Consulta: subjectFacets:"Bathymetry"
Registros recuperados: 60
Data/hora: 13/06/2024 10:01:01

Caracterización integral de las lagunas del estado de Hidalgo
Provedor de dados: 32
Autores: Montero Aguirre, Saúl.
Los cuerpos de agua son importantes para el almacenamiento y abastecimiento de  agua potable, riego, generar energía eléctrica, además de ser importantes para  disipar la fuerza de las grandes avenidas, estos cuerpos pueden ser utilizados como  criaderos de peces y áreas de recreación, de lo cual muchas comunidades obtienen  recursos adicionales para sobrevivir. A los ríos  descargan las aguas negras de las  comunidades que a su paso se encuentran, llevando grandes cantidades de  sedimentos y de contaminantes. Las aguas del Río Tulancingo  llegan a  la Laguna  de Metztitlan, la cual en tiempo de lluvias tiende a provocar inundaciones aguas  arriba. Este cuerpo de agua al igual que la mayoría de los cuerpos de agua que  existen en México, está perdiendo su...
Tipo: Tesis
Palavras-chave: Batimetría; Sedimentos; Cuerpos de agua; Cuenca; Morfología; Maestría; Hidrociencias; Bathymetry; Silts; Bodies of water; Basin; Morphology.
Ano: 2008
URL: http://hdl.handle.net/10521/1254

New insight into the formation and evolution of the East Reykjanes Ridge Current and Irminger Current
Provedor de dados: 5
Autores: Petit, Tillys; Mercier, Herle; Thierry, Virginie.
The Reykjanes Ridge strongly influences the circulation of the North Atlantic Subpolar Gyre as it flows to the Irminger Sea from the Iceland Basin. The circulation is composed of two main along‐ridge currents: the southwestward East Reykjanes Ridge Current (ERRC) in the Iceland Basin and the northeastward Irminger Current (IC) in the Irminger Sea. To study their interconnection through the ridge, as well as their connections with the interior of each basin, velocity and hydrological measurements were carried out along and perpendicular to the crest of the Reykjanes Ridge in June–July 2015 as part of the RREX project. This new dataset changes our view of the ERRC and IC as it reveals undocumented along‐stream evolutions of their hydrological properties,...
Tipo: Text
Palavras-chave: North-Atlantic Subpolar Gyre; Bathymetry; Oceanic circulation; Observations.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00591/70347/68407.pdf

Surveillance Ecologique du site du Blayais - Année 2015
Provedor de dados: 5
Autores: Quintin, Jean-yves; Sottolichio, Aldo; Derriennic, Herve; Doremus, Sandrine; Agion, Tony; Peset, Sébastien; Hervio Heath, Dominique; Sautour, Benoit; Parra, René; Nowaczyck, Antoine; Bachelet, Guy; Leconte, Michel.
Monitoring n° 38 of the BLAYAIS nuclear power plant takes into account studies conducted between April and November 2015. Physicochemistry, Bathymetry, Contaminants, Bacteriology, Zooplankton, Benthic macrofauna, are reported.
Tipo: Text
Palavras-chave: Centrale nucléaire; Pelagos; Physico chimie; Hydrologie; Microbiologie; Estuaire de la Gironde; Surveillance; Bathymétrie; Zooplancton; Macrofaune benthique.; Nuclear power plant; Pelagos; Physico chemistry; Hydrology; Zooplankton; Gironde estuary; Monitoring; Bathymetry; Benthic macrofauna.; Microbiology.
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00327/43800/43361.pdf

Surveillance écologique du site du Blayais, année 2001
Provedor de dados: 5
Autores: Quintin, Jean-yves.
Monotoring n° 24 of the BLAYAIS nuclear power plant takes into account studies conducted between March and November 2001. Physicochemistry, Hydrobiology, Bacteriology, Zooplankton, Bathymetry, are reported.
Tipo: Text
Palavras-chave: Bathymetry; Zooplancton; Microbiology; Hydrology; Physico chemistry; Pelagos; Monitoring; Gironde estuary; Nuclear power plant; Bathymétrie; Zooplancton; Microbiologie; Hydrologie; Physico chimie; Pelagos; Surveillance; Estuaire de la Gironde; Centrale nucléaire.
Ano: 2002
URL: http://archimer.ifremer.fr/doc/2002/rapport-5932.pdf

Évolution récente et sédimentation des plates-formes continentales de la Corse
Provedor de dados: 5
Autores: Pluquet, Fabrice.
This work aimed at displaying and studying morphological and sedimentological features of Corsican seafloor from the coast to depths of -100m. It also aimed at a better knowledge of sediment dynamics under hydrodynamic conditions, and at a reconstitution of the late Quaternary shorelines evolution.  Careful analysis of the bathymetry has revealed a very contrasted morphology between the different areas of Corsican shelves, as it has been displayed on an synthetic geomorphological map.  In addition, an homogeneous and overall map of surficial sediments of the Corsican shelves seabed was established and two areas, the Balagne and Agriates' platforms to the North of Corsica, and the Bonifacio Straits to the South, were mapped into details. The various...
Tipo: Text
Palavras-chave: Fossil shoreline; Late Quaternary; Habitats mapping; Sidescan sonar; Hydrodynamism; Sédimentology; Morphology; Bathymetry; Continental shelves; Corsica; Geosciences; Paléo rivage; Quaternaire récent; Cartographie d'habitats; Sonar latéral; Hydrodynamisme; Sédimentologie; Morphologie; Bathymétrie; Plates formes continentales; Corse; Géosciences.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/these-3363.pdf

Les peuplements benthiques du plateau insulaire de la Martinique et des zones bathyales adjacentes. Cas particulier de la malacofaune
Provedor de dados: 5
Autores: Paulmier, Gerard; Durand, Francoise.
Several oceanographic surveys in Martinique waters with, as main objectives, either geological mapping and evaluating marine aggregate resources of research into deep water carcinologie resources, nafe produced interesting informtion on benthic pppulations situated from the infralittoral to the bathyal shelf, for the wole of faunistic groups and more specifically for the malacofauna. The distribution of the various faunistic group has been analysed in function to the bathymetric, edaphic and possibly, thermic factors. The infralittoral zones, up to the 20 metres isobath, and circalittoral, between 60  and 80 metres, are known to have the richest populations. Corals, sponges, polychaete annelida and molluscs are the best represented, numerically as well as...
Tipo: Text
Palavras-chave: Ecologie; Sédimentologie; Bathymétrie; Peuplements; Benthos; Invertebrés; Communautés; Bivalves; Gastéropodes; Ecology; Sedimentology; Bathymetry; Settelment; Benthos; Invertebrates; Molluscs; Communities; Bivalvia; Gastropoda.
Ano: 1997
URL: https://archimer.ifremer.fr/doc/00480/59191/61880.pdf

Ultra Wide Swath Sea interferometric multibeam echo sounder with sea bottom imaging system.
Provedor de dados: 5
Autores: Hammerstad, E; Pohner, F.
The SIMRAD EM12 is a new full ocean depth multibeam echo sounder, operating at 13 kHz. By use of interferometric signal processing techniques it will achieve an ultra wide swath geometry of 150 degrees, corresponding to 7.5 times the depth of water. The system will in addition to the bathymetry produce a fully corrected sidescan sonar image of the seafloor, on to the depth soundings, the EM12 has the capability to generate a sidescan image of the seabed.
Tipo: Text
Palavras-chave: Ocean floor; Multibeam sonar; Bathymetry; Signal processing; Sonar imagery; Imaging techniques; Side scan sonar; Echosounding; Echosounders.
Ano: 1990
URL: http://archimer.ifremer.fr/doc/1990/acte-1141.pdf

Bathymetric estimation using MERIS images in coastal sea waters
Provedor de dados: 5
Autores: Minghelli Roman, Audrey; Polidori, Laurent; Mathieu-blanc, Sandrine; Loubersac, Lionel; Cauneau, François.
Bathymetric estimation using remote sensing images has previously been applied to high spatial resolution imagery such as CASI, Ikonos, or SPOT but not on medium spatial resolution images (i.e., MERIS). This choice can be justified when there is a need to map the bathymetry on large areas. In this letter, we present the results of the bathymetry estimation over a large known area, the Gulf of Lion (France), expanding over 270 x 180 km.
Tipo: Text
Palavras-chave: MERIS; Coastal zone; Bathymetry.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/publication-2597.pdf

Slope morphologies offshore Dakhla (SW-Moroccan margin)
Provedor de dados: 5
Autores: Benabdellouahed, Massinissa; Baltzer, Agnes; Rabineau, Marina; Aslanian, Daniel; Sahabi, Mohamed; Germond, Fabien; Loubrieu, Benoit; Biari, Youssef.
This study explores a portion of the West African margin at the junction between two well- known segments offshore Dakhla and offshore Mauritania with destructional architecture characterized by giant slides. In between these two segments, the Dakhla segment has historically been described as a constructional section. During an oceanographic Dakhla cruise (2002), high resolution seismic data, swath bathymetry and imagery were acquired around latitude 23° N, offshore Dakhla,. This new data set reveals the existence of varied and complex morphologies on the continental slope, interpreted as a "shallot-shaped" canyon, seafloor depressions or pockmarks, ridges and scarps. These morphologies are interpreted as clues of sedimentary transfers and rupture...
Tipo: Text
Palavras-chave: African margin; Bathymetry; Seismic interpretation; Pockmarks; Ridges; Scarps.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00286/39736/38214.pdf

Cystoseira baccata meadows along the French Basque coast (Bay of Biscay) as a reference for the implementation of the Water Framework and Marine Strategy EU directives
Provedor de dados: 5
Autores: De Casamajor, Marie-noelle; Derrien-courtel, Sandrine; Lalanne, Yann; Maria Gorostiaga, José; Le Gal, Aodren; Huguenin, Laura; Quintano, Endika; Lissardy, Muriel.
Cystoseira baccata, a biological quality element for the implementation of the Water Framework and Marine Strategy EU Directives, is a dominant species in the subtidal rocky bottoms of the Basque coast. As part of this issue and given the need to better understand the functional character of benthic rocky ecosystems and use them as a reference to anthropogenic changes, two samplings campaigns were conducted in 2014 and 2017. Several population parameters (i.e. frond density, frond length frond-length/total frond-length ratio and taxonomic richness of epibionts) of C. baccata were studied from three sites monitored within the Water Directive Framework in relation to bathymetry during the two campaigns. The results showed a significant influence of...
Tipo: Text
Palavras-chave: Bathymetry; Cystoseira baccata; Epiphytes; Foundation species; Population parameters; Water framework directive.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00500/61151/64581.pdf

Caractérisation des fonds marins et estimation bathymétrique par inversion de modèle de transfert radiatif : Application à l'imagerie hyperspectrale en milieu corallien
Provedor de dados: 5
Autores: Petit, Tristan.
Airborne hyperspectral imaging is a potential candidate for mapping and monitoring coral reefs at large scale and with high spatial resolution. In this thesis, we first present the processing steps to be applied to hyperspectral signals for extracting information about seabed types, bathymetry and water optical properties, and we discuss their efficiency with respect to two main confounding factors: (i) low signal to noise ratio of the measured signals, and (ii) large number and variability of physical interactions occurring between the entrance of sunlight into the atmosphere and its measurement by the hyperspectral sensor. Considering these limitations, we examine the performance of an already existing water column processing method: semi-analytical...
Tipo: Text
Palavras-chave: Récifs coralliens; Bathymétrie; Cartographie des habitats benthiques; Hyperspectral; Modèle de transfert radiatif; Inversion par optimisation; Analyse de sensibilité; Coral reefs; Bathymetry; Seabed type mapping; Hyperspectral; Radiative transfer model; Inversion by optimization; Sensitivity analysis.
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00400/51135/51905.pdf

Surveillance écologique du centre nucléaire de production d'électricité du Blayais. Année 2018
Provedor de dados: 5
Autores: Rumebe, Myriam; Auby, Isabelle; Blanchet, Hugues; Fouet, Marie; Gouriou, Laure; Hervio Heath, Dominique; Sautour, Benoit; Savoye, Nicolas; Sottolichio, Aldo.
Monitoring n° 41 of the Blayais nuclear power plant takes into account studies conducted between April and November 2018. Physicochemistry, Bathymetry, Hydrobiology, Bacteriology, Zooplankton, Benthic macrofauna, are reported.
Tipo: Text
Palavras-chave: Centrale nucléaire; Pelagos; Physico chimie; Hydrologie; Microbiologie; Estuaire de la Gironde; Surveillance; Bathymétrie; Zooplancton; Macrofaune benthique; Nuclear power plant; Pelagos; Physico chemistry; Hydrology; Zooplankton; Gironde estuary; Monitoring; Bathymetry; Microbiology; Benthic macrofauna.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00505/61660/65576.pdf

Surveillance Ecologique du site du "Blayais" - année 2004
Provedor de dados: 5
Autores: Quintin, Jean-yves; Castaing, Patrick; Jouanneau, Jean-marie; Oggian, Georges; Leconte, Michel; Parra, René; Sautour, Benoît; Bachelet, Guy; Chaurial, Bernard; Gournier, Nathalie.
Monotoring n° 27 of the BLAYAIS nuclear power plant takes into account studies conducted between March and November 2004. Physicochemistry, Hydrobiology, Bacteriology, Zooplankton, Benthic macrofauna, Bathymetry, are reported.
Tipo: Text
Palavras-chave: Bathymetry; Benthic macrofauna; Zooplankton; Bacteriology; Hydrobiology; Physicochemistry; Pelagos; Monitoring; Gironde estuary; Nuclear power plant; Bathymétrie; Macrofaune benthique; Zooplancton; Microbiologie; Hydrologie; Physico chimie; Pelagos; Surveillance; Estuaire de la Gironde; Centrale nucléaire.
Ano: 2005
URL: http://archimer.ifremer.fr/doc/2005/rapport-1024.pdf

Hydrologie du Grand Etang de Miquelon. Estimation des flux et renouvellements
Provedor de dados: 5
Autores: Le Moine, Olivier; Geairon, Philippe; Robert, Stephane; Coudray, Sylvain; Fiandrino, Annie; Goraguer, Herle; Goulletquer, Philippe.
This study aims to assess the hydrological fluxes between the ‘Grand Etang’ of Miquelon and the oceanic part. Bathymetric surveys and Doppler current meter data acquisitions were carried out from August 14th, to November 5th, 2014 and from April 1st, to end of July 2015 to allow the following estimates : Total area (227 Ha) and characteristics volumes (total : 6,7 106 m3; oscillating 2,8 106 m3 (40 %); half-tide 5,2 106 m3) Velocity Index of channel to evaluate the average current speed at cross-section channel Fluxes, on flood and ebb tide respectively : Instantaneous flow: maxima at 94,2 et 65 m3/s mean 37.2 et 24.5 m3/s. in 2014 and maxima 85,03 et 73,62 m3/s mean 26,22 et 28,20 m3/s in 2015. Circulating fluxes by tide : maxima 1,06 and 1,09 106 m3,...
Tipo: Text
Palavras-chave: Flux hydrologiques; Courantométrie; Bathymétrie; Grand Etang Miquelon; Modélisation; Hydrological fluxes; Current meter data acquisition; Bathymetry; Grand Etang Miquelon; Modelling.
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00332/44325/43904.pdf

Surveillance Ecologique du site du "Blayais" - année 2017
Provedor de dados: 5
Autores: Rumebe, Myriam; Auby, Isabelle; Hervio Heath, Dominique; Sottolichio, Aldo; Sautour, Benoit; Savoye, Nicolas; Derriennic, Hervé; Blanchet, Hugues; Leconte, Michel; Gouilleux, Benoit; Fouet, Marie; Agion, Tony.
Monitoring n° 40 of the Blayais nuclear power plant takes into account studies conducted between April and November 2017. Physicochemistry, Bathymetry, Hydrobiology, Bacteriology, Zooplankton, Benthic macrofauna, are reported.
Tipo: Text
Palavras-chave: Centrale nucléaire; Pelagos; Physico chimie; Hydrologie; Microbiologie; Estuaire de la Gironde; Surveillance; Bathymétrie; Zooplancton; Macrofaune benthique; Nuclear power plant; Pelagos; Physico chemistry; Hydrology; Zooplankton; Benthic macrofauna; Gironde estuary; Monitoring; Bathymetry; Microbiology.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00477/58876/61407.pdf

Surveillance Ecologique du site du Blayais - Année 2014
Provedor de dados: 5
Autores: Quintin, Jean-yves; Sottolichio, Aldo; Derriennic, Herve; Schmidt, Sabine; Doremus, Sandrine; Agion, Tony; Hervio Heath, Dominique; Sautour, Benoît; Parra, René; Dindinaud, François; Bachelet, Guy; Leconte, Michel.
Monitoring n° 37 of the BLAYAIS nuclear power plant takes into account studies conducted between April and November 2014. Physicochemistry, Bathymetry, Contaminants, Bacteriology, Zooplankton, Benthic macrofauna, are reported.
Tipo: Text
Palavras-chave: Centrale nucléaire; Pelagos; Physico chimie; Hydrologie; Microbiologie; Zooplancton; Macrofaune benthique.; Bathymétrie; Estuaire de la Gironde; Surveillance; Nuclear power plant; Pelagos; Physico chemistry; Hydrology; Zooplankton; Benthic macrofauna.; Bathymetry; Microbiology; Gironde estuary; Monitoring.
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00333/44424/44088.pdf

High-resolution mapping of large gas emitting mud volcanoes on the Egyptian continental margin (Nile Deep Sea Fan) by AUV surveys
Provedor de dados: 5
Autores: Dupre, Stephanie; Buffet, G.; Mascle, J.; Foucher, Jean-paul; Gauger, S.; Boetius, A.; Marfia, Christian.
Two highly active mud volcanoes located in 990-1,265 m water depths were mapped on the northern Egyptian continental slope during the BIONIL expedition of R/V Meteor in October 2006. High-resolution swath bathymetry and backscatter imagery were acquired with an autonomous underwater vehicle (AUV)-mounted multibeam echosounder, operating at a frequency of 200 kHz. Data allowed for the construction of similar to 1 m pixel bathymetry and backscatter maps. The newly produced maps provide details of the seabed morphology and texture, and insights into the formation of the two mud volcanoes. They also contain key indicators on the distribution of seepage and its tectonic control. The acquisition of high-resolution seafloor bathymetry and acoustic imagery maps...
Tipo: Text
Palavras-chave: Eastern Mediterranean; Seafloor morphology; Backscatter; Bathymetry; AUV; Nile Deep Sea Fan; Mud volcanoes.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/publication-6395.pdf

Active faulting and deep crustal structure of the Eastern Sicily Margin
Provedor de dados: 5
Autores: Dellong, David.
In the Ionian Sea (central Mediterranean) the slow convergence between Africa and Eurasia results in the formation of a narrow subduction zone. The nature of the crust of the subducting plate remains debated and could represent the last remnants of the Neo-Tethys ocean. The origin of the Ionian basin is also under discussion, especially concerning the rifting mechanisms as the Malta Escarpment could represent a remnant of this opening. This subduction retreats toward the south-east (motion occurring since the last 35 Ma) but is confined to the narrow Ionian basin. A major lateral slab tear fault is required to accommodate the slab rollback.This fault is thought to propagate along the eastern Sicily margin but its precise location remains controversial.This...
Tipo: Text
Palavras-chave: Méditerranée; Ionien; Calabre; Géodynamique; Marge; Faille de déchirure lithosphérique; Sismicité; Sismique; Grand-angle; Bathymétrie; Gravimétrie; Modélisation; Mediterranean; Ionian; Calabria; Geodynamic; Subduction; Margin; STEP fault; Wide-angle seismic; Seismicity; Bathymetry; Gravity; Modelling.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00499/61026/64430.pdf

Circulation de bord ouest de l'Atlantique Sud: analyse d'observations lagrangiennes et hydrologiques
Provedor de dados: 5
Autores: Legeais, Jean-francois.
The "World Ocean Circulation experiment" (WOCE) program in the 1990s has produced the equivalent of 300 years of subsurface floats trajectories within the Antarctic Intermediate Water (AAIW) at 800dbar in the South Atlantic ocean, and several hydrological transects. In order to compute the western boundary circulation, the flow is vertically extrapolated by referencing geostrophic hydrological profiles to float speeds. Several transects normal to the continental slope and another one parallel to it off the coast give transports of the water masses with a good transversal and longitudinal resolutions. Floats at 800dbar sampled the Intermediate Western Boundary Current (IWBC) particularly well, and enable one to analyse it from 28°S at the bifurcation of the...
Tipo: Text
Palavras-chave: Mesoscale activity; Bathymetry; Hydrological transect; IWBC; AAIW; Western boundary; South Atlantic; Lagrangian floats; Activité de méso échelle; Bathymétrie; Radiale hydrologique; IWBC; AAIW; Bord ouest; Atlantique Sud; Flotteur lagrangien.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/these-6177.pdf

Dynamique de renouvellement des masses d'eaux du Grand Etang de Saint Pierre et Miquelon : rapport préliminaire
Provedor de dados: 5
Autores: Le Moine, Olivier; Geairon, Philippe; Goraguer, Herle; Poitevin, Pierre; Robert, Stephane; Goulletquer, Philippe.
In 2013, the project ‘Assessment of the renewable rate of the seawater masses in the Miquelon ‘Grand Etang’ ‘ focused essentially on (1) building a data set originating from all partners (e.g., DTAM, IGN), (2) preliminary sampling of current patterns so as to facilitate the 2014 field sampling strategy. Besides this approach, a census of aerial pictures dated from 1950, 1990 and 2005 were studied to assess the temporal trends of this geographic sector. The field work to be carried out in 2014 are: 1) Bathymetry: data acquisition in the ‘Grand Etang’ in the area presently used for mussel long lines culture to obtain a comprehensive data set, transversal profiles at the strait level at the near vicinity of the current pattern measuring station. 2) Current...
Tipo: Text
Palavras-chave: Courantométrie; Bathymétrie; Saint Pierre &amp; Miquelon; Current meters; Bathymetry; Saint Pierre &amp; Miquelon.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00175/28581/26975.pdf

Seafloor Characteristics in the Azores Region (North Atlantic)
Provedor de dados: 5
Autores: Peran, Antonio D.; Pham, Christopher K.; Amorim, Patricia; Cardigos, Frederico; Tempera, Fernando; Morato, Telmo.
Tipo: Text
Palavras-chave: Azores; Seafloor characteristics; Bathymetry; Deep sea; Geomorphology; GIS dataset.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00590/70195/68219.pdf

Surveillance écologique du site du Blayais, année 2002
Provedor de dados: 5
Autores: Quintin, Jean-yves.
Monotoring n° 25 of the BLAYAIS nuclear power plant takes into account studies conducted between March and November 2002. Physicochemistry, Hydrobiology, Bacteriology, Zooplankton, Bathymetry, are reported.
Tipo: Text
Palavras-chave: Bathymetry; Zooplancton; Microbiology; Hydrology; Physico chemistry; Pelagos; Monitoring; Gironde estuary; Nuclear power plant; Bathymétrie; Zooplancton; Microbiologie; Hydrologie; Physico chimie; Pelagos; Surveillance; Estuaire de la Gironde; Centrale nucléaire.
Ano: 2003
URL: http://archimer.ifremer.fr/doc/2003/rapport-5935.pdf

The multi-component structuration of the species diversity of groundfish assemblages of the east coast of Corsica (Mediterranean Sea): Variation according to the bathymetric strata
Provedor de dados: 5
Autores: Merigot, B; Bertrand, Jacques; Gaertner, J; Durbec, J; Mazouni, N; Mante, C.
The multi-component aspect of species diversity of groundfish assemblages was examined on the basis of a set of experimental trawl surveys conducted on the east coast of Corsica. We analysed and compared the structuration of diversity within three different bathymetric strata: the continental shelf (60-120 m depth), the upper slope (250-400 m) and the lower slope (450-570 m). For each of these three bathymetric strata, we simultaneously analysed 12 indices that are theoretically complementary and relate to 4 diversity components: (1) the number of species, (2) rarity, (3) evenness and (4) taxonomic diversity. Principal component analysis based on Spearman's correlation coefficients was carried out to investigate empirical relationships between the selected...
Tipo: Text
Palavras-chave: Mediterranean Sea; Corsica; Taxonomic relatedness; Bathymetry; Diversity indices; Demersal fish.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/publication-3512.pdf

Surveillance écologique du site du Blayais, année 2000
Provedor de dados: 5
Autores: Quintin, Jean-yves.
Monotoring n° 23 of the BLAYAIS nuclear power plant takes into account studies conducted between March and November 2000. Physicochemistry, Hydrobiology, Bacteriology, Zooplankton, Bathymetry, are reported.
Tipo: Text
Palavras-chave: Bathymetry; Zooplancton; Microbiology; Hydrology; Physico chemistry; Pelagos; Monitoring; Gironde estuary; Nuclear power plant; Bathymétrie; Zooplancton; Microbiologie; Hydrologie; Physico chimie; Pelagos; Surveillance; Estuaire de la Gironde; Centrale nucléaire.
Ano: 2001
URL: http://archimer.ifremer.fr/doc/2001/rapport-5957.pdf

Morphology, structure, composition and build-up processes of the active channel-mouth lobe complex of the Congo deep-sea fan with inputs from remotely operated underwater vehicle (ROV) multibeam and video surveys
Provedor de dados: 5
Autores: Dennielou, Bernard; Droz, Laurence; Babonneau, Nathalie; Jacq, Celine; Bonnel, Cedric; Picot, Marie; Le Saout, Morgane; Saout, Yohan; Bez, Martine; Savoye, Bruno; Olu, Karine; Rabouille, Christophe.
The detailed structure and composition of turbiditic channel-mouth lobes is still largely unknown because they commonly lie at abyssal water depths, are very thin and are therefore beyond the resolution of hull-mound acoustic tools. The morphology, structure and composition of the Congo turbiditic channel-mouth lobe complex (90×40 km; 2525 km2) were investigated with hull-mounted swath bathymetry, air gun seismics, 3.5 kHz sub-bottom profiler, sediment piston cores and also with high-resolution multibeam bathymetry and video acquired with a Remote Operating Vehicle (ROV). The lobe complex lies 760 km off the Congo River mouth in the Angola abyssal plain between 4740 and 5030 m deep. It is active and is fed by turbidity currents that deposit several...
Tipo: Text
Palavras-chave: Congo deep-sea fan; Lobe; Lobe complex; Channel; Channel-Lobe Transition Zone; Angola basin; Slump; Slide; Debrite; Turbidite; ROV; Bathymetry; Seismic; Sediment core.
Ano: 2017
URL: https://archimer.ifremer.fr/doc/00378/48976/49383.pdf

New structural and geochemical observations from the Pacific-Antarctic Ridge between 52°45'S and 41°15'S
Provedor de dados: 5
Autores: Klingelhoefer, Frauke; Ondreas, Helene; Briais, A; Hamelin, C; Dosso, Laure.
We investigated the morphology and structure of the Pacific-Antarctic Ridge between 52 degrees 45'S and 41 degrees 15'S during the Pacantarctic2 cruise using multibeam echosounder together with gravity measurements and dredges. Analysis of the bathymetric, gravity and geochemical data reveal three ridge segments separated by overlapping spreading centers south of the Menard transform fault (MTF) and five segments north of it. Calculation of the cross-sectional area allows quantification of the variation in size of the axial bathymetric high. Together with the calculation of the mantle Bouguer anomaly, these data provide information about variations in the temperature of the underlying mantle or in crustal thickness. Areas with hotter mantle are found north...
Tipo: Text
Palavras-chave: Mantle Bouguer anomaly; Temperature variations; Geochemistry; Gravity; Bathymetry; Ridge segment.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/publication-2108.pdf

Caractérisation de la circulation autour, au-dessus et à travers (via des zones de fracture) la dorsale de Reykjanes
Provedor de dados: 5
Autores: Petit, Tillys.
The Reykjanes Ridge is a major topographic feature of the North-Atlantic Ocean that extends from Iceland to the Charlie Gibbs Fracture Zone. Located between the Iceland Basin and the Irminger Sea, the Reykjanes Ridge strongly influences the subpolar gyre circulation and is a gate toward the deep convection areas. However, the circulation and distribution across the Reykjanes Ridge has never been directly quantified such that the characterization of the connection between the Iceland Basin and the Irminger Sea is still incomplete. As part of the Reykjanes Ridge Experiment project, we were able to analyze the circulation around, above and across the Reykjanes Ridge. Mainly based on hydrographic sections along and perpendicular to the ridge axis, the aim of...
Tipo: Text
Palavras-chave: Gyre subpolaire Nord-Atlantique; Bathymétrie; Masses d’eau; North-Atlantic; Subpolar gyre; Bathymetry; Water masses; Circulation; Observations.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00498/60969/64377.pdf

Controls on turbidite sedimentation: Insights from a quantitative approach of submarine channel and lobe architecture (Late Quaternary Congo fan)
Provedor de dados: 5
Autores: Picot, M.; Droz, L.; Marsset, Tania; Dennielou, Bernard; Bez, M.
The role of internal and external forcing of sedimentation in turbidite systems remains a subject of debate. Here we propose new insights from the quantitative analysis of architectural parameters of the Congo Axial Fan.  Fifty-two channel-levee-lobe systems, spanning the last ca. 200 ka, are visible on the seafloor, most of them having slightly elongated lobe complexes at their termination. Volumes of lobe complexes (usually 3 to 196 km3) are highly variable in time and space. The cumulative volume of the lobe complexes represents approximately 30% of the volume of the Axial Fan.  The Axial Fan is sequentially divided into periods of increasing/decreasing channel lengths and basinward/landward migrations of avulsion points, representing successive...
Tipo: Text
Palavras-chave: Turbidite system; Congo; Late Quaternary; Lobe complexes; Sedimentary cycles; Avulsion; Bathymetry; Seismic profiles.
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00312/42285/41610.pdf

Cartographie sous-marine: Etat de l'art et problemes
Provedor de dados: 5
Autores: Renard, V.
The side looking sonars have been developed for greater swath coverage, digital processing of the signals has improved the quality of the images and interferometric techniques have been used to determine the depth of the bottom features. A review of the systems existing today is presented. Documents such as graphs, block diagrams, images, maps, sections, created from data acquired at sea level suffer from a filtering or smoothing effect that restricts the representativity of the measured parameters and therefore limits their interpretation. The greater the depth of the seafloor, the greater the filtering. It is due not only to the nature of the measured phenomenon but also the characteristics of the sensors, to their operation and to the data processing....
Tipo: Text
Palavras-chave: Bathymetry; Cartography; Sensors; Echosounders; Acoustic imagery; Acoustics; Ocean floor; Seafloor mapping.
Ano: 1990
URL: http://archimer.ifremer.fr/doc/1990/acte-1147.pdf

Full-Waveform LiDAR Fast Analysis of a Moderately Turbid Bay in Western France
Provedor de dados: 5
Autores: Launeau, Patrick; Giraud, Manuel; Robin, Marc; Baltzer, Agnes.
In shoreline monitoring, only topo-bathymetric light detection and ranging (LiDAR) can map large corridors from aerial dunes to sandbanks in shallow water. Increasing turbidity masking the formation of 532 nm laser beam echoes on the sea bed makes this challenging. Full-waveform recording all the laser beam damping functions, a turbid water column can be seen as an accumulation of layers forming a single continuum and a distinction can be made between signals ending at the bottom down to a depth of 10 m. In practice full-waveforms are converted by laser beam tracing an image cube with a grid of 1-m-wide pixels and a 0.15 m range resolution storing the mean intensities returned along incident angle. The first derivative of a wide Gaussian filter serves to...
Tipo: Text
Palavras-chave: Full-waveform; Airborne LiDAR; Bathymetry; Shoreline monitoring; Turbidity.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00476/58745/61270.pdf

Surveillance écologique du site du Blayais, année 2005
Provedor de dados: 5
Autores: Quintin, Jean-yves.
Monotoring n° 28 of the BLAYAIS nuclear power plant takes into account studies conducted between March and November 2005. Physicochemistry, Hydrobiology, Bacteriology, Zooplankton, Benthic macrofauna, Bathymetry, are reported.
Tipo: Text
Palavras-chave: Bathymetry; Benthic macrofauna; Zooplancton; Microbiology; Hydrology; Physico chemistry; Pelagos; Monitoring; Gironde estuary; Nuclear power plant; Bathymétrie; Macrofaune benthique; Zooplancton; Microbiologie; Hydrologie; Physico chimie; Pelagos; Surveillance; Estuaire de la Gironde; Centrale nucléaire.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/rapport-5933.pdf

Surveillance Ecologique du site du Blayais - Année 2011
Provedor de dados: 5
Autores: Quintin, Jean-yves; Etcheber, Henri; Sottolichio, Aldo; Oggian, Georges; Derriennic, Herve; Mallet, Céline; Roux Ducept, Alexandra; Sautour, Benoît; Parra, René; Bachelet, Guy; Leconte, Michel.
Monitoring n° 34 of the BLAYAIS nuclear power plant takes into account studies conducted between April and November 2011. Physicochemistry, Bathymetry, Contaminants, Bacteriology, Zooplankton, Benthic macrofauna, are reported.
Tipo: Text
Palavras-chave: Centrale nucléaire; Pelagos; Physico chimie; Hydrologie; Microbiologie; Estuaire de la Gironde; Surveillance; Bathymétrie; Zooplancton; Macrofaune benthique.; Nuclear power plant; Pelagos; Physico chemistry; Hydrology; Zooplankton; Gironde estuary; Monitoring; Bathymetry; Benthic macrofauna.; Microbiology.
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00333/44415/44090.pdf

Atlas thématique de l'environnement marin en baie de Saint-Brieuc (Côtes-d'Armor)
Provedor de dados: 5
Autores: Augris, Claude; Hamon, Dominique.
This atlas presents in a synthetic form the hydrodynamical, geological and biological characteristics of one of the most studied region of the French littoral. Geologic and geophysical data of the Saint-Brieuc Bay show that the deep basement consists of pre-palaeozoic or palaeozoic sedimentary series in the centre of the Bay, whereas metamorphic and magmatic formations are dominant in coastal regions. The location of superficial sediments in the Bay, is mainly due to marine currents. A granulometric gradient, from very fine to coarse sediments, appears in two directions: from the coast towards the high sea, and from the west to the east. Rocky substrates disrupt the sediment distribution, with, most of the time, a concentration of coarse sediments near the...
Tipo: Text
Palavras-chave: Atlas; Bathymetry; Bottom topography; Commercial species; Geomorphology; Hydrodynamics; Marine resources; Sediment analysis; Sedimentary basins; Zoobenthos.
Ano: 1996
URL: http://archimer.ifremer.fr/doc/00031/14246/11527.pdf

Eivissa slides, western Mediterranean Sea: morphology and processes
Provedor de dados: 5
Autores: Lastras, Galderic; Canals, M; Amblas, D; Ivanov, M; Dennielou, Bernard; Droz, Laurence; Akhmetzhanov, A.
After obtaining full-coverage swath bathymetry data in 1995 and very high-resolution acoustic profiles in 2002, four slides at the Balearic Margin of the Eivissa Channel in the western Mediterranean Sea were revisited in 2004 when side-scan sonar data were collected using a MAK-1M deep-towed acoustic system. These new findings, higher in resolution than those for the swath bathymetry, show two main features previously undetected within these submarine landslides: (1) a series of step-forming inclined and detached slabs oriented perpendicular to the slide movement and located in the uppermost part of the slides, and (2) arcuate regular positive ridges oriented also normal to the slide movement and located in the depositional lobes of some of the slides. The...
Tipo: Text
Palavras-chave: Morphology; Bathymetry; Slides; Mediterranean sea; Eivissa channel.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/publication-2087.pdf

Modeling of the bottom water flow through the Romanche Fracture Zone with a primitive equation model - Part I: Dynamics
Provedor de dados: 5
Autores: Ferron, Bruno; Mercier, Herle; Treguier, Anne-marie.
This paper investigates the dynamics of the Antarctic Bottom Water (AABW) flow through the Romanche Fracture Zone (RFZ) in a primitive equation model with a high horizontal and vertical resolution. Two examples of Rows over simple bathymetries show that a reduced gravity model captures the essential dynamics of the primitive equation model. The reduced gravity model is then used as a tool to identify what are the bathymetric structures (sills, narrows) that mostly constrain the AABW flow through the RFZ. When only these structures are represented in the primitive equation model, the AABW how is shown to be coherent with observations (transports, density and velocity structures).
Tipo: Text
Palavras-chave: Circulation model; Fracture zone; Bottom water; Bathymetry.
Ano: 2000
URL: http://archimer.ifremer.fr/doc/2000/publication-802.pdf

Fish Species in a Changing World: The Route and Timing of Species Migration between Tropical and Temperate Ecosystems in Eastern Atlantic
Provedor de dados: 5
Autores: Kaimuddin, Awaluddin H.; Laë, Raymond; Tito De Morais, Luis.
The presence of tropical species has been reported in Atlantic-European waters with increasing frequency in recent years. Unfortunately, the history of their migrations is not well understood. In this study, we examined the routes and timing of fish migrations in several ecosystems of the East Atlantic Ocean, combining several publicly available and unpublicized datasets on species occurrences. The species studied were those noted as exotic or rare outside their previous known area of distribution. We used sea surface temperature (SST) data obtained from 30 years of satellite observation to define three distinct time periods. Within these periods, temperature trends were studied in six ecosystems: the North Sea, the Celtic Sea, the South European Atlantic...
Tipo: Text
Palavras-chave: Speciesmigration; Atlantic-europeanwaters; Biogeographic; SST; Bathymetry; GIS.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00469/58030/60434.pdf

Surveillance Ecologique du site du "Blayais" - année 2007
Provedor de dados: 5
Autores: Quintin, Jean-yves; Castaing, P; Jouanneau, J. M.; Oggian, G; Chaurial, B; Gournier, N; Sautour, B; Parra, R; Bachelet, G; Leconte, M.
Monitoring n° 30 of the BLAYAIS nuclear power plant takes into account studies conducted between April and November 2007. Physicochemistry, Bathymetry, Hydrobiology, Bacteriology, Zooplankton, Benthic macrofauna, are reported.
Tipo: Text
Palavras-chave: Benthic macrofauna; Zooplankton; Microbiology; Hydrology; Bathymetry; Physico chemistry; Pelagos; Monitoring; Gironde estuary; Nuclear power plant; Macrofaune benthique; Zooplancton; Microbiologie; Hydrologie; Bathymétrie; Physico chimie; Pelagos; Surveillance; Estuaire de la Gironde; Centrale nucléaire.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/rapport-5373.pdf

Un bilan de la télédétection appliquée aux milieux coralliens
Provedor de dados: 5
Autores: Andrefouet, Serge; Maritorena, Stéphane; Loubersac, Lionel.
The aim of this paper is to present in a practical fashion the status of the use of remote sensing for the study of coral reef environments through the analysis of work published in the years 1980-2000. We review the scales of the potential work and of that actually conducted, the principal applications and their limiting factors. We detail these limitations which are of a technological nature (spatial and spectral resolution of sensors), as well as often of a conceptual (role of remote sensing in the study) or methodological (image processing) nature. The understanding of these limitations, in relation to the reality of the field, allows identification of work which could be undertaken in the years 2000.
Tipo: Text
Palavras-chave: Télédétection; Récifs coralliens; Cartographie; Bathymétrie; Classification; Segmentation; Remote sensing; Coral reefs; Mapping; Bathymetry; Classification; Segmentation.
Ano: 2000
URL: http://archimer.ifremer.fr/doc/00089/20044/17685.pdf

Surveillance écologique du site du Blayais - année 2012
Provedor de dados: 5
Autores: Quintin, Jean-yves; Sottolichio, Aldo; Derriennic, Hervé; Schmidt, Sabine; Mallet, Céline; Roux Ducept, Alexandra; Sautour, Benoît; Parra, René; Dindinaud, François; Bachelet, Guy; Leconte, Michel.
Monitoring n° 35 of the BLAYAIS nuclear power plant takes into account studies conducted between April and November 2012. Physicochemistry, Bathymetry, Hydrobiology, Bacteriology, Zooplankton, Benthic macrofauna, are reported.
Tipo: Text
Palavras-chave: Centrale nucléaire; Estuaire de la Gironde; Surveillance; Pelagos; Physico chimie; Bathymétrie; Hydrologie; Microbiologie; Zooplancton; Macrofaune benthique; Nuclear power plant; Gironde estuary; Monitoring; Pelagos; Physico chemistry; Bathymetry; Hydrology; Microbiology; Zooplankton; Benthic macrofauna.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00141/25181/23287.pdf

Dynamique sédimentaire et évolution holocène d'un système macrotidal semi-fermé : l'exemple de la rade de Brest
Provedor de dados: 5
Autores: Gregoire, Gwendoline.
The bay of Brest is a tide-dominated, semi-enclosed coastal basin, which is connected with two rivers (Aulne and Elorn). Its jagged shoreline and seabed morphology constitute an ideal setting to understand sedimentary transfer at the land-sea interface. In this aim, this study is divided in two different time scale. The first (a) focuses on the present-day sedimentary bedload dynamic and the second (b) on the reconstruction of the Holocene infilling, during the last marine transgression. (a) A analyse combining a sedimentology approach and numerical has highlighted the major control of the tidal currents. Swells and rivers have a minor impact, because the inherited morphology accentuates and promotes tidal currents. There are responsible of a shelly sandy...
Tipo: Text
Palavras-chave: Dynamique sédimentaire; Holocène; Paléo-vallée; Estuaire; Système côtier; Rade de Brest; Carottages; Sismique-réflexion; Imagerie; Bathymétrie; Seismic reflection; Coastal system; Bay of Brest; Coring; Paleo-valley; Estuary; Sedimentary dynamic; Backscatter imagery; Bathymetry.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00498/60920/64282.pdf

The morpho-sedimentology of an artificial roadstead (Cherbourg, France)
Provedor de dados: 5
Autores: Gregoire, G.; Méar, Y.; Poizot, E.; Marion, C.; Murat, A.; Hebert, B.
Because of its size and geographical position, the Cherbourg roadstead appears as a favourable site for Marine Renewable Energy (MRE) industry. As a result, Cherbourg harbour has undergone profound changes (2015 and 2016) due to the installation of industrial infrastructures to service the needs of expanding MRE further offshore. However, little is known about the morpho-sedimentary distribution and associated dynamics of seabed sediments before and after harbour transformations. This study focuses on sedimentary dynamics using detailed morphological and sedimentological analyses based on data acquired before changes (2012). The main map includes a unique bathymetric map (1:35,000) and sedimentary maps showing the percentage of the characteristic grain...
Tipo: Text
Palavras-chave: Morphology; Sedimentology; Morphodynamic; Granulometry; Bathymetry; Cherbourg roadstead.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00515/62638/67005.pdf

A Measurement Quality Factor for Swath Bathymetry Sounders
Provedor de dados: 5
Autores: Lurton, Xavier; Augustin, Jean-marie.
The quality estimation associated with individual soundings measured and computed by swath bathymetry sonars is a paramount issue which is most often imperfectly addressed today by sonar manufacturers. In this paper, a unified definition is proposed for a quality factor usable for all swath bathymetry sonars; the depth-relative error is directly estimated from the signal characteristics used in the sounding computation. The basic algorithms are presented for both phase-difference (oblique incidence) and amplitude (normal incidence) detection, and can be readily implemented in any swath bathymetry system using these detection principles. This approach gives a direct access to the objective bathymetric performance of individual soundings, and hence avoids...
Tipo: Text
Palavras-chave: Bathymetry; Interferometry; Multibeam echosounder (MBES); Sonar.
Ano: 2010

Surveillance écologique du site du Blayais. Année 1999
Provedor de dados: 5
Autores: Quintin, Jean-yves; Castaing, Patrice; Jouanneau, Jean-marie; Oggian, Georges; Leconte, Michel; Parra, René; Sautour, Benoît; Chaurial, Bernard; Serceau, Roselyne.
Monitoring n°22 of the BLAYAIS nuclear power plant takes into account studies conducted between April and November 1996. Physicochemistry, Hydrobiology, Bacteriology, Zooplankton, Bathymetry, are reported. [see summary p. 251-252 (in french)]
Tipo: Text
Palavras-chave: Centrale nucleaire; Estuaire de la Gironde; Surveillance; Pelagos; Hydrologie; Microbiologie; Zooplancton; Bathymetrie; Physico chimie; Nuclear power plant; Gironde estuary; Monitoring; Pelagos; Hydrology; Microbiology; Zooplancton; Bathymetry; Physico chemistry.
Ano: 2000
URL: http://archimer.ifremer.fr/doc/00384/49528/50025.pdf

An example of GIS potentiality for coastal zone management: preselection of submerged oyster culture areas near Marennes-Oleron (France)
Provedor de dados: 5
Autores: Durand, H.; Guillaumont, Brigitte; Loarer, Ronan; Loubersac, Lionel; Heral, Maurice; Prou, Jean.
The Charente Maritime coast, in central western France, is the most important area for oyster and mussel production in Europe. High density, in this restricted intertidal area, induces low growing rate and socio-economic difficulties. One of the possible solutions is to shift some oysters from intertidal area to submerged areas. Bathymetry, sedimentology, hydrodynamism, fisheries and administrative rules are some conditions which are considered to establish the better selection of potential zone. The successive steps of setting up the prototype of GIS are presented: digitized traditional data from charts, extracted data from grid models (hydrodynmaic model), merging of thematic covers, proposal of favorable areas. The results are discussed especially on...
Tipo: Text
Palavras-chave: GIS; Modelisation; Bathymetry; Sedimentology; Hydrodynamism; Marennes Oleron.
Ano: 1994
URL: http://archimer.ifremer.fr/doc/00017/12784/9725.pdf

Bathymétrie du secteur atlantique du banc Porcupine (ouest de l'Irlande) au cap Finisterre (Espagne)
Provedor de dados: 5
Autores: Brenot, Roger; Berthois, Leopold.
Tipo: Text
Palavras-chave: Fishing; Bay of Biscay; Geomorphology; Continental shelf; Mapping; Bathymetry.
Ano: 1962
URL: http://archimer.ifremer.fr/doc/1962/publication-2100.pdf

Tectonic expression of an active slab tear from high-resolution seismic and bathymetric data offshore Sicily (Ionian Sea)
Provedor de dados: 5
Autores: Gutscher, Marc-andre; Dominguez, Stephane; Mercier De Lepinay, Bernard; Pinheiro, Luis; Gallais, Flora; Babonneau, Nathalie; Cattaneo, Antonio; Le Faou, Yann; Barreca, Giovanni; Micallef, Aaron; Rovere, Marzia.
Subduction of a narrow slab of oceanic lithosphere beneath a tightly curved orogenic arc requires the presence of at least one lithospheric scale tear fault. While the Calabrian subduction beneath southern Italy is considered to be the type example of this geodynamic setting, the geometry, kinematics and surface expression of the associated lateral, slab tear fault offshore eastern Sicily remain controversial. Results from a new marine geophysical survey conducted in the Ionian Sea, using high-resolution bathymetry and seismic profiling reveal active faulting at the seafloor within a 140 km long, two-branched fault system near Alfeo Seamount. The previously unidentified 60 km long NW trending North Alfeo Fault system shows primarily strike-slip kinematics...
Tipo: Text
Palavras-chave: Slab tear; Subduction; Mediterranean; Bathymetry; Seismics; Active faults.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00318/42924/42421.pdf

The use of multibeam backscatter and bathymetry as a means of identifying faunal assemblages in a deep-sea cold seep
Provedor de dados: 5
Autores: Sen, Arunima; Ondreas, Helene; Gaillot, Arnaud; Marcon, Yann; Augustin, Jean-marie; Olu, Karine.
Deep-sea ecosystems have attracted considerable commercial interest in recent years because of their potential to sustain a diverse range of mankind's industrial needs. If these systems are to be preserved or exploited in a sustainable manner, mapping habitats and species distributions is critical. As biodiversity at cold-seeps or other deep-sea ecosystems is driven by habitat heterogeneity, imagery is the obvious choice for characterizing these systems and has indeed proven extremely valuable towards mapping biogenic habitats formed by dense aggregations of large sized species, such as coral reefs, tubeworm bushes or bivalve beds. However, the acquisition of detailed images with resolution sufficient for reliable identification is extremely time...
Tipo: Text
Palavras-chave: Mapping; Cold seeps; Multibeam; Bathymetry; Backscatter; Biogenic habitats.
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00312/42286/41612.pdf

Active tectonics of the Calabrian subduction revealed by new multi-beam bathymetric data and high-resolution seismic profiles in the Ionian Sea (Central Mediterranean)
Provedor de dados: 5
Autores: Gutscher, Marc-andre; Kopp, Heidrun; Krastel, Sebastian; Bohrmann, Gerhard; Garlan, Thierry; Zaragosi, Sebastien; Klaucke, Ingo; Wintersteller, Paul; Loubrieu, Benoit; Le Faou, Yann; San Pedro, Laurine; Dominguez, Stephane; Rovere, Marzia; De Lepinay, Bernard Mercier; Ranero, Cesar; Sallares, Valenti.
The detailed morphology and internal structure of the Calabrian accretionary wedge and adjacent Eastern Sicily margin are imaged in unprecedented detail by a combined dataset of multi-beam bathymetry and high-resolution seismic profiles. The bathymetric data represent the results of 6 recent marine geophysical surveys since 2010 as well as a compilation of earlier surveys presented as a 2 arc-sec (60 m) grid. Several distinct morpho-tectonic provinces are identified including: the deeply incised Malta–Hyblean Escarpment, numerous submarine canyons, broad regions of relatively flat seafloor dominated by fields of sediment waves, the gently undulating anticlinal fold-and-thrust belts of the external Calabrian accretionary wedge and the adjacent portion of...
Tipo: Text
Palavras-chave: Subduction; Active faults; Eurasia-Africa plate boundary; Bathymetry; Seismic profiles; Accretionary wedge.
Ano: 2017
URL: https://archimer.ifremer.fr/doc/00366/47685/47853.pdf

Effect of seafloor depth on phytoplankton blooms in high-nitrate, low-chlorophyll (HNLC) regions
Provedor de dados: 5
Autores: Tyrrell, T.; Merico, A.; Waniek, J. J.; Wong, C. S.; Metzl, N.; Whitney, F.
We calculated correlations between seafloor depth and phytoplankton blooms in all three main high-nitrate, low-chlorophyll (HNLC) regions, but with a particular focus on the subarctic North Pacific area. It has long been known that the central parts of the east and west subarctic North Pacific are HNLC regions. The deep western basin of the Bering Sea is also HNLC, whereas the wide continental shelf of the eastern Bering Sea is not. We carried out a statistical comparison of spatial maps of (1) seafloor depth and (2) chlorophyll a concentration from satellite data. This comparison reveals that shallow waters have, on average, higher peak chlorophyll a concentrations (more intense phytoplankton blooms) than deep waters (p &lt;&lt; 0.01). Possible artifacts...
Tipo: Text
Palavras-chave: Phytoplankton; Ocean color; Bathymetry; HNLC; North Pacific; Iron.
Ano: 2005
URL: https://archimer.ifremer.fr/doc/00232/34337/32758.pdf

Surveillance écologique du site du Blayais, année 2003
Provedor de dados: 5
Autores: Quintin, Jean-yves.
Monotoring n° 26 of the BLAYAIS nuclear power plant takes into account studies conducted between March - April and November 2003. Physicochemistry, Hydrobiology, Bacteriology, Zooplankton, Bathymetry, are reported.
Tipo: Text
Palavras-chave: Bathymetry; Zooplancton; Microbiology; Hydrology; Physico chemistry; Pelagos; Monitoring; Gironde estuary; Nuclear power plant; Bathymétrie; Zooplancton; Microbiologie; Hydrologie; Physico chimie; Pelagos; Surveillance; Estuaire de la Gironde; Centrale nucléaire.
Ano: 2004
URL: http://archimer.ifremer.fr/doc/2004/rapport-5934.pdf

Surveillance Ecologique du site du "Blayais" - année 2006
Provedor de dados: 5
Autores: Quintin, Jean-yves; Castaing, Patrice; Jouanneau, Jean-marie; Oggian, Georges; Chaurial, Bernard; Gournier, Nathalie; Sautour, Benoît; Parra, René; Bachelet, Guy; Leconte, Michel.
Monitoring n° 29 of the BLAYAIS nuclear power plant takes into account studies conducted between April and November 2006. Physicochemistry, Bathymetry, Hydrobiology, Bacteriology, Zooplankton, Benthic macrofauna, are reported. [see summary p. 7 - 10 (in French)]
Tipo: Text
Palavras-chave: Benthic macrofauna; Zooplankton; Microbiology; Hydrology; Bathymetry; Physico chemistry; Pelagos; Monitoring; Gironde estuary; Nuclear power plant; Macrofaune benthique; Zooplancton; Microbiologie; Hydrologie; Bathymétrie; Physico chimie; Pelagos; Surveillance; Estuaire de la Gironde; Centrale nucléaire.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/rapport-2572.pdf

Simple method for multiple soundings extraction for wide beamwidth echosounders
Provedor de dados: 5
Autores: Le Bouffant, Naig; Berger, Laurent; Lurton, Xavier.
Bathymetric multibeam echosounders (MBES) classically improve their bottom detection resolution by increasing the number of beams with narrower beamwidths. Many independent detections are thus obtained when extracting one sounding in each beam. However when the pulse footprint on the bottom gets narrower than the beamwidth, which often happens at high incidence angles, it is possible to extract several independent bottom detections within the same beam. These high-density soundings extraction methods present a still higher interest for MBES designed with rather “wide” beams (say 3° or more), so as to offer other benefits, such as compacity, low-cost, or low sidelobe levels as for fishery applications. This paper presents a simple way to derive multiple...
Tipo: Text
Palavras-chave: Multibeam; Bathymetry; Interferometry; Beamwidth.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00146/25719/23801.pdf

First direct estimates of volume and water mass transports across the Reykjanes Ridge
Provedor de dados: 5
Autores: Petit, Tillys; Mercier, Herle; Thierry, Virginie.
The Reykjanes Ridge is a major topographic feature located south of Iceland in the North‐Atlantic Ocean that strongly influences the subpolar gyre (SPG) circulation. Based on velocity and hydrographic measurements carried out along the crest of the Reykjanes Ridge from the Icelandic continental shelf to 50°N during the RREX cruise in June – July 2015, we derived the first direct estimates of volume and water mass transports over the Reykjanes Ridge. North of 53.15°N, circulation was mainly westward; south of this latitude it was mainly eastward. The westward transport was estimated at 21.9 ± 2.5 Sv (Sv = 106 m3 s‐1) and represents the SPG intensity. The westward flows followed two main pathways at 57°N near the Bight Fracture Zone and at 59 – 62°N. We...
Tipo: Text
Palavras-chave: North Atlantic subpolar gyre; Bathymetry; Water masses; Circulation; Observations.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00454/56604/58296.pdf

bathymetric chart of alexandria wastern harbor
Provedor de dados: 20
Autores: El-Geziry, T.M.; Abd Ellah, R.G.; Maiyza, I.A.
Alexandria Eastern Harbor is a shallow, protected, semi-enclosed, circular basin. It is connected to the Mediterranean Sea through two openings: El-Boughaz (main) and El-Silsila. New data, from a recent bathymetric survey in the Harbor, is used to build up its bathymetric chart. The bottom of the Harbor slopes gradually seawards, with an average depth of 5m inside the Harbor. The study build up Alexandria Eastern Harbor new bathymetric chart, will be a useful tool to follow-up the problems of the harbor and to propose suitable solutions. Recommendations are set in the end of the study to activate the self recovery (by the Harbor water body) to preserve and recover the situation of Alexandria Eastern Harbor.
Tipo: Journal Contribution
Palavras-chave: Environmental Field Study; Bathymetry; Bathymetric charts.
Ano: 2007
URL: http://hdl.handle.net/1834/1897

Levantamiento hidrográfico realizado en Punta Fort Williams (Isla Greenwich) durante la VIII Expedición Ecuatoriana a la Antártica
Provedor de dados: 20
Autores: Zapata C., C.
Durante la VIII Expedición Antártica se realizaron trabajos geodésicos, batimétricos y observación de mareas en Punta Fort Williams. El Objetivo de estos trabajos fue obtener la información necesaria para realizar la actualización de la Carta INT 91222 y la posterior publicación de la Carta Naútica. la cual servirá como aporte a la seguridad de la navegación en el área Antártica.
Tipo: Journal Contribution
Palavras-chave: Marine geodesy; Bathymetry.
Ano: 2002
URL: http://hdl.handle.net/1834/3820

A General formatting system for geo-referenced data. vol. 3: Standard subsets of GF3
Provedor de dados: 20
Tipo: Book
Palavras-chave: Oceanography; Geophysical data; Sea level; Sea level measurement; Wave analysis; Wave data; Wave height; Wave measurement; Sea surface; Drifting data buoys; Bathymetric data; Bathymetry; Mean sea level; Sea level; Http://aims.fao.org/aos/agrovoc/c_34115.
Ano: 1996
URL: http://hdl.handle.net/1834/2798

Contribution à l'étude des caractéristiques morphologiques de l'unité littorale de Côte d'Ivoire, Golfe de Guinée: cas du périmètre littoral de Port-Bouet
Provedor de dados: 20
Autores: Koffi, Koffi Ph.; Affian, Kouadio; Abé, Jacques.
Les cartes bathymétriques, et les profils de plage du périmètre littoral de Port-Bouet constituent les documents de base de cette étude. Une analyse cartographique appropriée (cartes bathymétriques et cartes des pentes)a permis de définir des types de plage (s.l.) susceptibles de donner des indications sur la relation morphologie-sédimentologie. Ces analyses mettent en évidence les trois grandes sous unités morphologiques du littoral de Vridi-Port-Bouet: le domaine à l'ouest du canal de vridi en engraissement,au profil bathymétrique convexe, le domaine de la baie de Port-Bouet en érosion et le domaine à l'est de la baie de Port-Bouet en érosion ou en équilibre dynamique.
Tipo: Journal Contribution
Palavras-chave: Shelf sedimentation; Coastal landforms; Bathymetry.
Ano: 1993
URL: http://hdl.handle.net/1834/5471

A new morphometric study of Carioca Lake, Parque Estadual do Rio Doce (PERD), Minas Gerais State, Brazil - DOI: 10.4025/actascibiolsci.v32i1.4990
Provedor de dados: 3
Autores: Bezerra-Neto, José Fernandes; UFMG; Briguenti, Ludmila Silva; UFMG; Pinto-Coelho, Ricardo Motta; UFMG.
Carioca Lake is located within the limits of the Rio Doce State Park, in the eastern part of the state of Minas Gerais. This park, one of the largest natural reserves of the Atlantic Rain Forest in Brazil, is a hotspot of tropical biodiversity. The purpose of this study was to update existing information on the bathymetry and morphometric features of the lake, using differential GPS (DGPS) technology for data collection, coupled to a digital echo sounder. The bathymetry was based on the acquisition of 1106 points, where the depths as well as the geographic coordinates were obtained. The new study allowed the refinement of existing primary and secondary morphometric data for this lake.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: 2.05.03.00-8 Carioca Lake; Bathymetry; Morphometric parameters; Mapping Limnologia física Carioca Lake; Bathymetry; Morphometric parameters; Mapping.
Ano: 2009
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/4990

Morphometry and mixing regime of a tropical lake: Lake Nova (Southeastern Brazil)
Provedor de dados: 42
Autores: GONÇALVES,MONICA A.; GARCIA,FÁBIO C.; BARROSO,GILBERTO F.
ABSTRACT Lake Nova (15.5 km2) is the second largest lake in the Lower Doce River Valley (Southeastern Brazil). A better understanding of ecosystem structure and functioning requires knowledge about lake morphometry, given that lake basin form influences water column stratification. The present study aims to contribute to the understanding of relationship between morphometry and mixing patterns of deep tropical lakes in Brazil. Water column profiles of temperature and dissolved oxygen were taken on four sampling sites along the lake major axis during 2011, 2012 and 2013. The bathymetric survey was carried out in July 2011, along 131.7 km of hydrographic tracks yield 51,692 depth points. Morphometric features of lake size and form factors describe the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Lake morphometry; Bathymetry; Tropical lakes; Mixing pattern; Geographic information system.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652016000401341

A commented list of Scaphopoda (Mollusca) found along the Brazilian coast, with two new synonymies in the genus Gadila Gray, 1847
Provedor de dados: 49
Autores: Souza,Leonardo Santos de; Araújo,Isabella Campos Vieira; Caetano,Carlos Henrique Soares.
This review aims to present an updated checklist of scaphopods, based mainly on literature database. There is a total of 40 species (six families) for Brazil, including information about the distribution and bathymetric range of each taxon. We propose two synonyms with the aid of morphometry of the shell, for the genus Gadila: G. longa as junior synonym of G. elongata and G. robusta as junior synonym of G. pandionis.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Scaphopods; Morphometry; Synonyms; Distribution; Bathymetry.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032013000200227