GLORIA

GEOMAR Library Ocean Research Information Access

X
Language
Preferred search index
Number of Hits per Page
Default Sort Criterion
Default Sort Ordering
Size of Search History
Default Email Address
Default Export Format
Default Export Encoding
Facet list arrangement
Maximum number of values per filter
Auto Completion
Topics (search only within journals and journal articles that belong to one or more of the selected topics)
Show more topics
Feed Format
Maximum Number of Items per Feed
Permalink If you want to be able to use settings permanently, you must save your settings and then set a Bookmark to the permalink
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
  • 2020-2024  (62)
  • 1985-1989  (15)
Document type
Keywords
Publisher
Years
Year
  • 1
    facet.materialart.
    Unknown
    An astronomically dated record of Earth's climate and its predictability over the last 66 million years (2021)
    AAAS
    Details
    Publication Date: 2023-10-26
    Description: Much of our understanding of Earth's past climate comes from the measurement of oxygen and carbon isotope variations in deep-sea benthic foraminifera. Yet, long intervals in existing records lack the temporal resolution and age control needed to thoroughly categorize climate states of the Cenozoic era and to study their dynamics. Here, we present a new, highly resolved, astronomically dated, continuous composite of benthic foraminifer isotope records developed in our laboratories. Four climate states-Hothouse, Warmhouse, Coolhouse, Icehouse-are identified on the basis of their distinctive response to astronomical forcing depending on greenhouse gas concentrations and polar ice sheet volume. Statistical analysis of the nonlinear behavior encoded in our record reveals the key role that polar ice volume plays in the predictability of Cenozoic climate dynamics.
    Description: Published
    Description: 1383–1387
    Description: 5A. Ricerche polari e paleoclima
    Description: JCR Journal
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    PAPER (OA)
  • 2
    Electronic Resource
    Electronic Resource
    Climatically forced organic carbon burial in equatorial Atlantic and Pacific Oceans (1988)
    [s.l.] : Nature Publishing Group
    Nature 335 (1988), S. 529-532 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Increased burial of organic carbon (Corg) may be due either to increased primary productivity and increased rain of organic matter out of the euphotic zone or to low-oxygen bottom waters inducing less degradation of the organic fraction after it has reached the sea floor. The weight of evidence ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/335529a0
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Authigenic magnetite formation in suboxic marine sediments (1987)
    [s.l.] : Nature Publishing Group
    Nature 326 (1987), S. 490-493 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Early diagenesis of iron in sediments occurs as a part of the progressive oxidation of organic matter through a sequence of microbially mediated metabolic reactions proceeding from O2, NO3, Mn, Fe and SO4 reduction to fermentation and CH4 production1'4. Suboxic marine sediments commonly show a near ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/326490a0
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    facet.materialart.
    Unknown
    An astronomically dated record of Earth’s climate and its predictability over the last 66 Million Years (2020)
    AAAS (American Association for the Advancement of Science)
    Details
    Publication Date: 2023-02-08
    Description: Much of our understanding of Earth’s past climate comes from the measurement of oxygen and carbon isotope variations in deep-sea benthic foraminifera. Yet, long intervals in existing records lack the temporal resolution and age control needed to thoroughly categorize climate states of the Cenozoic era and to study their dynamics. Here, we present a new, highly resolved, astronomically dated, continuous composite of benthic foraminifer isotope records developed in our laboratories. Four climate states—Hothouse, Warmhouse, Coolhouse, Icehouse—are identified on the basis of their distinctive response to astronomical forcing depending on greenhouse gas concentrations and polar ice sheet volume. Statistical analysis of the nonlinear behavior encoded in our record reveals the key role that polar ice volume plays in the predictability of Cenozoic climate dynamics.
    Type: Article , PeerReviewed
    Format: text
    Format: text
    Format: other
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 5
    facet.materialart.
    Unknown
    Climate, cryosphere and carbon cycle controls on Southeast Atlantic orbital-scale carbonate deposition since the Oligocene (30-0 Ma) (2020)
    PANGAEA
    Details
    Publication Date: 2024-07-19
    Description: These are the supplementary datasets for the manuscript: Drury, A.J., Liebrand, D., Westerhold, T., Beddow, H., Hodell, D., Rohlfs, N., Wilkens, R.H., Lourens, L., 'History of South Atlantic carbonate deposition since the Oligocene (30-0 Ma)', in final preparation for submission Climate of the Past
    Keywords: Carbonate; IODP; Miocene; Ocean Drilling; Ocean Drilling Program; ODP; ODP Site 1264; ODP Site 1265; Oligocene; Pleistocene; Pliocene; South Atlantic
    Type: dataset publication series
    Format: application/zip, 25 datasets
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    DATA PANGAEA
  • 6
    facet.materialart.
    Unknown
    Sedimentation at Manop Site H in the eastern equatorial Pacific (1988)
    PANGAEA
    In:  Supplement to: Finney, Bruce P; Lyle, Mitchell W; Heath, G Ross (1988): Sedimentation at Manop site H (eastern equatorial Pacific) over the past 400,000 years: climatically induced redox variations and their effects on transition metal cycling. Paleoceanography, 3(2), 169-189, https://doi.org/10.1029/PA003i002p00169
    Details
    Publication Date: 2024-07-19
    Description: Gravity cores recovered from Manganese Nodule Project site H (6°33'N, 92°49'W) show marked downcore variations in the abundance of calcium carbonate, organic carbon, opal, manganese, and other components deposited over the past 400,000 years. Variations in the downcore abundance of organic carbon, which ranges from 0.2 to 1.0%, can be used to hindcast redox conditions in the surface sediments over this time. The results indicate that the depth to the manganese redox boundary varied from about 5 to 25 cm below the seafloor during four major cycles. Downcore variations in solid phase Mn, Ni, and Cu can be produced by such changes in redox conditions. A model which predicts that solid phase Mn can be trapped and buried when the Mn redox boundary migrates rapidly upward is consistent with the observed organic carbon and Mn records and supports the reconstructed redox variations. The history of redox variations at site H can be explained by changes with time in surface water productivity. Major productivity variations at the site occur over 100-kyr cycles, with relatively higher productivity occurring during glacial stages. Thus Quaternary climate changes influence surface water productivity, redox conditions in sediments, and the cycling of transition metals.
    Keywords: GC; Gravity corer; MANOP; Pacific Ocean; Silicon Cycling in the World Ocean; SINOPS; VULCAN-1-38GC; VULCAN-1-49GC; VULCAN-1-70GC
    Type: dataset publication series
    Format: application/zip, 3 datasets
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    DATA PANGAEA
  • 7
    facet.materialart.
    Unknown
    Benthic isotopes of ODP Hole 130-807A (2024)
    PANGAEA
    Details
    Publication Date: 2024-07-19
    Description: This data file contains benthic foraminiferal oxygen isotope (δ¹⁸O) and carbon isotope (δ13C) records from ODP Site 807 A. Data from the depth intervals 0.17–8.37 mbsf and 26.27–42.37 mbsf were previously published in Zhang et al. (2007) and Du et al. (2016), respectively. Isotope measurements are based on the 〉150µm fraction of C. wuellerstorfi where available. If C. wuellerstorfi was not available, specimens of U. peregrina and C. mundulus were used for analysis. All stable isotopic analyses were performed at the State Key Laboratory of Marine Geology, Tongji University on Finnigan MAT 252 or 253 mass spectrometers. External reproducibility based on replicate analyses of benthic foraminiferal samples is 0.07‰ and 0.04‰ for δ18O and δ13C.Various benthic foraminiferal species fractionate oxygen and carbon isotopes differently when forming tests, resulting in offsets in δ18O and δ13C. To account for this, we adopted such conventional correction factors of C. wuellerstorfi and C. mundulus/Uvigerina peregerina that 0.64 ‰ was subtracted from the δ18O and 0.9 ‰ was added to the δ13C of Uvigerina peregerina (Duplessy et al., 1984; Shackleton, 1974).
    Keywords: 130-807A; AGE; Benthic isotopes; Depth, composite revised; DEPTH, sediment/rock; DRILL; Drilling/drill rig; Foraminifera; Foraminifera, benthic δ13C; Foraminifera, benthic δ18O; Joides Resolution; Leg130; Mass spectrometer, Finnigan, MAT 252; Mass spectrometer, Finnigan, MAT 253; Ocean Drilling Program; ODP; Ontong-Java Plateau; West equatorial Pacific Ocean
    Type: dataset
    Format: text/tab-separated-values, 5199 data points
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    DATA PANGAEA
  • 8
    facet.materialart.
    Unknown
    Chemical composition of a manganese nodule sample from the MN7601-PLEIADES campaign (R/V Melville) (2023)
    PANGAEA
    Details
    Publication Date: 2024-07-19
    Description: The authors have selected for analysis a manganese nodule from Station 20 of the PLEIADES Mn7601 campaign. This "apple" shaped nodule (6.5x3.0 cm) was laying on a bed of siliceous ooze (see illustrations). Successive thin layers of the nodule were carefully scraped from the surface of the measured area with a sharp surgical blade. All samples reduced to powder were air-dried at 110°C for at least two hours before analysis. The chemical composition of (1) the top 3-5 mm, (2) the bottom 3-5 mm, and (3) the bulk nodule from a section of Mn7601-20-2 adjacent to the portion used for the radiochemical studies was determined by atomic absorption and neutron activation analysis.
    Keywords: Aluminium; Antimony; Atomic absorption spectrophotometry; Barium; BC; Box corer; Calcium; Cerium; Cobalt; Copper; Deposit type; DEPTH, sediment/rock; DISTANCE; Elevation of event; Europium; Event label; Geochemistry; Hafnium; Holmium; Identification; Iron; Lanthanum; Latitude of event; Longitude of event; Lutetium; Manganese; manganese micronodule; manganese nodule; Melville; MN76-01, Pleiades; Neodymium; Neutron activation analysis; Nickel; NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS; ocean; Pacific Ocean; PLDS04MV-109BX; PLDS-4; Samarium; Sample type; Scandium; sediment; Silicon; Terbium; Thorium; Uranium; Ytterbium; Zinc
    Type: dataset
    Format: text/tab-separated-values, 81 data points
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    DATA PANGAEA
  • 9
    facet.materialart.
    Unknown
    Chemical composition of manganese crusts dredged near the Galapagos Rift (Pleiades Leg 2 cruise of R/V Melville) (2022)
    PANGAEA
    Details
    Publication Date: 2024-07-19
    Description: The samples analysed were dredged on Pleiades Leg II during a program of heat flow measurements, bottom photography and coring. They are located on topographic mounds in a band 20 km south of the Galapagos Rift on sediments ranging from 20 to 30 m in thickness. The dredge hauls were sampled to represent the diversity of dredged material either Mn encrusted altered basalt or relatively thick Mn coating deposited directly in contact with sediments. Each sample was analysed by atomic absorption spectrophotometry for major elemnts and instrumental neutron activation analysis for minor elements or rare earths.
    Keywords: Aluminium; Antimony; Arsenic; Atomic absorption spectrophotometry; Barium; Calcium; Cerium; Chromium; Cobalt; Copper; Deposit type; Dredge, pipe; DRG_P; Elevation of event; Europium; Event label; Geochemistry; Hafnium; Identification; Instrumental neutron activation analysis (INAA); Iron; Lanthanum; Latitude of event; Longitude of event; Lutetium; Magnesium; Manganese; manganese micronodule; manganese nodule; Melville; Minerals; Neodymium; Nickel; NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS; ocean; Pacific Ocean; PLDS02MV-003D; PLDS02MV-004D; PLDS02MV-005D; PLDS02MV-007D; PLDS-2; Pleiades; Potassium; Samarium; Scandium; sediment; Silicon; Sodium; Substrate type; Terbium; Thorium; Ytterbium; Zinc
    Type: dataset
    Format: text/tab-separated-values, 467 data points
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    DATA PANGAEA
  • 10
    facet.materialart.
    Unknown
    Biogenic barium flux in the eastern equatorial Pacific Ocean (2020)
    PANGAEA
    Details
    Publication Date: 2024-07-19
    Description: We present the first regional-scale records of biogenic Barium (xsBa) fluxes in the Panama basin of the eastern-equatorial margin of the Pacific Ocean in order to assess xsBa as a paleoproductivity proxy. Measurements of xsBa from thirteen cores that range in water depths from about 700 ¬¬to 3000 m show an increase in 230Th normalized xsBa mass accumulation rates (MARs) with increasing water depth during both Marine Oxygen Isotope Stages (MIS) 1 and 2. The correlation of xsBa MARs with depth are strong despite differences in bulk sediment mass accumulation rates and differing degrees of sediment redistribution. We interpret the increasing xsBa with water depth as likely due to the continued decomposition and remineralization of falling and/or resuspended biogenic particles. xsBa does not seem to be affected by diagenetic sulfate reduction in most of the cores. Calculated estimates of xsBa preservation in the sediment pile are high and fluctuate between 45% - 52% throughout the last 25 kyr. Although xsBa fluxes can be a robust indicator of paleoproductivity, caution is needed if a) there is evidence of sulfate reduction in sediments being analyzed, and b) one is trying to quantify differences in paleoproductivity among sites that are located at different depths in the water column.
    Keywords: 230Th; AGE; Aluminium; authigenic Uranium (Uauth); Barite dissolution; Barium; Barium excess; Biogenic Barium (xsBa); DEPTH, sediment/rock; Eastern Equatorial Pacific Ocean; Event label; Latitude of event; Longitude of event; Melville; MUC; MultiCorer; MV1014; MV1014-01-1MC; MV1014-01-7MC; MV1014-02-16MC; MV1014-02-9MC; paleoproductivity; Panama Basin
    Type: dataset
    Format: text/tab-separated-values, 124 data points
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    DATA PANGAEA
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...