Emmanuelle; Pairaud, Ivane; Galgani, Francois; Gonzalez, Jean-louis; Bouchoucha, Marc.
L’Ifremer et l’Agence de l’Eau Rhône Méditerranée et Corse ont instruit en 2005 une Convention Cadre qui est venue renforcer et encadrer le partenariat étroit établi depuis 1995, au travers d’actions comme la mise en oeuvre de réseaux régionaux (Réseau Intégrateurs Biologiques, Réseau de Suivi Lagunaire) ou la réalisation de la plateforme de modélisation numérique.  Cette convention s’inscrit dans les objectifs du contrat quadriennal de l’Ifremer pour apporter les connaissances nécessaires au traitement des questions concrètes soulevées par l’activité socioéconomique et valoriser l’expérience et le savoir-faire de l’Ifremer en menant une politique de partenariat au niveau régional. Le présent rapport dresse le bilan de ces 15 années de partenariat,...
Tipo: Text
Palavras-chave: Partenariat Agence de l’Eau RM&amp;C; Recherche et développement; Surveillance; Avis expertise.
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00116/22711/20451.pdf

MASSILIA Project. Modelling of the Bay of Marseille : Impact of the Anthropogenic Supply on the marine coastal ecosystem
Provedor de dados: 5
Autores: Pinazo, Christel; Doglioli, Andrea; Faure, Vincent; Fraysse, Marion; Ross, Oliver; Pairaud, Ivane; Petrenko, Anne; Thouvenin, Benedicte; Tronczynski, Jacek; Verney, Romaric; Yohia, Christophe.
Tipo: Text
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00292/40337/38857.pdf