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Registros recuperados: 49
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A 1.2 Ma record of glaciation and fluvial discharge from the West European Atlantic margin ArchiMer
Toucanne, Samuel; Zaragosi, S.; Bourillet, Jean-francois; Gibbard, P. L.; Eynaud, F.; Giraudeau, J.; Turon, J. L.; Cremer, M.; Cortijo, E.; Martinez, P.; Rossignol, L..
The correlation of continental sedimentary records with the marine isotope stratigraphy is a challenge of central importance in Quaternary stratigraphy, particularly in Western Europe where long records of glaciation on land areas are particularly rare. Here we demonstrate for the first time the interrelationship of events during the last 1.2 Ma in an ocean-sediment core from the Bay of Biscay (NE Atlantic), SW of the Channel. The identification of discharge variations from tributary river systems to the 'Fleuve Manche' palaeoriver during glacio-eustatic sea-level lowstands demonstrates the correlation of the marine sediment stratigraphy to the expansion and recession of the European ice-sheets. The amplitude and chronology of European ice-sheet...
Tipo: Text Palavras-chave: Middle pleistocene transition; Ice sheet dynamics; Sea level; Climate change; North Atlantic; English channel; Heinrich events; Fleuve manche; Deep; Origin.
Ano: 2009 URL: http://archimer.ifremer.fr/doc/2009/publication-6956.pdf
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A General formatting system for geo-referenced data. vol. 3: Standard subsets of GF3 OceanDocs
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
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An assessment of global and regional sea level for years 1993-2007 in a suite of interannual CORE-II simulations ArchiMer
Griffies, Stephen M.; Yin, Jianjun; Durack, Paul J.; Goddard, Paul; Bates, Susan C.; Behrens, Erik; Bentsen, Mats; Bi, Daohua; Biastoch, Arne; Boening, Claus W.; Bozec, Alexandra; Chassignet, Eric; Danabasoglu, Gokhan; Danilov, Sergey; Domingues, Catia M.; Drange, Helge; Farneti, Riccardo; Fernandez, Elodie; Greatbatch, Richard J.; Holland, David M.; Ilicak, Mehmet; Large, William G.; Lorbacher, Katja; Lu, Jianhua; Marsland, Simon J.; Mishra, Akhilesh; Nurser, A. J. George; Salas Y Melia, David; Palter, Jaime B.; Samuels, Bonita L.; Schroeter, Jens; Schwarzkopf, Franziska U.; Sidorenko, Dmitry; Treguier, Anne-marie; Tseng, Yu-heng; Tsujino, Hiroyuki; Uotila, Petteri; Valcke, Sophie; Voldoire, Aurore; Wang, Qiang; Winton, Michael; Zhang, Xuebin.
The Palomares Margin, an NNE–SSW segment of the South Iberian Margin located between the Alboran and the Algerian–Balearic basins, is dissected by two major submarine canyon systems: the Gata (in the South) and the Alías–Almanzora (in the North). New swath bathymetry, side-scan sonar images, accompanied by 5 kHz and TOPAS subbottom profiles, allow us to recognize these canyons as Mediterranean examples of medium-sized turbidite systems developed in a tectonically active margin. The Gata Turbidite System is confined between residual basement seamounts and exhibits incised braided channels that feed a discrete deep-sea fan, which points to a dominantly coarse-grained turbiditic system. The Alías–Almanzora Turbidite System, larger and less confined, is a...
Tipo: Text Palavras-chave: Sea level; CORE global ocean-ice simulations; Steric sea level; Global sea level; Ocean heat content.
Ano: 2014 URL: http://archimer.ifremer.fr/doc/00188/29904/28349.pdf
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Análisis del comportamiento de la salinidad (intrusión salina) en el sistema Río Guayas Canal de Jambelí como parte del cambio climático OceanDocs
Arreaga Vargas, P..
El presente trabajo permite conocer el comportamiento de la cuña salina en el sistema Río Guayas - Canal de Jambelí, conociendo que el Río Guayas abastece de agua a Guayaquil, puerto principal del país, y a muchas otras poblaciones.
Tipo: Journal Contribution Palavras-chave: Water quality; Sea level; Climatic changes; Salt-wedge estuaries; Salt wedges; Salinity gradients; Irrigation water; River water; Rivers; Water quality; Irrigation water; Rivers; Sea level; Http://aims.fao.org/aos/agrovoc/c_16061; Http://aims.fao.org/aos/agrovoc/c_3958; Http://aims.fao.org/aos/agrovoc/c_6617; Http://aims.fao.org/aos/agrovoc/c_34115.
Ano: 2000 URL: http://hdl.handle.net/1834/2274
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Caracterización del régimen de mareas y corrientes a lo largo del canal Moraleda (43° 54' S - 45° 17' S) OceanDocs
Fierro, J.; Bravo, M.; Castillo, M..
Sea level and currents in “Boca del Guafo” and Moraleda channel are studied using statististical and Fourier (harmonic) analyses. The data were collected using oceanographic instruments that covered a wide geographical area, from the northern most point of Moraleda channel to Darwin channel. The results of the harmonic analysis indicated that the area has a semidiurnal tide with a 12-minute phase shift between the ports of Melinka and Lagunas. This result shows that the tidal wave does not only propagate along the Moraleda channel, but at the same time enters the region through several transversal channels that connect the Pacific Ocean with the Moraleda channel. Along the main channel (Moraleda) no reverse current was recorded, which is an unusual...
Tipo: Journal Contribution Palavras-chave: Tides; Ocean currents; Channels; Current velocity; Sea level; Tides; Ocean currents; Sea level; Http://aims.fao.org/aos/agrovoc/c_7764; Http://aims.fao.org/aos/agrovoc/c_12883; Http://aims.fao.org/aos/agrovoc/c_34115.
Ano: 2000 URL: http://hdl.handle.net/1834/1577
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Contribution of the Amazon River Discharge to Regional Sea Level in the Tropical Atlantic Ocean ArchiMer
Giffard, Pierrick; Llovel, William; Jouanno, Julien; Morvan, Guillaume; Decharme, Bertrand.
Tipo: Text Palavras-chave: Sea level; Amazon River; River plume; Salinity; Model; NEMO; Tropical Atlantic.
Ano: 2019 URL: https://archimer.ifremer.fr/doc/00591/70268/68327.pdf
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Coral Reef and High Sea Level at Luhuitou, Hainan Island during the Holocene. OceanDocs
Huang, Deyin; Shi, Qi; Zhang, Yechun.
According to the field survey and 14C dating at Luhuitou, southern Hainan Island, a subsiding area, the authors conclude the high sea level history recorded by coral reef in the Holocene. At least 4 sea level high-stands can be identified from the distribution of coral reef ages: 7300 - 6000 cal.aBP, 4800 - 4700 cal.aBP, 4300 - 4200 cal.aBP and 3100 - 2900 cal.aBP. The highest sea level occurred around 7300 - 6700 cal.aBP, and biological-morphological zones took their shape during the stage. The later coral reefs developed in ponds, depressions, and developed outwards on both sides of Luhuitou peninsula. The modern coral reefs are developing in out reef flat and reef-front slope. Moreover, the time of high sea levels in the northern South China Sea...
Tipo: Journal Contribution Palavras-chave: Coral reefs; Sea level; Holocene.
Ano: 2007 URL: http://hdl.handle.net/1834/5863
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Effect of river runoff on sea level from in-situ measurements and numerical models in the Bay of Biscay ArchiMer
Laiz, Irene; Ferrer, Luis; Plomaritis, Theocharis A.; Charria, Guillaume.
Daily time series of in-situ tide gauge records and river runoff data were analysed to investigate the contribution of river discharge storm events to sea level in the Bay of Biscay. Three main river systems were considered for this study, representing cases of small (Nervión, 1900 km2), medium (Adour, 16880 km2) and large (Gironde, 84811 km2) watershed basins. Typical storms correspond to water discharge rates of 150, 700, and 1100 m3 s−1 from the Nervión, Adour, and Gironde rivers, respectively. The effect of these events on daily mean sea level was evaluated using two different approaches: (1) through the analysis of time series of tide gauges placed within the river mouths; and (2) through numerical simulations using the ROMS model (Regional Ocean...
Tipo: Text Palavras-chave: Bay of Biscay; Sea level; Tide gauges; River discharge; ROMS modelling.
Ano: 2014 URL: http://archimer.ifremer.fr/doc/00169/28070/26285.pdf
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El Niño 2006-2007. Desarrollo y manifestaciones en aguas ecuatorianas OceanDocs
Zambrano, E..
Se revisan las características generales de los eventos El Niño en el Pacífico Tropical y la manera como se manifiestan frente a las costas del Ecuador. Se analiza la elevación del nivel del mar en la estación de La Libertad y se compara con el contenido de calor en el Pacífico central. Utilizando la información de las boyas del programa TAO se analiza la propagación de temperatura y altura dinámica desde el Pacífico ecuatorial occidental hasta el borde oriental. De igual manera se analiza el arribo de ondas ecuatoriales al borde oriental del Pacífico y su incidencia en el nivel medio del mar. El Niño 2006-07 concluyó rápidamente y de intensidad débil; puede considerarse como en evento de corta duración que presentó las características generales de otros...
Tipo: Journal Contribution Palavras-chave: El Nino phenomena; Sea level; Buoys; Rain; Edge waves; Equatorial waves; Temperature; Sea level; Rain; Temperature.
Ano: 2007 URL: http://hdl.handle.net/1834/2337
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El tsunami de Chile 27-02-2010 y su comportamiento en las zonas: Costera e insular del Ecuador OceanDocs
Moreano, H.; Arreaga, P.; Nath, J..
La disponibilidad de mareogramas de varios puertos de la costa continental del Ecuador y Galápagos, hizo posible realizar su análisis y entender el comportamiento del tsunami del 27 de febrero de 2010 en la costa nacional y en el archipiélago. En general los mareógrafos de la zona costera reciben la cresta de la primera onda minutos después de la hora pronosticada para la bajamar, cerca de las 08H30R (hora local) de la mañana del día sábado 27, registrándose por lo menos tres ondas de amplitudes que variaron entre 20 y 70 cm. y períodos que alcanzaron las 2 horas para posteriormente registrar anormalidades con amplitudes y períodos mucho menores respondiendo probablemente a las características propias de cada puerto. En la caleta Aeolian de la Isla Baltra...
Tipo: Journal Contribution Palavras-chave: Tsunamis; Tidal waves; Sea level.
Ano: 2012 URL: http://hdl.handle.net/1834/4654
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Evidence for a differential sea level rise between hemispheres over the twentieth century ArchiMer
Woeppelmann, Guy; Marcos, Marta; Santamaria-gomez, Alvaro; Martin-miguez, Belen; Bouin, Marie-noelle; Gravelle, Mederic.
Tide gauge records are the primary source of sea level information over multidecadal to century timescales. A critical issue in using this type of data to determine global climate-related contributions to sea level change concerns the vertical motion of the land upon which the gauges are grounded. Here we use observations from the Global Positioning System for the correction of this vertical land motion. As a result, the spatial coherence in the rates of sea level change during the twentieth century is highlighted at the local and the regional scales, ultimately revealing a clearly distinct behavior between the Northern and the Southern Hemispheres with values of 2.0mm/yr and 1.1mm/yr, respectively. Our findings challenge the widely accepted value of...
Tipo: Text Palavras-chave: Sea level; Climate change; Land motion; Geodesy; Tide gauge; GPS.
Ano: 2014 URL: https://archimer.ifremer.fr/doc/00489/60025/63282.pdf
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Facteurs de contrôle sur le fonctionnement du système turbiditique du Rhône depuis le Dernier Maximum Glaciaire ArchiMer
Lombo Tombo, Swesslath.
Turbidite systems are accumulations of fluvial sediment on the continental margins. They are mainly made of « turbidites » deposited after the flow of turbidity currents inside submarine canyons and channels. Their structure and composition are controlled by global and regional environmental changes such as sea level and climate. The two fundamental parameters that govern their functioning are the production of sediment in the river watersheds and the capability and reactivity of the transfer to the turbidite system. In this work we show that for the last 24,000 years the functioning of the Rhone turbidite system has shown rapid changes under the control of sea level and sediment production fluctuations. Our results are based on a millennial time-scale...
Tipo: Text Palavras-chave: Hyperpycnite; Turbidites; Système turbiditique du Rhône; Facteurs de contrôle; Niveau marin; Climat; Morphologie; Golfe du Lion; Méditerranée occidentale; Hyperpycnites; Turbidites; Rhone turbidite system; Control factors; Sea level; Climate; Morphology; Gulf of Lions; Western Mediterranean.
Ano: 2015 URL: http://archimer.ifremer.fr/doc/00274/38505/37013.pdf
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Geomorphology of the Kenyan Coast: Not as a Result of Sea-Level Change Alone OceanDocs
Abuodha, P.A.W..
The coastal setting and the geology control the geomorphology on the Kenyan coast. The evolution of the physical environment has also been influenced by climate, wave and tidal regime, sedimentation and river discharge. The shore terraces of Kenyan coast correspond to eustatic movements of sea level. There seems to be evidence of a high water level during the late Pleistocene. For the lower terraces a Holocene age is suggested. During the Pleistocene, sea level fluctuations associated with glacial / interglacial phases left well developed raised platforms and beaches. The Kenyan coast has a strong tectonic influence and it is difficult to describe the coast in terms of emergence or submergence only. It can therefore be concluded that the geomorphology of...
Tipo: Report Palavras-chave: Geomorphology; Sea level.
Ano: 1993 URL: http://hdl.handle.net/1834/407
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IGOSS Plan and Implementation Programme, 1996-2003 OceanDocs
IOC.
Tipo: Book Palavras-chave: Oceanography; Sea level; Wave data; Data acquisition; Data converters; Data transmission; Buoys; Data collections; Data processing; Sea level; Data acquisition; Data processing; Http://aims.fao.org/aos/agrovoc/c_34115; Http://aims.fao.org/aos/agrovoc/c_37344; Http://aims.fao.org/aos/agrovoc/c_10289.
Ano: 1996 URL: http://hdl.handle.net/1834/2811
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Impact of relative sea level and rapid climate changes on the architecture and lithofacies of the Holocene Rhone subaqueous delta (Western Mediterranean Sea) ArchiMer
Fanget, Anne-sophie; Berne, Serge; Jouet, Gwenael; Bassetti, Maria-angela; Dennielou, Bernard; Maillet, Gregoire M.; Tondut, Mathieu.
The modern Rhone delta in the Gulf of Lions (NW Mediterranean) is a typical wave-dominated delta that developed after the stabilization of relative sea level following the last deglacial sea-level rise. Similar to most other deltas worldwide, it displays several stacked parasequences and lobes that reflect the complex interaction between accommodation, sediment supply and autogenic processes on the architecture of a wave-dominated delta. The interpretation of a large set of newly acquired very high-resolution seismic and sedimentological data, well constrained by 14C dates, provides a refined three-dimensional image of the detailed architecture (seismic bounding surfaces, sedimentary facies) of the Rhone subaqueous delta, and allows us to propose a...
Tipo: Text Palavras-chave: Delta; Holocene; Maximum Flooding Surface; Sea level; Tempestites; Western Mediterranean.
Ano: 2014 URL: http://archimer.ifremer.fr/doc/00179/29017/27445.pdf
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Importations et remaniements de thanatofaunes dans les sables de la plate-forme profonde des approches occidentales de la Manche ArchiMer
Reynaud, Jean-yves; Lauriat-rage, Agnès; Tessier, Bernadette; Neraudeau, Didier; Braccini, Eric; Carriol, René-pierre; Clet-pellerin, Martine; Moullade, Michel; Lericolais, Gilles.
Macro- and micro-faunas are reported from six gravity cores collected at a mean depth of 150 m in the surficial deposits of the Kaiser sand bank in the Southern Western Channel Approaches. These are bivalves (mainly), gastropods, echinids, crustaceans and foraminifers. These fauna present a very rich association of numerous, well preserved species from various ecological settings. Such an association is commonly reported from the continental shelf of the last transgressive cycle. In addition, the sediment comprises two imported faunal associations. The first one corresponds to thanatocaenoses of Pliocene/lowermost Pleistocene and Weichselian age, reworked respectively from the underlying celtic incised valley fills and the Celtic Sand Banks. The absence of...
Tipo: Text Palavras-chave: Continental shelf; Thanatofauna; Sea level; Reworking; Transport.
Ano: 1999 URL: http://archimer.ifremer.fr/doc/00146/25682/23843.pdf
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Influence of mesoscale atmospheric forcing on mean sea level at Piraquara, RJ OceanDocs
Uaissone, A.J.R..
The work refers to variations of the mean sea level (MSL) in Piraquara (RJ) due to mesoscale atmospheric disturbances in the South and Southeast Brazil oceanic area. The sea level data were submitted to a verification and consistence process, and then they were validated with the help of predicted levels by the software Pacmaré (FRANCO, 1992). For the pressure and wind velocities, the NCEP re-analysis data was used. Thompson's low pass optimizable filter was used to remove high frequencies in the data. Differently to the habitual use of quarters of year in climatologic studies, in this work partitions of the year centered in solstice and equinox were considered. About the results of the statistical analysis in the time domain, it was seen that MSL...
Tipo: Theses and Dissertations Palavras-chave: Sea level; Atmospheric disturbances; Dynamics.
Ano: 2004 URL: http://hdl.handle.net/1834/910
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International Global Oceanographic Data Archaeology and Rescue (GODAR) Review Conference, Silver Spring, MD, USA 12-15 July 1999. OceanDocs
The International Global Oceanographic Data Archaeology and Rescue (GODAR) Review Conference took place in Silver Spring, MD, USA from 12-15 July 1999. The Conference marked the end of the first phase of the GODAR project and was attended by more than 70 data managers and scientists. The Conference summed up the results of the first phase and provided guidance for future GODAR activities. Substantial amounts of additional historical data that still reside only in manuscript form have been identified by Member States as a result of the 6 regional GODAR meetings that have been held to date. The meeting concluded that the GODAR project should be continued and extended to possibly include additional variables such as sea level and ocean bathymetry.
Tipo: Report Palavras-chave: Sea level; Ocean bathymetry.
Ano: 2003 URL: http://hdl.handle.net/1834/5674
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Late Glacial to Preboreal sea-level rise recorded by the Rhone deltaic system (NW Mediterranean) ArchiMer
Berne, Serge; Jouet, Gwenael; Bassetti, Maria-angela; Dennielou, Bernard; Taviani, M.
A unique late Glacial-Preboreal record of changes in sea-level and sediment fluxes originating from the Alps is recorded in the Rhone subaqueous delta in the Western Mediterranean Sea. The compilation of detailed bathymetric charts, together with high-resolution seismic profiles and long cores, reveals the detailed architecture of several sediment lobes, related to periods of decreased sea-level rise and/or increased sediment flux. They are situated along the retreat path of the Rhone distributaries, from the shelf edge and canyon heads up to the modem coastline. They form transgressive backstepping parasequences across the shelf, the late Holocene (highstand) deltas being confined to the inner shelf The most prominent feature is an elongated...
Tipo: Text Palavras-chave: Western Mediterranean sea; Delta; Younger Dryas; Deglacial; Sea level.
Ano: 2007 URL: http://archimer.ifremer.fr/doc/2007/publication-3589.pdf
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Les surcotes et les décotes marines à Brest, étude statistique et évolution ArchiMer
Bouligand, R; Pirazzoli, Pa.
Sea surges (positive or negative) are short-period events (several hours to several days) among the most extreme oceanic phenomena resulting from climatic variability. A statistical study of hourly tide-gauge records at Brest does not allow any clear trend in long-term variations of these extreme sea levels to be detected. However, the frequency of extreme positive sea surges has increased recently (1953-1994), whereas extreme and sub-extreme negative sea surges has decreased. Such trends for the highest values strengthen the prevalence of positive sea surges over negative ones. The general evolution appears to be organised around several time scales, with a strong interannual variability superimposed on periods of amplification or regression of decennial...
Tipo: Text Palavras-chave: Niveau marin; Surcotes et décotes marines; Fréquence; Évolution; Brest; Sea level; Positive and negative sea surges; Frequency; Trend; Brest.
Ano: 1999 URL: http://archimer.ifremer.fr/doc/00325/43617/43918.pdf
Registros recuperados: 49
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