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List of projects (see below for project description)
 
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  • ALGOPOL (M. Chami): Development of an atmospheric correction algorithm over the open ocean using the polarized and directional measurements of the PARASOL satellite sensor (CNES)

  • BELCOLOUR-2 (K. Ruddick, at LOV: D. Doxaran): Optical remote sensing of coastal waters

  • BIOCAREX (D. Antoine): Daily variability of optics and biogeochemestry in the opean ocean

  • Biopatterns (F. D'Ortenzio, co-PI: J. Uitz): Phytoplankton spatio-temporal variability

  • BOUSSOLE (D. Antoine) : Buoy for the long-term acquisition of time series optical data

  • FLUXSAT (D. Doxaran) : Estimation of solid fluxes at the Rhône River mouth based on field autonomous and ocean colour remote sensing data

  • GOYA (D. Doxaran): Dynamics of the Yangtze river plume (China) based on MERIS, MODIS and GOCI ocean colour satellite data

    HIGHROC (PI: K. Ruddick, local PI: D. Doxaran): HIGH spatial and temporal Resolution Ocean Colour products and services

  • MALINA (M. Babin): How changes in ice cover, permafrost and solar radiation impact on biodiversity and biogeochemical fluxes in the Arctic Ocean?

  • MCGS (C. Mazeran, at LOV: M. Chami): Project Marine Collaborative Ground Segment

  • OSIFIOST (G. Allais, at LOV: M. Chami): Simulation tool for optical underwater images formation in turbid medium

  • OSS2015 (P.I. at LOV: D. Antoine): R&D activities for the development of new and innovative marine biogeochemistry products in the ocean

  • PABIM (F. D'Ortenzio): Plateformes Autonomes en Biogéochimie : Instrumentations et Mesures

  • PABO (H. Claustre): Plateformes Autonomes et Biogéochimie Océanique

  • POLVSM (M. Chami): Development of an instrument able to measure the polarized volume scattering functions of marine particles in coastal waters

  • PRONUTS (F. D'Ortenzio): Flotteurs profileurs pour les sels nutritifs

  • PROVAL (E. Leymarie): Use of profiling floats for validation of ocean color satellite products

  • PROVPANACHE (D. Doxaran): Use of physical and bio-optical measurements onboard autonomous profiling floats to study the dynamics of river plumes

  • REMOCEAN (H. Claustre): remotely-sensed biogeochemical cycles in the Ocean

  • SEASWIR (K. Els, PI at LOV D. Doxaran): Optical properties of turbid waters in the shortwave infrared spectral region and implications for ocean colour remote sensing

  • VASQUE (H. Claustre): Véhicule Autonome de Surveillance de la Qualité des Eaux

 
 
Ongoing research projects
 
 
remOcean

remotely-sensed biogeochemical cycles in the Ocean

Project leader: Hervé Claustre

Aiming to better understand biogeochemical cycles, the project seeks to develop a new generation of autonomous platforms. With so-called profiling floats oceanic key areas are targeted in order to collect data on their physical, chemical and bio-optical properties. The in real-time obtained measurements, combined with observations on ocean color by satellite imagery, will particularly contribute to the understanding of the role of phytoplankton in regulating the carbon cycle of the oceans.

For more information on this five-years project (2010-2015), funded by the European Research Council, please visit the OAO-remOcean website

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VASQUE

Véhicule Autonome de Surveillance de la Qualité des Eaux
Project leader : Yann Lepage (ACSA)
Project leader at LOV : Hervé Claustre

The project aims a particular application of underwater gliders of the SeaExplorer type, eventually equipped with a propulsion system. Such gliders are particularly adapted for coastal zones and shallow marine environments and the implementation of specific sensors allows continuous measurements of seawater quality to be performed. In this context, our group contributes to the development of the sensors for the monitoring of (harmful) algal blooms as well as of jellyfish.

This project, collaboration with private companies and academic centers, is funded by the French Ministry of Economics, Industries and Employment.

 
BOUSSOLE

Buoy for the long-term acquisition of time series optical data
Project leader: David Antoine

The Marine Optics and Remote Sensing Lab is involved in the development of a new platform dedicated to optical observations that will permit the measurement of time seris of optical data in the surface layers of the ocean. Visit the BOUSSOLE web site to learn more about this project.
 
   
POLVSM
 

Development of an instrument able to measure the polarized volume scattering functions of marine particles in coastal waters.
Project leader: Malik Chami

The scientific objectives are to (i) characterize the polarized properties of each marine particle type which are optically significant in coastal zones, namely phytoplankton and inorganic matter including minerals, (ii) analyze the influence of the particles on the polarization state of the incident light in the water body, and (iii) develop improved algorithms based on the polarized water leaving radiance for retrieving bio-optical parameters. To achieve the scientific objectives of this project, we propose to develop an instrument able to measure the polarized volume scattering function of the marine particulate matter.
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MALINA
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How changes in ice cover, permafrost and solar radiation impact on biodiversity and biogeochemical fluxes in the Arctic Ocean?
Project leader: Marcel Babin

This study will look at the response of marine carbon fluxes controlled by solar radiation (photosynthesis, photooxidation of organic matter, and bacterial activity) to climate variability, in the past, present and future. Visit the Malina website to learn more about this project.

 

Development of an atmospheric correction algorithm over the open ocean using the polarized and directional measurements of the PARASOL satellite sensor (CNES)
Project leader: Malik Chami

The observation of the ocean from space provides some information about the phytoplanktonic biomass (i.e., chlorophyll “a”). To estimate the chlorophyll “a” concentration from satellite sensor, the significant contribution of the atmosphere to the signal reaching the sensor should be removed. This step is referred to as the atmospheric correction procedure. The reliability of the geophysical products derived from satellite is directly related to the accuracy of the atmospheric correction algorithms. The objective of the ALGOPOL project is to develop a polarization-based atmospheric correction algorithm over open ocean waters. The algorithm will exploit the polarized reflectance measured at the top of atmosphere in the visible bands to improve the atmospheric parameters retrieval.
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OSIFIOST
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Simulation tool for optical underwater images formation in turbid medium
Project leader : Anne Gaelle Allais (Ifremer)
Project leader at LOV : Malik Chami

The objective of project OSIFIOST is to propose a complete study, from the study of phenomena which explain light propagation in the ocean, particularly scattering, in order to obtain a model for the image formation in the underwater environment. The study of image formation is a key step necessary to develop specific image processing methods; this has already been proved in the domain of radar imagery for example. Some of them will be investigated in the framework of the project. These studies will allow us to design and develop an effective simulation system for the formation of underwater optical images.

 
GOYA

Dynamics of the Yangtze river plume (China) based on MERIS, MODIS and GOCI ocean colour satellite data
Project leader: David Doxaran

The objective of the GOYA project is to study the dynamics of the Yangtze river plume (China) using ocean colour satellite data provided daily by MODIS, MERIS and the first geostationary ocean color imager (GOCI, kosc.kordi.re.kr/oceansatellite/coms-goci). The Yangtze is one of the major river of the world in terms of freshwater, suspended matter and organic carbon discharges to the ocean. However, the actual fluxes currently exported by the river to the ocean are poorly documented due to a lack of appropriate measurements. We develop and apply regional ocean colour algorithms to quantify the concentrations of terrestrial substances in the river plume, re-estimate the fluxes of suspended solids and particulate organic carbon then highlight the advantages of geostationary observations.
   
 
PROVPANACHE
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Use of physical and bio-optical measurements onboard autonomous profiling floats to study the dynamics of river plumes
Project leader: David Doxaran

Physical and bio-optical measurements carried out onboard autonomous profiling floats are used to study the dynamics of river plumes. The objective is to complement satellite observations limited to surface waters and get information within the water column (thickness of river plumes, nepheloid layers, settling of particles, resuspension phenomena). It is expected to retrieve information on the three-dimensional dynamics of terrestrial substances (such as suspended particles and coloured dissolved organic matter) combining satellite and field autonomous observations. The selected study areas are the Beaufort Sea (Arctic Ocean), Gulf of Lion (Med. Sea) and East China Sea respectively influenced by the plumes of the Mackenzie, Rhône and Yangtze rivers.

   
BELCOLOUR-2
 

Optical remote sensing of coastal waters
Project leader : Kevin Ruddick (MUMM, Belgium)
Project leader at LOV : David Doxaran

The objective of the BELCOLOUR-2 project is to improve the quality of existing optical remote sensing products for marine, coastal and inland waters based on new knowledge and to develop innovative products. Specific objectives are to: (i) Improve the quality and the quality control of existing earth observation products for total suspended matter, chlorophyll a and diffuse attenuation; (ii) Improve and validate algorithms for atmospheric correction, particularly aspects concerning turbid waters, moderate sun glint and absorbing aerosols; (iii) Develop new algorithms for phytoplankton-related parameters including phytoplankton taxonomic groups and determine their range of applicability. Website
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PABO

Plateformes Autonomes et Biogéochimie Océanique
Project leader : Hervé Claustre

A project supported by ANR, whose general objective is to understand oceanic biogeochemistry at scales of observation, up to present, rarely if at all studied. This goal will be achieved by using novel autonomous observational platforms (such as gliders) equipped with miniaturized sensors used to realize innovative observations in oceanic biogeochemistry.
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PABIM

Plateformes Autonomes en Biogéochimie : Instrumentations et Mesures
Project leader : Fabrizio D'Ortenzio

PABIM is a project funded by the Group Mission Mercator Coriolis (GMMC) with a two fold objective: 1. To implement a set of automatic quality control tests for the oxygen and chlorophyll-a data collected with autonomous platforms. 2. To write a “White Book” on the present day status of the biogeochemical oceanic observations performed with autonomous platforms. PABIM is composed by eight French laboratories strongly involved in scientific activities related to the exploitation and the use of autonomous platforms for biogeochemical oceanic observations and is primarily devoted to the “moving” autonomous plateforms: gliders, profilng floats and animals. The rationale was to provide biogeochemical oceanographers with a “user's manual” on the autonomous platforms, with the declared aim of sharing the experiences of the authors towards an enlarged community.
PRONUTS

Flotteurs profileurs pour les sels nutritifs
Project leader: Fabrizio D'Ortenzio

PABIM is a project funded by the Group Mission Mercator Coriolis (GMMC) and by the PACA region. Main objective of PRONUTS is the development of a new type of profiling float able to measure the nitrate concentration in the water column. Two prototypes are currently under construction, equipped with the two commercially available nitrates UV based sensor (Satlantic Inc.): the ISUS and the SUNA. The two PRONUTS floats will be deployed in the Ligurian Sea (Mediterranean Sea) in the framework of the Mediterranean Ocean Observing System on Environment (MOOSE) activity. The PRONUTS team is composed by scientists from several French laboratories (LOV, IFREMER-TSI, Station Roscoff, LMGEM).
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Biopatterns

Plateformes Autonomes en Biogéochimie : Instrumentations et Mesures
Project leader : Fabrizio D'Ortenzio
Co-PI : Julia Uitz

The main objective of Biopatterns project (funded by LEFE CYBER) is to develop innovative approaches to better characterize phytoplankton spatio-temporal variability by the combined use of satellite remote sensing and biogeochemical profiling floats. Biopatterns is presently developing the biogeochemical component of Argo-France, and annual meeting are organized to share know-how and to develop synergies (see minutes of the last meeting held in Villefranche, Juin 2010, http://www.obs-vlfr.fr/OAO/doc/CR_Argo_France_Biogeochimie.pdf). Participation of scientists and technicians initially not involved in Biopatterns is strongly encouraged.
ProVal

Conception of an autonomous Profiling float for validation of ocean color satellite products
Project leader: Edouard Leymarie

This new project funded by the CNES is a synergy between two major know-how of the OMT team: the validation of ocean color products and the development of new applications for profiling floats. The objective is to build a float optimized for high quality radiometric measurements. This will be done through the minimization of sensor's self-shading, the study of sensor's natural ageing and the optimization of float's missions.
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BIOCAREX

Daily variability of optics and biogeochemestry in the opean ocean
Project leader: David Antoine

BIOCAREX exploits optical and biogeochemical observations made over 8 years at high frequency at the BOUSSOLE site in the northwestern Mediterranean (Ligurian Sea), and complements them with new parameters, in order to study in particular the variability of optical properties at the diurnal scale. This diurnal variability is relatively little studied, although it is a key driver of physics of the upper oceanic layers and of the biological activity that develops in these upper lit layers. It is also a main cause of the "noise" observed in the bio-optical relationships derived from data collected in the global ocean. Observations made at high spectral resolution will also be used to study changes in bio-optical regimes and their relationship with the composition of the microbial ecosystem.
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FLUXSAT

Estimation of solid fluxes at the Rhône River mouth
Project leader : David Doxaran

The main objective of the FLUXSAT project sera is to monitor the concentrations of suspended particulate matter (SPM) and particulate Organic Carbon (POC) at the mouth of the Rhône River (Gulf of Lion, Mediterranean Sea) using (i) field optical measurements continuously recorded by the autonomous MESURHO fixed buoy and (ii) high spatial resolution ocean colour satellite data recorded by the MERIS sensor. Taking into account seasonal to pluri-annual cycles of high and low river discharge, specific objectives are to the turbidity sensor onboard the MESURHO buoy and optimize a regional ocean colour algorithm. Results will provide a new assessment of uncertainties associated to the estimation of solid fluxes at river mouths.
OSS2015

Development of new and innovative marine biogeochemistry products in the ocean
Project leader: David Antoine

The OSS2015 project aims to carry out R&D activities for the development of new and innovative marine biogeochemistry products and services not currently available through MyOcean, the precursor service of theoperational forecast and analysis component of the European Marine Core Service (MCS). The OSS2015 products and services will be derived from a combination of satellite and in-situ data as well as biological and bio-optical models. Uptake and usage of these new capabilities will be promoted among a wide range of users in the scientific, institutional and private sectors. Web page: http://www.oss2015.eu
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MCGS

Project Marine Collaborative Ground Segment
Project leader at LOV: Malik Chami

The project MCGS aims at developing a data processing center of satellite observations of the ocean. Such a center will provide to users new geophysical products in various topics : (i) ocean color, (ii) ocean topography, (iii) wind/waves and oceanic currents. Different commercial services will be developed with regard to applications such as aquaculture, maritime security, operational monitoring of coastal zones. The project is funded by french ministry of industry and three regions : region Provence Alpes Côte d’Azur, region Midi Pyrénées and region Bretagne. In this project, the contribution of the partner Université Pierre et Marie Curie (LOV) will be focused on the analysis of ocean color remote sensing products.
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SEASWIR

Optical properties of turbid waters in the SWIR
Project leader at LOV: David Doxaran

The main objectives of the project are: (1) Determine the variability of marine reflectance in the Short Wave Infrared as function of Total Suspended Matter (TSM) concentration/turbidity for a range of study areas. (2) Analyze the effects of misapplication in extremely turbid waters of the SWIR black pixel assumption in atmospheric correction algorithms and propose a refinement of the SWIR black pixel method. (3) Provide information for the design and/or exploitation of SWIR bands on the next generation of ocean colour sensors (OLCI, SGLI, SABIAMAR, etc.).
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Recent research projects
 
   
HABWATCH
 

Conference on real time coastal observing systems for ecosystem dynamics and harmful algal blooms
Local organizer :
Marcel Babin

An international workshop/conference on new techniques for in situ optical observations took place in Villefranche-sur-Mer in 2003. Tutorials and lectures are available on their website.
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