Consulta: subjectFacets:"Suspended matter"
Registros recuperados: 12
Data/hora: 07/06/2024 02:31:33

Влияние крупномасштабных атмосферных процессов на формирование гидрофизических и гидробиологических полей в северо-западной части Черного моря в зимний период.
Provedor de dados: 13
Autores: Воскресенская, Е. Н.; Кукушкин, А. С.; Бурлакова, З. П.; Еремеева, Л. В.
Совместный анализ глобальных и региональных гидрометеорологических характеристик, гидрофизических и гидробиологических полей северо-западной части Черного моря в зимний период показал, что глобальные процессы в системе океан-атмосфера ответственны за особенности их межгодовой изменчивости. Аномалии речных стоков  в определенные фазы Североатлантического и Южного колебаний влияют на условия трансформации речных вод и продуцирования фитопланктона, что приводит к изменению содержания взвешенного вещества и прозрачности вод в зоне смешения речных и морских вод.
Tipo: Journal Contribution
Palavras-chave: Североатлантическое и Южное колебания; Гидрометеорологические условия; Сток рек; Прозрачность; Взвешенное вещество; Фитопланктон; North Atlantic and Southern Oscillations; Hydrometeorological characteristics; River run off; Transparency; Suspended matter; Phytoplankton Phytoplankton Transparency Phytoplankton http://aims.fao.org/aos/agrovoc/c_13344.
Ano: 2004
URL: http://repository.ibss.org.ua/dspace/handle/99011/93

Estimating turbidity and total suspended matter in the Adour River plume (South Bay of Biscay) using MODIS 250-m imagery
Provedor de dados: 5
Autores: Petus, Caroline; Chust, Guillem; Gohin, Francis; Doxaran, David; Froidefond, Jean-marie; Sagarminaga, Yolanda.
The Basque coastal waters (South Bay of Biscay) are directly influenced by the Adour River freshwater plume. The Adour outflow leads to important variations of suspended matter concentrations and turbidity, which in turn may affect biological productivity and water quality. This study aims at both developing specific algorithms and testing the efficiency of atmospherically corrected MODIS-Aqua 250-m surface reflectance product (MYD09) to map total suspended matter concentrations and turbidity within the Adour coastal region. First, regional empirical algorithms based on in-situ data were tested to retrieve the concentration of total suspended matter and turbidity from the remote sensing reflectance. Then, the respective sensitivity of MODIS surface...
Tipo: Text
Palavras-chave: Adour River plume; Turbidity; Suspended matter; Satellite sensing; MODIS; Remote sensing reflectance.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00003/11383/8042.pdf

Sources et caractéristiques des composés phénoliques dans l’estuaire de la Seine
Provedor de dados: 5
Autores: Motamed, B; Texier, H.
Within the framework of the multi-disciplinary program Seine Aval, phenolic compounds obtained by CuO oxidation have been studied since 1995. Quantitative analyses have shown a terrestrial contribution in flood, characterized by compounds of the group P (polyols + phenol), S (syringic) and H (hydroxybenzoic). During the low water period, phenolic compounds allow a clear distinction between fluvial and estuarine suspended material. Fluvial run-off contained Syringic, Hydroxybenzoic and Vanillic phenols. In contrast, upstream penetrating marine and estuarine waters are characterized by cinnamic phenols originating from estuarine herbus. In the turbidity maximum zone, aerobic degradation of lignin material increases the (vanillic acid/vanillin) ratio.
Tipo: Text
Palavras-chave: Composés phénoliques; HPLC; Matière en suspension; Seine; Phenolic compounds; HPLC; Suspended matter; Seine.
Ano: 2000
URL: http://archimer.ifremer.fr/doc/00325/43570/44051.pdf

In situ video and diffraction analysis of marine particles
Provedor de dados: 5
Autores: Lunven, Michel; Gentien, Patrick; Kononen, K; Le Gall, Erwan; Danielou, Marie-madeleine.
A design for a new underwater video-system to detect and observe suspended particles is presented. Particles are collected and isolated in a rectangular box where they are highly illuminated by a white light plane. The total field of view is determined. The camera, equipped with a remote controlled zoom, can resolve particles sizes ranging from 25 mum to several millimetres. Real-time image analyses are therefore performed. Particle counts and size spectra are calculated and displayed. Total light intensity scattered by the illuminated particles is closely related to the back-scattering values determined by an optical back-scatter sensor. A particle size analyser using diffraction analysis is associated to this video-system on a custom profiler....
Tipo: Text
Palavras-chave: Image analysis; Fine scale distribution; Flocculation; Suspended matter; In situ measurement.
Ano: 2003
URL: https://archimer.ifremer.fr/doc/2003/publication-504.pdf

The relationship between Suspended Particulate Matter and Turbidity at a mooring station in a coastal environment: consequences for satellite-derived products
Provedor de dados: 5
Autores: Jafar-sidik, Madihah; Gohin, Francis; Bowers, David; Howarth, John; Hull, Tom.
From a data set of observations of Suspended Particulate Matter (SPM) concentration, Turbidity in Formazin Turbity Unit (FTU) and fluorescence-derived chlorophyll-a at a mooring station in Liverpool Bay, in the Irish Sea, we investigate the seasonal variation of the SPM:Turbidity ratio. This ratio changes from a value of around 1 in winter (minimum in January–February) to 2 in summer (maximum in May–June). This seasonal change can be understood in terms of the cycle of turbulence and of the phytoplankton population that affects the nature, shape and size of the particles responsible for the Turbidity. The data suggest a direct effect of phytoplankton on the SPM:Turbidity ratio during the spring bloom occurring in April and May and a delayed effect, likely...
Tipo: Text
Palavras-chave: Turbidity; Suspended matter; MODIS; Irish Sea.
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00383/49473/49960.pdf

Surface suspended matter off the Rhone river mouth from visible satellite imagery
Provedor de dados: 5
Autores: Forget, P; Ouillon, S.
The quantification of surface Total Suspended Matter (TSM) off the Rhone river mouth is investigated using SPOT-XS and Landsat-TM images collected in November 1994. The method of satellite data calibration from in situ measurements is discussed. It is based on TSM concentration measurements through filtration of surface water samples and on radiometric data collected with a 256-channel spectroradiometer in the range 400-1100 nm. Empirical relationships between reflectance and TSM concentration are established by linear regression analysis of the data. These relationships are then applied to the image data corrected from atmospheric and surface effects. A good agreement, within a factor of less than two, was found on derived TSM concentration values as...
Tipo: Text
Palavras-chave: Réflectance; Matière en suspension; Télédétection; Panache fluvial; Rhône; Reflectance; Suspended matter; Remote sensing; River plume; Rhone river.
Ano: 1998
URL: http://archimer.ifremer.fr/doc/00325/43637/43228.pdf

The Advantages of Landsat 8-OLI-Derived Suspended Particulate Matter Maps for Monitoring the Subtidal Extension of Amazonian Coastal Mud Banks (French Guiana)
Provedor de dados: 5
Autores: Zorrilla, Noelia Abascal; Vantrepotte, Vincent; Gensac, Erwan; Huybrechts, Nicolas; Gardel, Antoine.
The coast of French Guiana is characterised by the northwestward migration of large mud banks alongshore and by high concentrations of suspended particulate matter (SPM) resulting from the strong influence of the Amazon River outflow. Surface OLI SPM concentration, linked to the footprint of the subtidal part of mud banks due to resuspension and migration processes, was used to develop a method to estimate the location of this footprint. A comparison of the results from this method with those obtained by locating the limit of the wave damping, which characterises muddy coasts, revealed good performance of the method based on recurring SPM values. The migration rates of the mud banks in French Guiana were calculated according to the delimitation of their...
Tipo: Text
Palavras-chave: Suspended matter; Mud banks; Ocean colour; Landsat 8; French Guiana.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00638/74965/75941.pdf

Ferrihydrite precipitation in groundwater-fed river systems (Nete and Demer river basins, Belgium): Insights from a combined Fe-Zn-Sr-Nd-Pb-isotope study
Provedor de dados: 5
Autores: Dekov, V.m.; Vanlierde, E.; Billstrom, K.; Garbe-schoenberg, C. -d.; Weiss, D. J.; Gatto Rotondo, G.; Van Meel, K.; Kuzmann, E.; Fortin, D.; Darchuk, L.; Van Grieken, R.
Two groundwater-fed river systems (Nete and Demer, Belgium) carry red suspended material that settles on the river bed forming red sediments. The local aquifer that feeds these river systems is a glauconite-rich sand, which provides most of the dissolved Fe to the rivers. The solid component of these systems, i.e., the red suspended material and sediments, has a simple mineralogy (predominantly ferrihydrite), but shows a complex geochemistry pointing out the different processes contributing to the river chemistry: (1) the red sediments have higher transition metal (excluding Cu) and detrital element (e.g., Si, Al, K, Rb, etc.) concentrations than the red suspended matter because of their longer residence time in the river and higher contribution of the...
Tipo: Text
Palavras-chave: Ferrihydrite; Fe-Zn-Sr-Nd-Pb-isotopes; Rivers; Sediments; Suspended matter.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00203/31404/29789.pdf

Particulate matter in Takapoto lagoon waters: potential food for cultivated pearl oysters
Provedor de dados: 5
Autores: Buestel, Dominique; Pouvreau, Stephane.
Results of research concerning the food of the pearl oyster Pinctada mai margaritifera are presented, by taking Takapoto atoll (Tuamotu archipelago, French Polynesia) as a study site. Monthly sampling of several parameters representative of bivalve environment and food (water temperature, salinity, mineral and organic matter, proteins, lipids and carbohydrates, chlorophyll a and phaeopigments) confirm and increase knowledge of the Takapoto lagoon hydrobiology. The variability of these parameters was analysed. Takapoto lagoon showed a remarkable spatial stability. Temporal variations showed a low seasonal trend. Local meteorology (wind, precipitation) had an influence on short-term variability (especially for mineral matter). Night and day rhythm also...
Tipo: Text
Palavras-chave: Pinctada margaritifera; Matière en suspension; Capacité trophique; Huı̂tre perlière; Atoll; Pinctada margaritifera; Suspended matter; Carrying capacity; Pearl oyster; Atoll.
Ano: 2000
URL: http://archimer.ifremer.fr/doc/00000/10529/7078.pdf

Optical algorithms at satellite wavelengths for Total Suspended Matter in tropical coastal waters
Provedor de dados: 5
Autores: Ouillon, Sylvain; Douillet, Pascal; Petrenko, Anne; Neveux, Jacques; Dupouy, Cecile; Froidefond, Jean-marie; Andrefouet, Serge; Munoz-caravaca, Alain.
Is it possible to derive accurately Total Suspended Matter concentration or its proxy, turbidity, from remote sensing data in tropical coastal lagoon waters? To investigate this question, hyperspectral remote sensing reflectance, turbidity and chlorophyll pigment concentration were measured in three coral reef lagoons. The three sites enabled us to get data over very diverse environments: oligotrophic and sediment-poor waters in the southwest lagoon of New Caledonia, eutrophic waters in the Cienfuegos Bay (Cuba), and sediment-rich waters in the Laucala Bay (Fiji). In this paper, optical algorithms for turbidity are presented per site based on 113 stations in New Caledonia, 24 stations in Cuba and 56 stations in Fiji. Empirical algorithms are tested at...
Tipo: Text
Palavras-chave: Ocean color; Remote sensing; Sediment transport; Suspended matter; Turbidity; New Caledonia; Cuba; Fiji.
Ano: 2008
URL: https://archimer.ifremer.fr/doc/00203/31417/29808.pdf

An automated method for the assessment of mercury adsorption rates on particulate suspended matter
Provedor de dados: 27
Autores: Baeyens, W.F.J.; Decadt, G.; Dehairs, F.A.; Goeyens, L.
A continuous filtration system connected to a mercury auto-analyzer has been constructed for obtaining mercury adsorption rates on particulate suspended matter. The capabilities of this device have been demonstrated by carrying out a series of experiments under controlled physicochemical parameter conditions on samples of the Scheldt estuary. Duplicate measurements showed coefficients of variation ranging from 1 to 6 %. Depending on the physico-chemical conditions, the initial adsorption rate per unit of dissolved mercury concentration varied between 1.2 and 8.1 x 10&lt;sup&gt;-2&lt;/sup&gt; mn&lt;sup&gt;-1&lt;/sup&gt;.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Adsorption; Mercury; Methodology; Particulates; Suspended matter.
Ano: 1982
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3413

Suspended matter and nutrient gradients of a small-scale river plume in Sepetiba Bay, SE-Brazil
Provedor de dados: 52
Autores: Rodrigues,Raphael Paiva; Knoppers,Bastiaan Adriaan; Souza,Weber Friederichs Landim de; Santos,Elisamara Sabadini.
Coastal river plumes represent one of the final stages of material transport across the land-sea interface. Most studies, however have focused on the behavior of medium to large sized river plumes of coastal-shelf waters, whereas small sized river plumes acting within estuaries have been neglected. This study addressed the behavior of suspended particulate matter (SPM), dissolved inorganic nutrients (DIN, DIP and DSi) and Chlorophyll a (Chl. a) of a small sized river plume derived from the closely lain São Francisco and Guandú river channels, set in the Sepetiba Bay estuary, SE-Brazil. Two surface water sampling campaigns were conducted, one in January 2003 (humid summer conditions) and the other in June 2003 (dry winter conditions). On both occasions, the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Suspended matter; Nutrients; Estuarine gradients; River plume; Sepetiba Bay; SE-Brazil.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132009000200030