Bibliografías temáticas / ODP Site 976

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Literatura académica sobre el tema "ODP Site 976"

Autor: Grafiati

Publicado: 10 de marzo de 2023

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Artículos de revistas sobre el tema "ODP Site 976"

Combourieu Nebout, N., O. Peyron, I. Dormoy, S. Desprat, C. Beaudouin, U. Kotthoff y F. Marret. "Rapid climatic variability in the west Mediterranean during the last 25 000 years from high resolution pollen data". Climate of the Past 5, n.º 3 (11 de septiembre de 2009): 503–21. http://dx.doi.org/10.5194/cp-5-503-2009.

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Abstract. High-temporal resolution pollen record from the Alboran Sea ODP Site 976, pollen-based quantitative climate reconstruction and biomisation show that changes of Mediterranean vegetation have been clearly modulated by short and long term variability during the last 25 000 years. The reliability of the quantitative climate reconstruction from marine pollen spectra has been tested using 22 marine core-top samples from the Mediterranean. The ODP Site 976 pollen record and climatic reconstruction confirm that Mediterranean environments have a rapid response to the climatic fluctuations during the last Termination. The western Mediterranean vegetation response appears nearly synchronous with North Atlantic variability during the last deglaciation as well as during the Holocene. High-resolution analyses of the ODP Site 976 pollen record show a cooling trend during the Bölling/Allerød period. In addition, this period is marked by two warm episodes bracketing a cooling event that represent the Bölling-Older Dryas-Allerød succession. During the Holocene, recurrent declines of the forest cover over the Alboran Sea borderlands indicate climate events that correlate well with several events of increased Mediterranean dryness observed on the continent and with Mediterranean Sea cooling episodes detected by alkenone-based sea surface temperature reconstructions. These events clearly reflect the response of the Mediterranean vegetation to the North Atlantic Holocene cold events.

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Combourieu Nebout, N., O. Peyron y I. Dormoy. "Rapid climatic variability in the west Mediterranean during the last 25 000 years from high resolution pollen data". Climate of the Past Discussions 5, n.º 1 (24 de febrero de 2009): 671–707. http://dx.doi.org/10.5194/cpd-5-671-2009.

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Abstract. High-temporal resolution pollen record of Alboran Sea ODP Site 976 and pollen-based quantitative climate reconstruction shows that changes of Mediterranean vegetation have been clearly modulated by short and long term variability during the last 25 000 years. The western Mediterranean vegetation response appears nearly synchronous with North Atlantic variability during the last deglaciation as well as during the Holocene. High-resolution analyses of the ODP 976 pollen record allows to separate the Bölling/Alleröd period in two warm episodes that surround a cooling representative of the climatic succession of the Bölling, Older Dryas and Alleröd. A cooling trend is observed from Bölling to Alleröd. The ODP pollen record confirms that Mediterranean environments show rapid responses to the climatic fluctuations during the last termination, in particular that of all the climate oscillations associated with the successive steps of the deglaciation in the North Atlantic have been observed in the west Mediterranean region. Recurrent Holocene declines of the forest cover on the Alboran Sea borderlands indicate repetitive climate events that correlate well with several events of increased Mediterranean dryness observed on the continent and with alkenone SST showing Mediterranean Sea cooling. These events reflect clearly the response of to Mediterranean vegetation to North Atlantic Holocene cold events.

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Bernasconi, Stefano M., Philip A. Meyers y Gerard O’Sullivan. "Early diagenesis in rapidly accumulating sediments on the Alboran slope, ODP site 976". Geo-Marine Letters 18, n.º 3 (septiembre de 1998): 209–14. http://dx.doi.org/10.1007/s003670050070.

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Joannin, Sébastien, Franck Bassinot, Nathalie Combourieu Nebout, Odile Peyron y Célia Beaudouin. "Vegetation response to obliquity and precession forcing during the Mid-Pleistocene Transition in Western Mediterranean region (ODP site 976)". Quaternary Science Reviews 30, n.º 3-4 (febrero de 2011): 280–97. http://dx.doi.org/10.1016/j.quascirev.2010.11.009.

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Baudin, François, Nathalie Combourieu-Nebout y Rainer Zahn. "Signatures of rapid climatic changes in organic matter records in the western Mediterranean Sea during the last glacial period". Bulletin de la Société Géologique de France 178, n.º 1 (1 de enero de 2007): 3–13. http://dx.doi.org/10.2113/gssgfbull.178.1.3.

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Abstract Records of calcium carbonate, organic matter (organic carbon content, palynology) and planktonic foraminiferal oxygen isotopes from ODP Site 976, Alboran Sea, are used to reconstruct the evolution of continental climates and oceanic productivity in the westernmost Mediterranean over the past 50,000 years. The records mimic the Greenland ice core records in that they display the Heinrich events and the rapid Dansgaard/Oeschger-type stadial-interstadial oscillations. Warm interstadials correlate with an expansion of deciduous forests on the adjacent continents and enhanced river runoff and organic matter flux from terrestrial sources. In contrast, cold stadials are characterized by an expansion of semi-desert vegetation, reduced river runoff and limited terrestrial organic matter flux. The organic carbon record displays a longer-term cyclicity that correlates with the North Atlantic ’Bond’ cooling cycles. The records enable the documentation of rapid changes of continental climates in the western Mediterranean borderlands that caused changes in river runoff and in oceanic productivity that were driven by rapid fluctuations of the Atlantic inflow into the Mediterranean Sea. The combined terrestrial-marine patterns demonstrate the close linking of western Mediterranean climate with the climatic evolution in the North Atlantic region.

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Sassoon, Dael, Vincent Lebreton, Nathalie Combourieu-Nebout, Odile Peyron y Marie-Hélène Moncel. "Palaeoenvironmental changes in the southwestern Mediterranean (ODP site 976, Alboran sea) during the MIS 12/11 transition and the MIS 11 interglacial and implications for hominin populations". Quaternary Science Reviews 304 (marzo de 2023): 108010. http://dx.doi.org/10.1016/j.quascirev.2023.108010.

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Konijnendijk, T. Y. M., M. Ziegler y L. J. Lourens. "Chronological constraints on Pleistocene sapropel depositions from high-resolution geochemical records of ODP Sites 967 and 968". Newsletters on Stratigraphy 47, n.º 3 (1 de septiembre de 2014): 263–82. http://dx.doi.org/10.1127/0078-0421/2014/0047.

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Marino, Maria, Angela Girone, Patrizia Maiorano, Rosalia Di Renzo, Alessandra Piscitelli y José-Abel Flores. "Calcareous plankton and the mid-Brunhes climate variability in the Alboran Sea (ODP Site 977)". Palaeogeography, Palaeoclimatology, Palaeoecology 508 (noviembre de 2018): 91–106. http://dx.doi.org/10.1016/j.palaeo.2018.07.023.

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Drury, Anna Joy, Thomas Westerhold, David Hodell y Ursula Röhl. "Reinforcing the North Atlantic backbone: revision and extension of the composite splice at ODP Site 982". Climate of the Past 14, n.º 3 (8 de marzo de 2018): 321–38. http://dx.doi.org/10.5194/cp-14-321-2018.

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Abstract. Ocean Drilling Program (ODP) Site 982 represents a key location for understanding the evolution of climate in the North Atlantic over the past 12 Ma. However, concerns exist about the validity and robustness of the underlying stratigraphy and astrochronology, which currently limits the adequacy of this site for high-resolution climate studies. To resolve this uncertainty, we verify and extend the early Pliocene to late Miocene shipboard composite splice at Site 982 using high-resolution XRF core scanning data and establish a robust high-resolution benthic foraminiferal stable isotope stratigraphy and astrochronology between 8.0 and 4.5 Ma. Splice revisions and verifications resulted in ∼ 11 m of gaps in the original Site 982 isotope stratigraphy, which were filled with 263 new isotope analyses. This new stratigraphy reveals previously unseen benthic δ18O excursions, particularly prior to 6.65 Ma. The benthic δ18O record displays distinct, asymmetric cycles between 7.7 and 6.65 Ma, confirming that high-latitude climate is a prevalent forcing during this interval. An intensification of the 41 kyr beat in both the benthic δ13C and δ18O is also observed ∼ 6.4 Ma, marking a strengthening in the cryosphere–carbon cycle coupling. A large ∼ 0.7 ‰ double excursion is revealed ∼ 6.4–6.3 Ma, which also marks the onset of an interval of average higher δ18O and large precession and obliquity-dominated δ18O excursions between 6.4 and 5.4 Ma, coincident with the culmination of the late Miocene cooling. The two largest benthic δ18O excursions ∼ 6.4–6.3 Ma and TG20/22 coincide with the coolest alkenone-derived sea surface temperature (SST) estimates from Site 982, suggesting a strong connection between the late Miocene global cooling, and deep-sea cooling and dynamic ice sheet expansion. The splice revisions and revised astrochronology resolve key stratigraphic issues that have hampered correlation between Site 982, the equatorial Atlantic and the Mediterranean. Comparisons of the revised Site 982 stratigraphy to high-resolution astronomically tuned benthic δ18O stratigraphies from ODP Site 926 (equatorial Atlantic) and Ain el Beida (north-western Morocco) show that prior inconsistencies in short-term excursions are now resolved. The identification of key new cycles at Site 982 further highlights the requirement for the current scheme for late Miocene marine isotope stages to be redefined. Our new integrated deep-sea benthic stable isotope stratigraphy and astrochronology from Site 982 will facilitate future high-resolution late Miocene to early Pliocene climate research.

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de Boer, Bas, Marit Peters y Lucas J. Lourens. "The transient impact of the African monsoon on Plio-Pleistocene Mediterranean sediments". Climate of the Past 17, n.º 1 (29 de enero de 2021): 331–44. http://dx.doi.org/10.5194/cp-17-331-2021.

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Abstract. Over the Plio-Pleistocene interval a strong linkage exists between northern African climate changes and the supply of dust over the surrounding oceans and continental runoff towards the Mediterranean Sea. Both these signatures in the sedimentary record are determined by orbital cycles influencing glacial variability on the one hand and northern African monsoon intensity on the other hand. In this paper, we use the intermediate-complexity model CLIMBER-2 to simulate African climate during the Plio-Pleistocene between 3.2 and 2.3 million years ago (Ma) and compare our simulations with existing and new climate reconstructions. The CLIMBER-2 model is externally forced with atmospheric CO2 concentrations, ice sheet topography, and orbital variations, all of which strongly influence climate during the Pliocene and Pleistocene. Our simulations indicate that the records of northern Africa climate oscillate in phase with climatic precession. For the Earth's obliquity cycle, the time lag between the 41 000-year component in insolation forcing and the climatic response increased after inception of Northern Hemisphere (NH) glaciation around 2.8 Ma. To test the outcome of our simulations, we have put emphasis on the comparison between the simulated runoff of grid boxes encompassing the Sahara desert and the Sahel region and the sedimentary records of marine sediment cores from ODP Site 659 (Atlantic Ocean) and ODP Site 967 (Mediterranean). In this study we will show for the first time an extended Ti∕Al record of Site 967 down to 3.2 Ma. This record strongly correlates with runoff in the Sahara and Sahel regions, whereas correlation with the dust record of Site 659 is moderate and slightly improves after NH ice sheet inception. We investigated the transient variability of the individual and combined contributions of the Sahel and Sahara regions and found significant transient behaviour overlapping the inception of NH ice sheets (2.8 Ma) and the Plio-Pleistocene transition (2.6 Ma). Prior to 2.8 Ma, a larger contribution from the Sahara region is required to explain the variability of Mediterranean dust input. After this transition, we found that a more equal contribution of the two regions is required, representing an increased influence of Sahel runoff and wet periods.

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Tesis sobre el tema "ODP Site 976"

Toti, Francesco. "A Mediterranean perspective on the Early-Middle Pleistocene transition with emphasis on marine isotope stage 19". Doctoral thesis, 2018. http://hdl.handle.net/2158/1124617.

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In this thesis, we discuss pollen and dinocysts data from the western and central Mediterranean to reconstruct vegetation and climate during the Early-Middle Pleistocene transition, with emphasis on MIS 19, i.e. the best analogue of the present interglacial.

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Capítulos de libros sobre el tema "ODP Site 976"

Śliwinska, Kasia K., Stefan Schouten y Karen Dybkjær. "Lower Eocene to Lower Miocene Stratigraphy and Palaeoenvironment of ODP Site 643A, Norwegian Sea". En Springer Geology, 143–47. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-04364-7_29.

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Bryant, William R., Richard H. Bennett, Patti J. Burkett y F. R. Rack. "Microfabric and Physical Properties Characteristics of a Consolidated Clay Section: ODP Site 697, Weddell Sea". En Frontiers in Sedimentary Geology, 73–92. New York, NY: Springer New York, 1991. http://dx.doi.org/10.1007/978-1-4612-4428-8_7.

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Kaminski, Michael A., Felix M. Gradstein, Robert M. Goll y Dennis Greig. "Biostratigraphy and Paleoecology of Deep-Water Agglutinated Foraminifera at ODP Site 643, Norwegian-Greenland Sea". En Paleoecology, Biostratigraphy, Paleoceanography and Taxonomy of Agglutinated Foraminifera, 345–86. Dordrecht: Springer Netherlands, 1990. http://dx.doi.org/10.1007/978-94-011-3350-0_14.

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Dupont, Lydie M. "Palynology of the Last 680,000 Years of ODP Site 658 (off NW-Africa):fluctuations in paleowind systems". En Paleoclimatology and Paleometeorology: Modern and Past Patterns of Global Atmospheric Transport, 779–94. Dordrecht: Springer Netherlands, 1989. http://dx.doi.org/10.1007/978-94-009-0995-3_32.

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Mudelsee, Manfred y Karl Stattegger. "Application of the Grassberger—Procaccia Algorithm to the δ18O Record from ODP Site 659: Selected Methodical Aspects". En Fractals and Dynamic Systems in Geoscience, 399–413. Berlin, Heidelberg: Springer Berlin Heidelberg, 1994. http://dx.doi.org/10.1007/978-3-662-07304-9_31.

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Schrader, Hans, Neil Swanberg, Anne Katrine Lycke, Matthias Paetzel, Tim Schrader y Thies Schrader. "Diatom-inferred productivity changes in the eastern equatorial Pacific: The Quaternary record of ODP Leg 111, Site 677". En Twelfth International Diatom Symposium, 137–51. Dordrecht: Springer Netherlands, 1993. http://dx.doi.org/10.1007/978-94-017-3622-0_16.

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Lamy, Frank y Jérome Kaiser. "Glacial to Holocene Paleoceanographic and Continental Paleoclimate Reconstructions Based on ODP Site 1233/GeoB 3313 Off Southern Chile". En Past Climate Variability in South America and Surrounding Regions, 129–56. Dordrecht: Springer Netherlands, 2009. http://dx.doi.org/10.1007/978-90-481-2672-9_6.

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Hervé, Allahissem. "Preventing violent extremism in cross-border villages in the Lake Chad Basin countries: A lesson in cross-border cooperation". En Managing Transnational UNESCO World Heritage sites in Africa, 115–20. Cham: Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-030-80910-2_10.

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AbstractThis article summary covers the activities carried out by the Youth Organization for Peace and Development (YOPD) in the cross-border villages of the Lake Chad basin. The YOPD is an organization governed by Chadian law which works particularly in the cross-border villages of the Lake Chad basin. Thus, the Youth Organization for Development and Peace promotes peace and peaceful cohabitation between young Chadians, Cameroonians, Nigerians and Nigeriens of different religious denominations living in cross-border villages located in the Lake Chad basin. The YOPD also offers literacy courses to stateless populations living in cross-border villages in these countries, who are unfortunately excluded from the traditional education system because they lack nationality and official papers. Finally, the OJDP offers vocational training to disadvantaged young people in order to enable them to take charge of themselves and not succumb to the temptation to join the Boko Haram group.

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Herrero-Bervera, Emilio y Gary Acton. "Absolute Paleointensities from an Intact Section of Oceanic Crust Cored at ODP/IODP Site 1256 in the Equatorial Pacific". En The Earth's Magnetic Interior, 181–93. Dordrecht: Springer Netherlands, 2011. http://dx.doi.org/10.1007/978-94-007-0323-0_13.

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Lehning, Lukas, Henry Schweigel y Niklas Creemers. "Open Public Data, Medienkompetenz und die Resilienz der Gemeinschaft vor Ort". En Resilienz, 67–82. Berlin, Heidelberg: Springer Berlin Heidelberg, 2022. http://dx.doi.org/10.1007/978-3-662-66057-7_4.

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ZusammenfassungÖffentliche Diskurse finden zunehmend in digitalen Medien statt. Häufig entfalten sie hier Dynamiken, die einer gemeinsamen Willensbildung, der Verlässlichkeit geteilter kommunikativer Praktiken und nicht zuletzt der Wahrheitsfindung abträglich sind. In der Folge leidet die Fähigkeit lokaler Gemeinschaften, gemeinsam Lösungen etwa für die Bewältigung von Krisen und disruptiven Entwicklungen zu finden. Diskursive Resilienz wird somit zu einem notwendigen Faktor von Gemeinschaftsresilienz. Der Beitrag diskutiert diese Zusammenhänge und zeigt auf, wie die Resilienz von Gemeinschaften – insbesondere mit Blick auf Fragen einer diskursiven Resilienz – gestärkt werden kann. Im Fokus stehen dabei partizipative Verfahren und innovative Maßnahmen auf Basis von Open Public Data (OPD). So adressiert dieses Kapitel die Potenziale und Herausforderungen, welche die Verfügbarkeit und Nutzung dieser Daten für lokale Kontexte bereithalten. Dabei betont der Beitrag Daten- und Medienkompetenz als Voraussetzungen für eine zielführende Verwendung von OPD zur Stärkung von Gemeinschaftsresilienz.

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Actas de conferencias sobre el tema "ODP Site 976"

Gruben, Gaute, Kenneth Macdonald, Svend T. Munkejord, Hans L. Skarsvåg y Stephane Dumoulin. "Pipeline Fracture Control Concepts for Norwegian Offshore Carbon Capture and Storage". En 2020 13th International Pipeline Conference. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/ipc2020-9766.

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Abstract The Northern Lights onshore terminal will initially receive CO2 transported by ship tankers from industrial source sites located in south-eastern Norway and transport CO2 via a 12 ¾” OD offshore pipeline for injection into the Johansen storage reservoir, located south of the Troll field. The CO2 injection pipeline will be laid from the shore terminal to a subsea wellhead structure from where the liquid CO2 will be injected into the reservoir. Presently, demonstrating arrest of longitudinal propagating shear fracture in CO2 transport pipelines is specifically addressed in two international guidelines, ISO 27913 and DNVGL-RP-F104. The study reported here aims to develop a robust fracture control methodology unique to the Northern Lights pipeline. To this end, the maximum loading in terms of saturation pressure is conservatively estimated from temperature and pressure scenarios from the planned pipeline route and applied in numerical simulations of the running-fracture phenomenon using the SINTEF coupled FE-CFD code. It is shown that, with the given pipe material, diameter, and loading conditions, the proposed wall thickness of 15.9 mm is sufficient to arrest a propagating crack. Furthermore, the Battelle TCM with ISO 27913 or DNVGL-RP-F104 arrest- and load pressure correction is shown to provide a good first estimate in pipe design, although the arrest pressure saturates for low Charpy energy toughness values, indicating limited accuracy in this study.

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Tajika, Hisakazu, Takahiro Sakimoto, Tsunehisa Handa, Satoshi Igi, Rinsei Ikeda y Joe Kondo. "Strain Capacity Investigation on Grade X70 High Strain Line Pipe With Girth Weld". En ASME 2018 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/pvp2018-85059.

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Recently high grade pipeline project have been planned in hostile environment like landslide in mountain area, liquefaction in reclaimed land or the frost heave in Polar Regions. Geohazards bring large scale ground deformation and effect on the varied pipeline to cause large deformation. Therefore, strain capacity is important for the pipeline and strain based design is also needed to keep gas transportation project in safe. High grade steel pipe for linepipe tends to have higher yield to tensile (Y/T) ratio and it has been investigated that the lower Y/T ratio of the material improves strain capacity in buckling and tensile limit state. In onshore pipeline project, pipe usually transported in 12 or 18m each and jointed in the field. Girth weld (GW) is indispensable so strength matching of girth weld towards pipe body is important. In this study strain capacity of Grade X70 high strain pipe with size of 36” OD and 23mm WT was investigated with two types of experiments. One was a pipe bending test with whole pipe. The length of the specimen was approximately 8m and GW was made in the middle of joint length. A fixed internal pressure was applied during the bending test. Actual pipe situation in work was simulated and both circumferential and longitudinal stress occurred in this test. The other test was curved wide plate (CWP) test. In both tests, test pipes were cut and welded using GTAW in the first two layers and GMAW for the subsequent passes. Welding wire of TG-S62 and MG-S58P were used for GTAW and GMAW respectively to achieve over-matching girth weld considering the pipe body strength. Elliptical EDM notch was installed in the GW HAZ as simulated weld defect. In pipe bending test, buckling occurred at the intrados at 300 mm apart from the GW. 2D average compressive strain at buckling was 3.59% and this high compressive strain was considered to derive from the high strain capacity of this pipes. After the buckling, deformation concentrated to the buckling wrinkle. Test pipe broke at 35.5 degrees of pipe end rotation and the location was in base metal at the extrados opposite to the buckling wrinkle. The HAZ notch opened and CTOD was 1.44 mm and the global strain in 2D length average strain was 7.8%. In CWP test, tensile strain simply got large and pipe finally broke at global strain of 9.6% and CTOD of 15 mm. The break location was the HAZ notch. There was a significant difference in CTOD growth in HAZ between two test types. Conditions and factors that effect to these differences are argued in this paper.

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