Consulta: subjectFacets:"Suspended particulate matter"
Registros recuperados: 39
Data/hora: 15/06/2024 10:21:43

Etude du comportement geochimique du fer dans l'estuaire de la Seine
Provedor de dados: 5
Autores: Guegueniat, P; Boust, D; Gandon, R; Hemon, G; Phillipot, J; Sanchez, J; Marin, P; Pieri, J.
This paper reports the study of iron geochemical behavior by the measurement of total iron, iron associated with mineral coat, and ratio FEII/FEIII. The results of total iron are exploited by normalisation with regard to aluminium and scandium.
Tipo: Text
Palavras-chave: River discharge; Sediments; Suspended particulate matter; Ion association; Iron; Geochemical cycle.
Ano: 1985
URL: http://archimer.ifremer.fr/doc/1985/acte-1301.pdf

Mineral and organic soluble forms of zinc, iron and copper: Distribution in the Seine Estuary.
Provedor de dados: 5
Autores: Gandon, R; Guegueniat, P; Fischer, J; Wartel, M.
One characteristic of the Seine Estuary system is the process of sediment resuspension by the specific hydrodynamics of this environment. It's the main factor of trace metals transport. Autotrophic activities also have an effect on the estuary, by pH variation. The behavior of soluble and organic copper, iron, have been studied in relation to salinity in and out of the estuary. The results are compared with those of other estuaries.
Tipo: Text
Palavras-chave: Hydrodynamics; Physicochemical properties; Water properties; Dissolved organic matter; Biogeochemical cycle; Resuspension; Metals; Suspended particulate matter.
Ano: 1985
URL: http://archimer.ifremer.fr/doc/1985/acte-1300.pdf

Suspended sediments in a macrotidal estuary: comparison and use of different sensors
Provedor de dados: 5
Autores: Lunven, Michel; Gentien, Patrick.
Measurements made using an in situ particle-sizer (PSA) were compared to those of an optical backscatter sensor (OBS) in a macrotidal estuary. Both estimate the total volume of particles. After comparison with dry weight of suspended matter sampled in the study area, the different measurements were converted into dry weight. In three different kinetic energy regimes, times series were coherent for most of the observations. Discrepancies of suspended sediment concentrations estimated by both sensors appeared under specific hydrodynamic conditions: they were related to occurrences of definite particle populations. Overestimations and underestimations of measurements by the instruments depend on the optical principles of the sensors (backscatter and...
Tipo: Text
Palavras-chave: Particle size; Suspended particulate matter; Aggregates; Taille de particule; Matières en suspension; Agrégats.
Ano: 2000
URL: http://archimer.ifremer.fr/doc/2000/publication-521.pdf

Dynamique des matières en suspensions minérales des eaux de surface de la Manche observée par satellite et modélisée numériquement.
Provedor de dados: 5
Autores: Rivier, Aurelie.
Study of mineral suspended particulate matter (SPM) is essential to understand ecosystem dynamics. SPM influences light penetration which is closely related to primary production and carries pollutants and nutrients within the water masses. This work aims to study near-surface mineral SPM dynamics in the English Channel using two complementary methods: remote-sensing by satellites and numerical modelling. Firstly, MODIS and MERIS satellite images processed by the IFREMER semi-analytical algorithm and describing non-algal SPM, are analysed to build three statistical models which are able to estimate near-surface SPM using simple variables, e.g., tidal coefficient, significant wave height and mean chlorophyll-a concentration. Secondly, the three-dimensional...
Tipo: Text
Palavras-chave: Matière en suspension; Télédétection; Satellite; Modélisation; Manche; Sédiments; Turbidité; Marée; Houle; Suspended particulate matter; Satellite; Remote-sensing; Modelling; English Channel; Sediments; Turbidity; Tide; Wave.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00157/26783/24884.pdf

Constraining the origin of recently deposited particles using natural radionuclides 7 Be and 234 Th ex in deltaic sediments
Provedor de dados: 5
Autores: Wu, Junwen; Rabouille, Christophe; Charmasson, Sabine; Reyss, Jean Louis; Cagnat, Xavier.
7Be and 234Thex activities were determined in sediment cores off the Rhône River mouth (Gulf of Lions), in order to trace the initial transport and deposition of riverine suspended particulate matter (SPM) and evaluate the impact of flood events through 7 cruises carried out between 2007 and 2008. Consistently high 7Be and 234Thex inventories of 2000–3000 mBq cm−2 and 3000–5000 mBq cm−2, respectively, were observed within a ~5 km radius off the Rhône River mouth. Their spatial distributions showed a gradual decrease with increasing distance from the Rhône River mouth, and the decrease in 7Be was more pronounced than that of 234Thex, indicating that recent riverine SPM is rapidly deposited in the area located near the river mouth. This area is also...
Tipo: Text
Palavras-chave: Be-7; Th-234; Suspended particulate matter; Rhone River; 2008 flood; Gulf of Lions.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00445/55628/73535.pdf

Coccolith-derived turbidity and hydrological conditions in May in the Bay of Biscay
Provedor de dados: 5
Autores: Perrot, Laurie; Gohin, Francis; Ruiz-pino, Diana; Lampert, Luis; Huret, Martin; Dessier, Aurelie; Malestroit, Pascale; Dupuy, Christine; Bourriau, Paul.
Coccolithophore blooms occur regularly from April to June in the Bay of Biscay where they have been observed for many years from ocean-colour imagery thanks to the ability of their calcite plates to scatter light. They are easily depicted on interpolated images of non-algal Suspended Particulate Matter (SPM) derived from satellite reflectance data in May, at the time of the PELGAS (PELagique GAScogne) annual surveys. Over the springs 2012 to 2015, the PELGAS surveys provided in-situ data on the turbidity throughout the water column and on the hydrological environment prevailing during the blooms in the vicinity of the continental shelf break. The satellite-derived SPM in the area of coccolithophore blooms was closely related to measured turbidity in the...
Tipo: Text
Palavras-chave: Bay of Biscay; Ocean colour; Suspended particulate matter; Turbidity; Coccoliths; Stratification.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00416/52790/53689.pdf

Investigating Rhône River plume (Gulf of Lions, France) dynamics using metrics analysis from the MERIS 300m Ocean Color archive (2002 − 2012)
Provedor de dados: 5
Autores: Gangloff, Aurelien; Verney, Romaric; Doxaran, David; Ody, Anouck; Estournel, Claude.
In coastal environments, river plumes are major transport mechanisms for particulate matter, nutriments and pollutants. Ocean colour satellite imagery is a valuable tool to explore river turbid plume characteristics, providing observations at high temporal and spatial resolutions of suspended particulate matter (SPM) concentration over a long time period, covering a wide range of hydro-meteorological conditions. We propose here to use the MERIS-FR (300 m) Ocean Colour archive (2002–2012) in order to investigate Rhône River turbid plume patterns generated by the two main forcings acting on the north-eastern part of the Gulf of Lions (France): wind and river freshwater discharge. Results are exposed considering plume metrics (area of extension,...
Tipo: Text
Palavras-chave: River plume metrics; Sediment dynamics; MERIS; Ocean color data; Suspended particulate matter; Gulf of Lions.
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00391/50258/50885.pdf

Etude au microscope electronique a balayage des relations entre bacteries et matieres en suspension en milieu marin
Provedor de dados: 5
Autores: Cormier, M; Bassoulet, P; Pommepuy, Monique.
Near outfall areas numerous bacteria appear associated to colloidal organic matter present in littoral sea water. Arrangements into colonies are shown. Surface structures are observed which allow bacteria's attachment each to other and to organic matter.
Tipo: Text
Palavras-chave: Bacteria; Outfalls; Electron microscopy; Flocculation; Colloids; Adhesion; Suspended particulate matter.
Ano: 1984
URL: http://archimer.ifremer.fr/doc/1984/acte-966.pdf

Dynamique des suspensions et des depots: Synthese des discussions
Provedor de dados: 5
Autores: Larsonneur, C.
During the debate, the observations have dealt with balance-sheets, swell influence, sediment movements, and sedimentation flow deducted from suspensions studies. General remarks have been formulated, and a distinction of main fluvial mouths in the French littoral have been suggested.
Tipo: Text
Palavras-chave: Drowned valleys; Deltas; Estuaries; Coastal zone; Particle motion; Suspended particulate matter; Sediment dynamics.
Ano: 1985
URL: http://archimer.ifremer.fr/doc/1985/acte-1287.pdf

Development of a Semi-Analytical Algorithm for the Retrieval of Suspended Particulate Matter from Remote Sensing over Clear to Very Turbid Waters
Provedor de dados: 5
Autores: Han, Bing; Loisel, Hubert; Vantrepotte, Vincent; Meriaux, Xavier; Bryere, Philippe; Ouillon, Sylvain; Dessailly, David; Xing, Qianguo; Zhu, Jianhua.
Remote sensing of suspended particulate matter, SPM, from space has long been used to assess its spatio-temporal variability in various coastal areas. The associated algorithms were generally site specific or developed over a relatively narrow range of concentration, which make them inappropriate for global applications (or at least over broad SPM range). In the frame of the GlobCoast project, a large in situ data set of SPM and remote sensing reflectance, R-rs(lambda), has been built gathering together measurements from various coastal areas around Europe, French Guiana, North Canada, Vietnam, and China. This data set covers various contrasting coastal environments diversely affected by different biogeochemical and physical processes such as sediment...
Tipo: Text
Palavras-chave: Specific backscattering coefficient; Empirical algorithm; Semi-analytic algorithm; Coastal waters; Suspended particulate matter; Ocean color.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00589/70062/68010.pdf

Trawling-induced resuspension and dispersal of muddy sediments and dissolved elements in the Gulf of Lion (NW Mediterranean)
Provedor de dados: 5
Autores: De Madron, X; Ferre, B; Le Corre, Gildas; Grenz, C; Conan, P; Pujo Pay, M; Buscail, R; Bodiot, O.
A dedicated trawling experiment was performed at three sites on the Gulf of Lion continental shelf, with the aim of assessing the resuspension of particulate and dissolved matter triggered by different types of trawls on muddy sediments. The different configurations were: (i) bottom trawl, with bobbin for ground rope (Rockhopper): (ii) bottom trawl, without bobbin (Medits); and (iii) pelagic trawl, towed at 1 and 10m above the seabed.   The plumes of resuspended sediment were measured using the acoustic backscattered intensity, from a towed ADCP. Concomitant profiles of particle size-distribution, light transmission and water samples were collected, outside and inside the plumes. The analysis of the data enabled derivation of the major physical and...
Tipo: Text
Palavras-chave: Northwestern Mediterranean Sea; Gulf of Lion; Suspended particulate matter; Sediment resuspension; Cohesive sediments; Bottom trawling; Coastal fisheries.
Ano: 2005
URL: http://archimer.ifremer.fr/doc/2005/publication-1355.pdf

Contamination of the Bay of Biscay by polycyclic aromatic hydrocarbons (PAHs) following the T/V "Erika" oil spill
Provedor de dados: 5
Autores: Tronczynski, Jacek; Munschy, Catherine; Moisan, Karine; Guiot, Nadege; Truquet, Isabelle; Olivier, Nathalie; Men, Sophie; Furaut, Audrey.
An investigation was carried out into the PAH chemical contamination resulting from the "Erika" tanker fuel spillage of December 1999 along the French coast of the Bay of Biscay. A qualitative and quantitative assessment was conducted of this contamination in water, suspended particulate matter, sediments, and in intertidal molluscs. The chemical composition of PAHs in pre-spill and post-spill samples was determined and used to distinguish the "Erika's" fuel as the source of PAHs in the coastal environment of the Bay of Biscay. Changes in concentrations of PAHs were also assessed. The GC-MS analysis made it possible to identify and quantify parent unsubstituted PAHs, alkyl-substituted PAHs (C-PAH) and sulfur heterocycle unsubstituted and alkyl substituted...
Tipo: Text
Palavras-chave: The "Erika" oil spill; North East Atlantic; Marine molluscs; Sediments; Suspended particulate matter; Water; Chemical contamination.
Ano: 2004
URL: http://archimer.ifremer.fr/doc/2004/publication-401.pdf

Microbial hydrogen production potential in shallow oceanic nepheloid layers.
Provedor de dados: 5
Autores: Schwarz, J; Loeblich, L; Schropp, S.
Seawater samples taken from shallow suspended particle maxima (20-57m) at or near the base of the surface mixed layer in various oceanic areas were tested for their potential to produce hydrogen (H sub(2)) gas. Results suggest that hydrogen can be bacterially produced through a fermentative process in microanaerobic niches within particulate matter. The organisms responsible for this process are ubiquitous within the temperate and tropical waters sampled. Enumeration of potential H sub(2)-producing bacteria using fluorescent antibody techniques yielded a maximum at the base of the surface mixed layer, the same depth where the greatest H sub(2) gas production potential was observed. Hydrogen-producing bacteria comprised up to 15% of the total bacterial...
Tipo: Text
Palavras-chave: Suspended particulate matter; Sea water; Gases; Biogeochemistry; Biogenic material; Hydrogen; Anaerobic bacteria; Nepheloid layer; Fermentation.
Ano: 1984
URL: http://archimer.ifremer.fr/doc/1984/acte-962.pdf

Distribution de 40 elements a l''etat de traces dans les suspensions de la Seine. Utilisation du lanthane pour etudier les processus sedimentaires dans l''estuaire et dans la baie
Provedor de dados: 5
Autores: Guegueniat, P; Boust, D; Hemon, G; Phillipot, J; Lagarde, G; Heitz, C.
This work has three objectives in view: (1) the establishment of spatial distribution of 40 trace elements in suspensions and sediments of the Seine estuary and bay; (2) the research of non-reactive geochemical tracers of fluvial deposits; and (3) the illustration of sediment dynamics influence on distribution of elements during the particulate period.
Tipo: Text
Palavras-chave: Sediment chemistry; River discharge; Geographical distribution; Estuarine dynamics; Sediment dynamics; Suspended particulate matter; Trace elements.
Ano: 1985
URL: http://archimer.ifremer.fr/doc/1985/acte-1297.pdf

Etude des transports de matieres en suspension en Manche par l''emploi de l'imagerie CZCS
Provedor de dados: 5
Autores: Thomas, Y.
The suspended matter distribution in Channel surface waters during 1981 have been obtained by the interpretation of radiometer recording (Coastal zone Color Scanner working on Nimbus 7 satellite). After imagery calibration and calculation of suspended matter concentration using algorithm from in situ measurements, the maps interpretation allows the study of: (1) resuspension of infratidal fluvial particles by swells and tides; (2) characterizing of intertidal zone given estuarine material by erosion; (3) determination of river plume limits with regard to Seine flow rate; (4) calculation and modeling of solid load; (5) estimation of suspended particles masses and volumes to strike the balance; (6) differentiation of hydrobiological behaviors in Western and...
Tipo: Text
Palavras-chave: Turbidity; Coastal zone; Estuarine front; River plumes; Zonal distribution; Estuarine dynamics; Radiometers; Remote sensing; Suspended particulate matter; Particle motion.
Ano: 1985
URL: http://archimer.ifremer.fr/doc/1985/acte-1280.pdf

Variation in the composition of carbohydrates in the Dona Paula Bay (west of India) during May/June 1998
Provedor de dados: 5
Autores: D'Souza, F; Bhosle, Nb.
Suspended particulate material was analysed for particulate carbohydrate concentration and composition and for the bulk parameters: suspended particulate matter, chlorophyll a, particulate organic carbon, particulate organic nitrogen and particulate proteins. Chlorophyll a concentrations increased from May 7 to 15 due to the development of a small scale bloom of diatom Navicula sp. and decreased for the remaining period after the premonsoon rain on 16 and 17 May. Concentrations of particulate organic carbon, organic nitrogen, carbohydrates and proteins increased with the increase in chlorophyll a concentration. Together particulate protein-carbon and carbohydrate-carbon accounted for 10 to 30% of the organic carbon. Glucose contributed 26 to 81% to the...
Tipo: Text
Palavras-chave: Hydrates de carbone; Côte de l’Inde; Nutriments; Matière particulaire en suspension; Carbohydrates; India coast; Nutrients; Suspended particulate matter.
Ano: 2001
URL: http://archimer.ifremer.fr/doc/00322/43351/42862.pdf

Pouvoir complexant des eaux de l'estuaire de la Seine
Provedor de dados: 5
Autores: Fischer, J; Wartel, M; Guegueniat, P; Gandon, R.
Copper has been studied, by the authors, owing to its ability to complex with various organic ligands of natural waters. Metals extraction and liberation can be explained, in part, by this complexing capacity.
Tipo: Text
Palavras-chave: Estuaries; Suspended particulate matter; Dissolved organic matter; Copper; River discharge; Ion association; Metals; Biogeochemical cycle; Water properties.
Ano: 1985
URL: http://archimer.ifremer.fr/doc/1985/acte-1298.pdf

Flux sédimentaire en estuaire de Seine : quantification et variabilité multi-échelle sur la base de mesure de turbidité (réseau SYNAPSES)
Provedor de dados: 5
Autores: Druine, Flavie.
The dynamics of Suspended Particulate Matter (SPM) in macrotidal estuaries is highly variable both spatially (from the fluvial compartment to the estuary mouth) and temporally (from the second to several years), but it is essential to understand and quantify the sedimentary dynamics of estuarine environments. With the development of high-frequency measurement networks around the world, the main objective of this study is to qualify the turbidity measurements acquired by a high-frequency measurement network (SYNAPSES network) located on the Seine estuary (i) in terms of monitoring the SPM dynamics from the fluvial compartment to the turbidity maximal zone (TMZ) and (ii) in terms of estimation of the SPM fluxes on different spatio-temporal scales of the...
Tipo: Text
Palavras-chave: Matière en suspension; Flux de matière en suspension; Réseau de mesures haute-fréquence; Capteurs optiques et acoustiques; Représentativité; Estuaire macrotidal; Estuaire de la Seine; Macrotidal estuary; Seine Estuary; Optical and acoustic sensors; Representativeness; High frequency measurement network; Suspended particulate matter; SPM fluxes.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00498/60966/64374.pdf

Particules en suspension dans la Baie de Seine: Concentration et sedimentation instantanee en periode d''etiage
Provedor de dados: 5
Autores: Brun, C; Benbrahim, M.
Granulometry, density estimation, massic charge, sedimentary flux of suspensions and time of suspended forms are the different parts of this report. The studies have taken place during low-water levels and don't take into consideration the effects of storms and floods.
Tipo: Text
Palavras-chave: Density; Granulometry; Low tide; Sedimentation; Particle concentration; Suspended particulate matter.
Ano: 1985
URL: http://archimer.ifremer.fr/doc/1985/acte-1279.pdf

Strategie d''etude des suspensions mise en oeuvre en Baie de Seine
Provedor de dados: 5
Autores: Lafite, R; Lamboy, M.
The results of research lead by this laboratory have struck upon the qualitative and textural diversity of suspended particulate matter. This diversity has followed the various techniques for sampling and the adjustment of a methodology which correlate, quantitative data analysis.
Tipo: Text
Palavras-chave: Estuarine front; River plumes; Estuaries; Marine environment; Zonal distribution; Mathematical analysis; Composition; Particle concentration; Turbidity; Granulometry; Methodology; Sampling; Particle distribution; Suspended particulate matter.
Ano: 1985
URL: http://archimer.ifremer.fr/doc/1985/acte-1276.pdf

The exceptional surface turbidity of the North-West European shelf seas during the stormy 2013-2014 winter: consequences for the initiation of the phytoplankton blooms?
Provedor de dados: 5
Autores: Gohin, Francis; Bryere, Philippe; Griffiths, Joshua.
A succession of storms during the winter 2013-2014 enhanced the resuspension of sediments in the surface waters of the North-West European shelf seas. The effects of waves on satellite-derived non-algal SPM (Suspended Particulate Matters) are discussed for the January 2008-March 2014 period. A simple statistical model relating locally SPM to tidal intensity and waves help us analyse the main characteristics of the winter 2013-2014. The exceptional run of storms observed in this stormy and rainy winter has resulted in the highest SPM concentration in the Celtic Sea and the Bay of Biscay ever observed by remote-sensing during the 1998-2014 period. Despite the lower clarity of the surface waters over a large part of the continental shelf during the first days...
Tipo: Text
Palavras-chave: Suspended particulate matter; Satellite ocean colour; Waves effects; Climate; Algal blooms; North-West European shelf seas.
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00252/36303/34832.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

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

Contribution de l''etude des suspensions a la comprehension des mecanismes hydrosedimentaires estuariens et littoraux en Manche centrale et orientale
Provedor de dados: 5
Autores: Dupont, J; Lafite, R; Lamboy, M.
Satellite imagery shows the turbid and thermal plume of the Seine River and littoral zone of Picardie and Haute-Normandie. The suspensions have been analysed in conformity with a strategy elaborated in 1985 by the authors. In this macrotidal coastal environment they have attempted to draw the dynamic specificities and the material characteristics.
Tipo: Text
Palavras-chave: Estuarine front; Harbours; Coastal zone; Estuaries; Marine environment; Composition; Particle concentration; Granulometry; Hydrodynamics; River plumes; Suspended particulate matter.
Ano: 1985
URL: http://archimer.ifremer.fr/doc/1985/acte-1277.pdf

A simple empirical band-ratio algorithm to assess suspended particulate matter from remote sensing over coastal and inland waters of Vietnam: application to the VNREDSat-1/NAOMI sensor
Provedor de dados: 5
Autores: Dinh Ngoc, Dat; Loisel, Hubert; Vantrepotte, Vincent; Chu Xuan, Huy; Nguyen Minh, Ngoc; Verpoorter, Charles; Meriaux, Xavier; Thi Minh, Hanh Pham; Le Thi, Huong; Le Vu Hong, Hai; Nguyen Van, Thao.
VNREDSat-1 is the first Vietnamese satellite enabling the survey of environmental parameters such as vegetation and water coverages, or surface water quality at medium spatial resolution (from 2.5 to 10 meters depending on the considered channel). The NAOMI sensor on board VNREDSat-1 has the required spectral bands to assess the suspended particulate matter concentration, SPM. Because recent studies have shown that the remote sensing reflectance, Rrs(ƒÜ), at the blue (450 ¡V 520 nm), green (530 ¡V 600 nm), and red (620 ¡V 690 nm) spectral bands can be assessed from NAOMI with a good accuracy, the present study is dedicated to the development and validation of an algorithm (hereafter referred to as V1SPM) to assess SPM from Rrs(ƒÜ) over inland and coastal...
Tipo: Text
Palavras-chave: VNREDSat-1/NAOMI; Landsat-8/OLI; Suspended particulate matter; Algorithm.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00648/76043/76979.pdf

Biogeochemical markers of organic matter along the Wight-Cherbourg transect (central English Channel)
Provedor de dados: 5
Autores: Ismaili, Mm; Serve, L; Gadel, F; Lafite, R; Texier, H.
Three cruises on the Wight-Cherbourg transect were undertaken during the FluxManche II Programme in order to study the origin, nature and behaviour of organic matter inputs to the waters of the English Channel. Suspended particulate material (SPM) collected from surface and deep waters at each station was analysed at elemental level for Particulate Organic Carbon and Particulate Organic Nitrogen (POC, PON), at molecular level for main classes of organic compounds using Pyrolysis-Gas Chromatography coupled with Mass Spectrometry (Py-GC-MS) and for phenolic compounds, particularly lignin-derived phenols, using High Performance Liquid Chromatography (HPLC). The SPM content increases from the French (south) to the English coast (north) with the lowest values...
Tipo: Text
Palavras-chave: Matière particulaire en suspension; Composés organiques; Marqueurs phénoliques; Biogéochimie; Manche; Suspended particulate matter; Organic compounds; Phenolic markers; Biogeochemistry; English Channel.
Ano: 1999
URL: http://archimer.ifremer.fr/doc/00325/43603/43922.pdf

Suspended particulate matter fluxes through the Straits of Dover, English Channel: observations and modelling
Provedor de dados: 5
Autores: Lafite, Robert; Shimwell, Susan; Grochowski, Nicolas; Dupont, Jacques; Nash, Linda; Salomon, Jean-claude; Cabioch, Louis; Collins, Michael; Gao, Shu.
Suspended Particulate Matter (SPM) concentrations at various levels within the water column, together with salinity and temperature, were measured using water samples collected from six stations across the Straits of Dover. The sampling programme covered a 16-month period, undertaken during 23 cruises. On the basis of the spatial variability in the concentrations, the water bodies are divided by several boundaries, controlled by tidal and wind conditions. Within the water column, SPM concentrations were higher near the sea bed than in the surface waters. Throughout the cross-section, maximum concentrations occurred adjacent to the coastlines. Temporal variability in the SPM concentration exists on daily and seasonal scales within the coastal waters (4.2 to...
Tipo: Text
Palavras-chave: English Channel; Straits; Transport mechanisms; Flux; Suspended particulate matter; Manche; Détroit; Mécanismes de transport; Flux; Matières en suspension.
Ano: 2000
URL: https://archimer.ifremer.fr/doc/2000/publication-527.pdf

Les polychlorobiphenyles ( PCB ) en Baie de Seine
Provedor de dados: 5
Autores: Abarnou, Alain.
PCB contamination and i ts relationship wi th suspended particulate matter (SPM) have been studied in water from the Seine estuary and the baie de Seine, in July 1985 and February 1986. PCB chromatograms are very similar and characterize a chronic contamination. PCB concentrations vary from 2 ng/l in the marine zone up to 210 ng/l in the estuary. SPM and PCB concentrations are weIl correlated. Highest PCB concentrations are measured in February due to higher SPM inputs mainly made of finer particles.
Tipo: Text
Palavras-chave: PCB; Seine; Fleuve; Estuaire; Baie; Matières en suspension; PCB; Seine; River; Estuary; Bay; Suspended particulate matter.
Ano: 1988
URL: http://archimer.ifremer.fr/doc/00138/24924/23020.pdf

Atmospheric Corrections and Multi-Conditional Algorithm for Multi-Sensor Remote Sensing of Suspended Particulate Matter in Low-to-High Turbidity Levels Coastal Waters
Provedor de dados: 5
Autores: Novoa, Stefani; Doxaran, David; Ody, Anouck; Vanhellemont, Quinten; Lafon, Virginie; Lubac, Bertrand; Gernez, Pierre.
The accurate measurement of suspended particulate matter (SPM) concentrations in coastal waters is of crucial importance for ecosystem studies, sediment transport monitoring, and assessment of anthropogenic impacts in the coastal ocean. Ocean color remote sensing is an efficient tool to monitor SPM spatio-temporal variability in coastal waters. However, near-shore satellite images are complex to correct for atmospheric effects due to the proximity of land and to the high level of reflectance caused by high SPM concentrations in the visible and near-infrared spectral regions. The water reflectance signal ((w)) tends to saturate at short visible wavelengths when the SPM concentration increases. Using a comprehensive dataset of high-resolution satellite...
Tipo: Text
Palavras-chave: Remote sensing; Suspended particulate matter; Coastal waters; River plumes; Multi-conditional algorithm.
Ano: 2017
URL: https://archimer.ifremer.fr/doc/00590/70197/68222.pdf

Uncertainties associated with in situ high-frequency long-term observations of suspended particulate matter concentration using optical and acoustic sensors
Provedor de dados: 5
Autores: Fettweis, Michael; Riethmüller, Rolf; Verney, Romaric; Becker, Marius; Backers, Joan; Baeye, Matthias; Chapalain, Marion; Claeys, Styn; Claus, Jan; Cox, Tom; Deloffre, Julien; Depreiter, Davy; Druine, Flavie; Flöser, Götz; Grünler, Steffen; Jourdin, Frédéric; Lafite, Robert; Nauw, Janine; Nechad, Bouchra; Röttgers, Rüdiger; Sottolichio, Aldo; Van Engeland, Tom; Vanhaverbeke, Wim; Vereecken, Hans.
Measurement of suspended particulate matter concentration (SPMC) spanning large time and geographical scales have become a matter of growing importance in recent decades. At many places worldwide, complex observation platforms have been installed to capture temporal and spatial variability over scales ranging from cm (turbulent regimes) to whole basins. Long-term in situ measurements of SPMC involve one or more optical and acoustical sensors and, as the ground truth reference, gravimetric measurements of filtered water samples. The estimation of SPMC from optical and acoustical proxies generally results from the combination of a number of independent calibration measurements, as well as regression or inverse models. Direct or indirect measurements of SPMC...
Tipo: Text
Palavras-chave: Suspended particulate matter; Measurement uncertainty; Regression; Optical and acoustical sensors.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00510/62132/66364.pdf

Mutagenicity and genotoxicity of suspended particulate matter in the Seine river estuary
Provedor de dados: 5
Autores: Hubert, Francoise; Moisan, Karine; Munschy, Catherine; Tronczynski, Jacek.
Highly mutagenic compounds such as some PAHs have been identified in surface waters and sediments of the Seine river estuary. Suspended particulate matter (SPM) represents a dynamic medium that may contribute to the exposure of aquatic organisms to toxic compounds in the water column of the estuary. In order to investigate major sources of mutagenic contaminants along the estuary, water samples were taken at 25 in downstream of the outlet of an industrial wastewater-treatment plant (WWTP). SPM samples were analyzed for their genotoxicity with two short-term tests, the Salmonella typhimurium mutagenicity assay (TA98 + S9 mix) and the comet assay in the human HepG2 cell line. Sampling sites receiving effluents from a chemical dye industry and WWTP showed the...
Tipo: Text
Palavras-chave: Ames test; Comet assay; Water pollution; Effluent; Suspended particulate matter; Seine estuary.
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00072/18323/16013.pdf

Capacité des moules dans la réduction des teneurs en nutriments et la charge bactérienne dans les effluents piscicoles
Provedor de dados: 20
Autores: Romdhane, M.S.; Chebil Ajjabi, L.; El Abed, O.
L’effluent des élevages de poissons renferme des concentrations plus élevées en nutriments dissous et en particules en suspension que celles présentes dans l’eau entrante. Cet état entraine par conséquent, des problèmes d’ordre environnementaux affectant les eaux côtières dues à l’eutrophisation et l’augmentation de la turbidité. Afin d’améliorer la qualité de l’effluent avant son déversement dans le milieu naturel, l’utilisation des bivalves comme filtre biologique est une alternative adéquate. Cette étude analyse la capacité de la moule Mytilus galloprovincialis de réduire les teneurs en sels nutritifs et la charge bactérienne dans les effluents de loups Dicentrarchus labrax en élevage. L’effluent issu des bassins de grossissement est pompé directement...
Tipo: Journal Contribution
Palavras-chave: Aquaculture effluents; Bacteria; Biofilters; Chlorophylls; Culture effects; Density; Effluents; Filtration; Fish; Mussel fisheries; Nitrogen; Nutrients (mineral); Phosphorus; Suspended particulate matter; Wastewater treatment; Water quality; Mytilus galloprovincialis; Wastewater treatment; Mussels; Nutrients; Http://aims.fao.org/aos/agrovoc/c_31155; Http://aims.fao.org/aos/agrovoc/c_25312; Http://aims.fao.org/aos/agrovoc/c_5010; Http://aims.fao.org/aos/agrovoc/c_5274.
Ano: 2008
URL: http://hdl.handle.net/1834/4154

Spatial distribution of suspended particulate matter in Mtwapa creek and Funzi Bay, Kenya
Provedor de dados: 20
Autores: Mavuti, K.M.; Mutua, A.K.; Daro, N.; Tack, M.
Surface water concentrations of inorganic nutrients and suspended particulate matter (SPM) components from Mtwapa and Shirazi creeks in Kenya were measured and compared. This was aimed at assessing the contribution of phytoplankton carbon, particulate organic carbon (POC) and detritus on the total SPM pool, and the influence of sewage discharge on these components of SPM. The results obtained were compared with those from Ramisi, an estuarine system. Using PCA and cluster analysis, three clear clusters of stations were obtained. The two creek systems (Mtwapa and Shirazi) were separated into two distinct clusters. The cluster comprising five stations in Mtwapa and four in Shirazi was characterised by high levels of POC: phytoplankton carbon ratio and to a...
Tipo: Journal Contribution
Palavras-chave: Suspended particulate matter; Particulate organic carbon; Detritus Surface water Suspended matter Phytoplankton Components Nutrients http://aims.fao.org/aos/agrovoc/c_5274.
Ano: 2004
URL: http://hdl.handle.net/1834/1088

Capacité des moules dans la réduction des teneurs en nutriments et la charge bactérienne dans les effluents piscicoles
Provedor de dados: 20
Autores: Chebil Ajjabi, L.; Romdhane, M.S.; El Abed, A.
L’effluent des élevages de poissons renferme des concentrations plus élevées en nutriments dissous et en particules en suspension que celles présentes dans l’eau entrante. Cet état entraine par conséquent, des problèmes d’ordre environnementaux affectant les eaux côtières dues à l’eutrophisation et l’augmentation de la turbidité. Afin d’améliorer la qualité de l’effluent avant son déversement dans le milieu naturel, l’utilisation des bivalves comme filtre biologique est une alternative adéquate. Cette étude analyse la capacité de la moule Mytilus galloprovincialis de réduire les teneurs en sels nutritifs et la charge bactérienne dans les effluents de loups Dicentrarchus labrax en élevage. L’effluent issu des bassins de grossissement est pompé directement...
Tipo: Journal Contribution
Palavras-chave: Aquaculture effluents; Bacteria; Biofilters; Chlorophylls; Chlorophylls; Culture effects; Density; Effluents; Filtration; Fish; Mussel culture; Nitrogen; Nutrients (mineral); Phosphorus; Suspended particulate matter; Wastewater recycling; Wastewater treatment; Water quality; Fish; Nitrogen; Phosphorus; Water quality; Mussels; Nutrients; Bacteria; Chlorophylls; Density; Effluents; Filtration; Wastewater treatment.
Ano: 2008
URL: http://hdl.handle.net/1834/3756

Modelling sand resuspension by waves over a rippled bed
Provedor de dados: 27
Autores: Trouw, K.; Williams, J.J.; Rose, C.P.
With a two-dimensional &lt;i&gt;Kappa-Epsilon&lt;/i&gt;-model and equations to describe sediment entrainment, diffusion, convection and settling, wave-induced flow velocities and sediment concentration fields over rippled beds have been calculated. Results from the simulations are compared with time-averaged vertical suspended sediment concentration profiles, C-profiles, measured in a large wave flume using the autonomous multi-sensor instrument STABLE. The simulations make it possible to examine in detail the mechanisms of sediment entrainment, vortex formation and advection. The resulting animations of model output allow a quasi-3-D visualization of sediment resuspension processes and aid quantification of the resulting vertical suspended sediment...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bed forms; Hydraulic models; Ocean floor; Resuspension; Sand; Sand ripples; Suspended particulate matter; Vertical profiles.
Ano: 2000
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=7390

Elemental concentrations and heavy metal pollution in sediments and suspended matter from the Belgian North Sea and the Scheldt estuary
Provedor de dados: 27
Autores: Van Alsenoy, V.; Bernard, P.; Van Grieken, R.
The elemental composition of sediment and suspended matter samples from the Belgian coastal and offshore regions of the Southern Bight of the North Sea and from the Scheldt estuary has been determined using X-ray fluorescence and atomic absorption spectrometry.Special attention was given to the heavy metals of the black and grey lists. The bulk sediment and the clay/silt fraction were analyzed. The average heavy metal contents in the fraction &lt;63 µm were comparable to the levels in the suspended matter. Different normalization techniques led to the identification of two different populations of sediments. Most of the sediments were enriched in Cd, Cr, Hg, Pb and Zn but no enrichment was found for Cu and Ni. Comparing these data with older data indicates...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Heavy metals; Pollution; Sediments; Suspended particulate matter.
Ano: 1993
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=2789

Classification of estuarine particles using automated electron microprobe analysis and multivariate techniques
Provedor de dados: 27
Autores: Bernard, P.C.; Van Grieken, R.E.
The suspended particulate matter from a series of stations in an estuary is automatically analyzed for 11 elements on a particle-by-particle basis by using electron microprobe X-ray microanalysis and an automatic image analysis system. The interpretation of the large acquired data set implies numerical multivariate analysis. The developed procedure consists of using cluster analysis on the particles of individual samples, followed by nearest centroid sorting over all samples from the study area. For the Ems estuary, the procedure provided 13 geochemically different particle types of which the relative abundance through the estuary could be followed and interpreted in terms of estuarine mixing processes. The presented methodology could be applied in other...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Estuarine chemistry; Multivariate analysis; Suspended particulate matter.
Ano: 1986
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3219

Electron microprobe analysis of suspended matter in the Angola Basin
Provedor de dados: 27
Autores: Bernard, P.; Eisma, D.; Van Grieken, R.
Electron microprobe analysis of suspended-matter samples collected at different water depths at ten stations in the Angola Basin indicated that at each station, from top to bottom, the elementary composition of the suspended matter was very similar and differed from the composition of the suspended matter at the adjacent stations. This indicates that the downward settling of the suspended matter is much faster than the horizontal transport and mixing by the currents. Assuming that the suspended matter settles in the form of flocs, or is scavenged by settling flocs, the suspended matter can indeed reach the bottom in a shorter period than needed for the currents to cover the distance between adjacent stations. Comparison with sediment trap data from the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biochemical composition; Ocean basins; Sediment traps; Sedimentation; Suspended particulate matter.
Ano: 1999
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3977

Hydrodynamic Aspects at Vitória Bay Mouth, ES
Provedor de dados: 42
Autores: GARONCE,FLÁVIA A.A.; QUARESMA,VALÉRIA S.
Understading the hydrodynamic behavior and suspended particulated matter (SPM) transport are of great importance in port regions such as Vitória Harbor, which is located at Vitória Bay, Vitória – ES, Brazil. Vitória Bay is an estuary that has not been systematically assessed through a temporal analysis in order to identify its hydrodynamics characteristics and SPM exchange. This study aims to investigate salt and suspended particulate matter flux at the estuarine mouth of Vitória Bay by understanding the temporal variation of salinity, temperature and tidal currents within the water column and at the channel crosssection. Results showed that the estuarine mouth tended to present partial stratification periods during neap tides and little stratification in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Estuary; Hydrodynamics; Suspended particulate matter; Vitória Bay.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652014000200555