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Analysis of decadal changes in the global ocean
phytoplankton through the synergistic use of satellite data and of 1-dimensional and 3-dimensional model
Project leader:
David Antoine
A project supported by ANR, with the aim of interpreting the decadal changes of the World ocean phytoplankton biomass, as observed in satellite ocean color records (see this reference for instance).
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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. |
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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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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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Biogeochemistry
and Optics South Pacific Experiment
Project leader: Hervé Claustre
The main focus of BIOSOPE
was the study the coupling of elements (C, N, P,
Si, Fe) in the subtropical gyre in the South Pacific. Visit
the BIOSOPE
website to learn more about this
mission.
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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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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. |
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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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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. |
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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. |
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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. |
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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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