Consulta: subjectFacets:"Sea level changes"
Registros recuperados: 14
Data/hora: 01/06/2024 07:23:34

Paleo sea levels reconsidered from direct observation of paleoshoreline position during Glacial Maxima (for the last 500,000 yr)
Provedor de dados: 5
Autores: Rabineau, Marina; Berne, Serge; Olivet, Jean-louis; Aslanian, Daniel; Guillocheau, François; Joseph, Philippe.
The drastic climatic changes which characterise the cooling trend of the last few million years of Earth history led to variations in eustatic sea level that had tremendous impact on the geology and ecology of continental margins. Reconstructing a sea-level curve back in time is not an easy task. Observations of shoreline positions are always a local measurement of Relative Sea Level that needs to be corrected from the effect of tectonic and thermal subsidence, sediment loading, compaction and glacio-hydro isostasy. Extensive studies have been done for the last deglaciation and for the last 100,000 yr cycle. But very few studies deal with position of sea level during earlier cycles, simply because conditions are very rarely favourable for the preservation...
Tipo: Text
Palavras-chave: Mediterranean Sea; Gulf of Lions; Golfe du Lion; Subsidence; Glacial maxima; Climatic cycles; Shoreline position; Glacioeustatism; Sea level amplitudes; Sea level changes.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/publication-2253.pdf

High Resolution Altimetry Reveals New Characteristics of the December 2004 Indian Ocean Tsunami
Provedor de dados: 5
Autores: Ablain, Michaël; Dorandeu, Joël; Le Traon, Pierre-yves; Sladen, Anthony.
The Indian Ocean tsunami, which occurred on December 26, 2004, was the first to be clearly observed using satellite altimeters. The wave amplitude observed in deep-ocean by TOPEX and Jason-1 was close to 60 cm about 2 hours after the earthquake. Envisat crossed the tsunami wave 3h15 after the earthquake and measured a 35 cm wave. Even though it flew over the tsunami 7h20 after the earthquake, GFO still observed a wave close to 20 cm. To better extract the tsunami signal from altimeter measurements, a specific ocean variability mapping technique is used. This technique proves to be mandatory for discriminating tsunami waves from other ocean signals. Altimeter signals are then compared with those derived from the CEA (Commissariat à l'Energie Atomique) model...
Tipo: Text
Palavras-chave: Wave analysis; Tsunamis; Earthquakes; Sea level changes; Satellite altimetry.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/publication-1174.pdf

Performance of modern tide gauges: towards mm-level accuracy
Provedor de dados: 5
Autores: Martin Miguez, Belen; Testut, Laurent; Woeppelmann, Guy.
Considerable efforts are being made worldwide to upgrade tide gauge networks using new technologies. Because of the unique location of the Kerguelen Islands, the measurement of sea level there has received particular attention, with up to four systems equipped with modern sensors functioning simultaneously (two pressure tide gauges, a radar tide gauge, and a GPS-equipped buoy). We analysed and compared the sea level data obtained with these systems from 2003 to 2010, together with a time series of tide pole observations. This is the first time that a multi-comparison study with tide gauges has been undertaken over such a long time span and that the stability of modern radar tide gauges has been examined. The multi-comparison enabled us to evaluate the...
Tipo: Text
Palavras-chave: Radar; Pressure gauges; Sea level changes; Sea level measurement; Tide gauges; Kerguelen Islands; GPS buoy.
Ano: 2012
URL: https://archimer.ifremer.fr/doc/00140/25137/23247.pdf

High frequency sea level fluctuations recorded in the Black Sea since the LGM
Provedor de dados: 5
Autores: Lericolais, Gilles; Bulois, C.; Gillet, Herve; Guichard, F.
This paper presents a 3D geometric interpretation of very high resolution seismic Chirp profiles acquired on the Romanian shelf during ASSEMBLAGE European Project. The results provide a solid record of the Black Sea Last Glacial Maximum (LGM) water level fluctuations. This pseudo-3D seismic interpretation shows that the Black Sea lacustrine shelf deposits form a significant basinward-prograding wedge system. on top of these prograding sequences is a set of sand dunes that delineates a wave cut-terrace like feature around the isobath -100 m. Landward of this dune field are small depressions containing barkhan-like bodies. The upper part of the last prograding sequence is incised by anastomosed channels which end in the Danube (Viteaz) canyon which are also...
Tipo: Text
Palavras-chave: Black Sea; Enclosed basin; Forced regression; Rapid transgression; Sea level changes.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2009/publication-6587.pdf

Environmental significance of microbialites in reef environments during the last deglaciation
Provedor de dados: 5
Autores: Camoin, G; Cabioch, G; Eisenhauer, A; Braga, J; Hamelin, B; Lericolais, Gilles.
In situ microbialites occurring in reef rocks dredged between 80 and 130 in water depth on the modern fore-reef slopes of Tahiti and the Marquesas islands yield ages ranging from 17,100 2900 to 4410 2250 years BP, suggesting that they played a prominent role during the last deglacial sea level rise.   Microbialites developed in both shallow and deep water depositional environments where they characterize various zones of the reef tracts (reef crests, upper reef slopes, deep fore-reef slopes), reflecting contrasting scenarios of microbialite development involving ''reefal microbialites'' in shallow-water settings and ''slope microbialites'' that formed in environments deeper than 1020 in and extending down to more than 100 m.   Reefal microbialites...
Tipo: Text
Palavras-chave: Sea level changes; Nutrients; French polynesia; Holocene; Last deglaciation; Microbialites; Coral reefs.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/publication-4204.pdf

The co-evolution of Black Sea level and composition through the last deglaciation and its paleoclimatic significance
Provedor de dados: 5
Autores: Major, Candace O.; Goldstein, Steven L.; Ryan, William B.f.; Lericolais, Gilles; Piotrowski, Alexander M.; Hajdas, Irka.
The Black Sea was an inland lake during the last ice age and its sediments are an excellent potential source of information on Eurasian climate change, showing linkages between regionally and globally recognized millennial-scale climate events of the last deglaciation. Here, we detail changes from the last glacial maximum (LGM) through the transition to an anoxic marginal sea using isotopic (strontium and oxygen) and trace element (Sr/Ca) ratios in carbonate shells, which record changing input sources and hydrologic conditions in the basin and surrounding region. Sr isotope records show two prominent peaks between similar to 18 and 16 ka BP cal, reflecting anomalous sedimentation associated with meltwater from disintegrating Eurasian ice sheets that...
Tipo: Text
Palavras-chave: Sea level changes; Black Sea; Deglaciation; Glaciation; Palaeoclimate; Palaeoceanography.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/publication-2006.pdf

About the malacological subdivision of Curaçao; a review
Provedor de dados: 16
Autores: Wagenaar Hummelinck, P.
Burrington Baker (1924) states that Curaçao can be divided into three distinct faunal areas. Stock (1977) mentions the occurrence of three subspecies of hadziid amphipods almost exclusively confined to different parts of Curaçao. The results of a study of the distribution on this island of various subspecies of the gastropods Cerion uva, Brachypodella raveni, Tudora megacheilos and T. rupis, however, do not support the hypothesis of a tripartite Curaçao.
Tipo: Article / Letter to the editor
Palavras-chave: Curaçao; Sea level changes; Land mollusks; Cerion; Brachypodella; Tudora.
Ano: 1990
URL: http://www.repository.naturalis.nl/record/504426

Geomorfología y dinámica costera
Provedor de dados: 20
Autores: Codignotto, J.
In Argentine coastal areas, geomorphological changes are directly related to relative continental uplifts and falls and to seaward and landward displacement of the coastline. Accretional and erosional phenomena are produced by displacement of the coastline in horizontal way. The resultant structures can be represented in two principal sectors. Backward motion or retrogradation of about 15 km were estimated for the Strait of Magellan, over an area of 500 km 2.Otherwise, large accretional phenomena were recognized in the north,with a 60 km seaward displacement, equivalent to 4,000 km2 in the last7.000 years. Variation in tidal regime and amplitude is reflected in the coincidence of the boundary between accretion and erosional sectors. Two principal nearshore...
Tipo: Book Section
Palavras-chave: Coastal morphology; Coastal erosion; Sea level changes; Coastal erosion; Http://aims.fao.org/aos/agrovoc/c_9949.
Ano: 1997
URL: http://hdl.handle.net/1834/1721

Propagación de la onda de marea en canales adyacentes a Campos de Hielo Sur
Provedor de dados: 20
Autores: Fierro, J.; Castillo, M.; Valenzuela, C.
During the research cruise Cimar-Fiordo 2, carried out in late 1996, sea level was recorded in three stations located in channels, Messier (Puerto Edén), Wide (Punta Beresford) and Concepción (Caleta Patria). The measurements were of short term, starting in October 20th  and finishing in December 13th, 1996. The sea level in those stations, was analyzed in the time and frequency dominion, and some tide non harmonic values were calculated. Results showed that tides evident influence in sea level signal, with a clear mixt semidiurnal behavior, and a daily inequality between high and low waters. The highest tide range was observed in puerto Edén, showing the effect of the local orography configuration while the wave propagates into the channel, and...
Tipo: Journal Contribution
Palavras-chave: Tides; Harmonic analysis; Spectral analysis; Sea level; Cruises; Sea level changes; Monitoring systems; Tidal dynamics; Tidal waves; Ice fields; Tides; Spectral analysis; Sea level; Http://aims.fao.org/aos/agrovoc/c_7764; Http://aims.fao.org/aos/agrovoc/c_28964; Http://aims.fao.org/aos/agrovoc/c_34115.
Ano: 2003
URL: http://hdl.handle.net/1834/1579

Respuesta del Nivel del Mar al Forzamiento Atmosférico en las Costasdel Golfo de México.
Provedor de dados: 20
Autores: Ramírez Stout, O.; Candela Pérez, J.
The subinertial response of sea level to meteorological forcing in the Gulf of Mexico is examined using observations of sea level, atmospheric pressure and surface wind covering the period 1985-1986. Spectral analysis and multiple regression in the frequency domain methods are employed for data processing. The analysis shows that the atmospheric pressure is the principal forcing agent. The response of sea level to atmospheric pressure is found to be non isostatic and dependent on frequency and geographical location; the response is overisostatic in the north zone and underisostatic in the south zone of the Gulf, approaching isostasy only at stations located in the Cuban coast. The importance of local and remote wind in sea level variability are determined;...
Tipo: Journal Contribution
Palavras-chave: Sea level; Sea level changes; Sea level; Http://aims.fao.org/aos/agrovoc/c_34115.
Ano: 2003
URL: http://hdl.handle.net/1834/3333

Time series of ocean measurements. Volume 2 - 1984
Provedor de dados: 20
Tipo: Book
Palavras-chave: Oceanography; Oceanographic data; Oceanography; Oceanographic surveys; Time series analysis; Sea level measurement; Sea level changes; Seasonal variations; Time series analysis; Oceanography; Http://aims.fao.org/aos/agrovoc/c_28778; Http://aims.fao.org/aos/agrovoc/c_12889.
Ano: 1985
URL: http://hdl.handle.net/1834/2737

Manual on Sea Level Measurement and Interpretation
Provedor de dados: 20
This manual is concerned primarily with techniques for the measurement of what are called relative sea level changes which means changes relative to the level of the land upon which the measuring instrument (the tide gauge) is located. The subject of changes in the level of land itself is reviewed later in this document but is given more detailed presentation in other reports to which we refer. The manual also concerns itself primarily with the part of the frequency spectrum of sea level change from minutes through to centuries by means of in situ devices at the coast (tide gauges). Such changes are sometimes called still water level changes, being changes over a period long enough to average over wind waves. The devices employed to make these measurements...
Tipo: Book
Palavras-chave: Oceanography; Sea level measurement; Sea level changes; Tide gauges; Acoustic data; Acoustic transducers; Acoustic current meters; Transducers.
Ano: 2002
URL: http://hdl.handle.net/1834/2685

IOC-UNEP-WMO-SAREC Planning Workshop on an Integrated Approach to Coastal Erosion, Sea-Level Changes and their Impacts
Provedor de dados: 20
Tipo: Report
Palavras-chave: Coastal erosion; Sea level changes.
Ano: 1994
URL: http://hdl.handle.net/1834/899

Holocene evolution of relative sea level and local mean high water spring tides in Belgium: a first assessment
Provedor de dados: 27
Autores: Denys, L.; Baeteman, C.
Holocene age-depth data from the Belgian coastal plain, basal peat data particularly, are assessed in terms of local water and tide levels. Basal peat formation was generally induced by sea-level rise; effects of local seepage were limited and significant river-gradient effects were absent. No relation was found between the timing of basal peat inception and substrate permeability. In general, edaphic (moisture) conditions were unfavourable for organic accumulation prior to sea-level related rise of the groundwater table. Error envelopes for the minimum level of local mean high water spring tides and for upper and extreme lower relative mean sea-level limits during the last 9400 solar years (8400 yrs B.P.) are presented. These indicate that the rate of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Holocene; Marine geology; Peat; Sea level changes; Sedimentation.
Ano: 1995
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=2960