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  • 2020-2024  (19)
  • 2020  (19)
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  • 1
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    Radiocarbon dates of sediment core MD04-2829 (2020)
    PANGAEA
    Details
    Publication Date: 2023-03-02
    Keywords: Age, 14C AMS; Age, dated; Age, error; ALIENOR; Atlantic; Calypso Square Core System; CASQS; DEPTH, sediment/rock; Laboratory code/label; Marion Dufresne (1995); MD04-2829CQ; MD141; Northeast Atlantic; radiocarbon; Species
    Type: Dataset
    Format: text/tab-separated-values, 68 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 2
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    Sediment depth age-models, stable carbon isotope data, and radiocarbon data of Atlantic Ocean sediment cores (2020)
    PANGAEA
    Details
    Publication Date: 2023-01-30
    Description: Sediment depth age-models, stable carbon isotope data, and radiocarbon data are reported for a suite of sediment cores from Iberian- and Brazil Margins, in the Atlantic basin. The sediment sequences span the last deglaciation (~30,000 years to the present). Stable carbon isotopes were measured on the benthic foraminifer species Cibicidoides wuellerstorfi, in the Godwin Laboratory, University of Cambridge. Each measurement was run on 1-4 individuals with a combined mass of 50-180μg. Samples were reacted with orthophosphoric acid (100%) and analysed, in comparison with a reference gas, using a dual inlet Thermo MAT 253 mass spectrometer connected to a Kiel device. Radiocarbon dates were obtained on monospecific samples of planktonic foraminifera, Globigerinoides ruber (Brazil Margin) or Globigerina bulloides (Iberian Margin), and samples of mixed benthic foraminifera (excluding agglutinated species) picked from the 〉150μm size-fraction. Samples were graphitized in the Godwin Radiocarbon Laboratory at the University of Cambridge, using a standard hydrogen/iron catalyst reduction method. AMS-14C dates were subsequently measured at the 14Chrono Centre, Queens University Belfast. All dates are reported as 'conventional radiocarbon ages', without additional 'corrections' applied. Reservoir ages and radiocarbon ventilation ages are derived based on the sediment core chronologies, and reported as offsets between contemporary marine- and atmospheric radiocarbon ages (based on the 'Intcal13' atmospheric radiocarbon calibration curve).
    Keywords: Atlantic; radiocarbon; reservoir age; stable carbon isotopes
    Type: Dataset
    Format: application/zip, 4 datasets
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 3
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    Stable carbon isotope ratios of Cibicidoides wuellerstorfi of Atlantic Ocean sediment cores (2020)
    PANGAEA
    Details
    Publication Date: 2023-06-27
    Keywords: 90b; AGE; Atlantic; CALYPSO; Calypso Corer; Cibicidoides wuellerstorfi, δ13C; DEPTH, sediment/rock; Elevation of event; Event label; GC; Gravity corer; GS07-150-17/1GC-A; IMAGES V; KAL; Kasten corer; Latitude of event; Longitude of event; Marion Dufresne (1995); MD09-3256; MD09-3256Q; MD09-3257; MD114; MD173; MD99-2334; radiocarbon; reservoir age; RETRO-2; SHAK03-6K; SHAK05-3K; SHAK10-10K; SHAK14-4G; South Atlantic Ocean; stable carbon isotopes
    Type: Dataset
    Format: text/tab-separated-values, 414 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 4
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    14C Ages of Atlantic Ocean sediment cores (2020)
    PANGAEA
    Details
    Publication Date: 2023-06-27
    Keywords: 90b; Age, 14C AMS; Age, dated; Age, dated material; Age, dated standard error; Atlantic; Calculated; calculated, 1 sigma; Calendar age; Calendar age, standard error; CALYPSO; Calypso Corer; DEPTH, sediment/rock; Elevation of event; Event label; GC; Gravity corer; GS07-150-17/1GC-A; GS07-150-20/2A; IMAGES V; KAL; Kasten corer; Latitude of event; Longitude of event; Marion Dufresne (1995); MD09-3256; MD09-3256Q; MD09-3257; MD114; MD173; MD99-2334; radiocarbon; Reference/source; reservoir age; RETRO-2; SHAK03-6K; SHAK05-3K; SHAK06-4K; SHAK10-10K; SHAK14-4G; South Atlantic Ocean; stable carbon isotopes
    Type: Dataset
    Format: text/tab-separated-values, 1656 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 5
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    Age determination of Atlantic Ocean sediment cores (2020)
    PANGAEA
    Details
    Publication Date: 2023-06-27
    Keywords: 90b; AGE; Age, 14C calibrated; Age, error; Atlantic; calculated, 1 sigma; Calendar age; Calendar age, standard error; CALYPSO; Calypso Corer; DEPTH, sediment/rock; Elevation of event; Event label; GC; Gravity corer; GS07-150-17/1GC-A; GS07-150-20/2A; IMAGES V; KAL; Kasten corer; Latitude of event; Longitude of event; Marion Dufresne (1995); MD09-3256; MD09-3256Q; MD09-3257; MD114; MD173; MD99-2334; radiocarbon; reservoir age; Reservoir age; Reservoir age, standard error; RETRO-2; SHAK03-6K; SHAK10-10K; SHAK14-4G; South Atlantic Ocean; stable carbon isotopes
    Type: Dataset
    Format: text/tab-separated-values, 315 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 6
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    Age model of Atlantic Ocean sediment cores (2020)
    PANGAEA
    Details
    Publication Date: 2023-06-27
    Keywords: 90b; Age model; Atlantic; CALYPSO; Calypso Corer; Comment; DEPTH, sediment/rock; Elevation of event; Event label; GC; Gravity corer; GS07-150-17/1GC-A; GS07-150-20/2A; IMAGES V; KAL; Kasten corer; Longitude of event; Marion Dufresne (1995); MD09-3256; MD09-3256Q; MD09-3257; MD114; MD173; MD99-2334; radiocarbon; reservoir age; RETRO-2; SHAK03-6K; SHAK05-3K; SHAK06-4K; SHAK10-10K; South Atlantic Ocean; stable carbon isotopes
    Type: Dataset
    Format: text/tab-separated-values, 7609 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 7
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    Palaeoceanographic, sediment and pollen data from sediment core MD01-2444 on the Portuguese Margin, Marine Isotope Stage 3 (2020)
    PANGAEA
    Details
    Publication Date: 2023-11-11
    Description: The Portuguese Margin has been a prime location for investigating millennial-scale variability, where analyses of palaeoceanographic and terrestrial proxies from the same samples in marine sequences allow an in situ assessment of the relative timing of changes. Here, we investigate changes in ocean conditions and hydroclimate in the MIS 3 section of the interval 35-57 ka in core MD01-2444. Core location and study interval: Core MD01-2444 (37°33.68'N; 10°08.53'W; 2637 m water depth; 27.45 m in length) was recovered in 2001, using the CALYPSO Giant Piston corer aboard the French research vessel Marion Dufresne II. Here, we report data from the 9-13.67 m section in MD01-2444 (~35-57 ka).
    Keywords: Heinrich Stadials; Interstadials; MIS 3; Portuguese Margin
    Type: Dataset
    Format: application/zip, 9 datasets
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 8
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    Deep-water temperatures from the Southern Ocean during HS4 (2020)
    PANGAEA
    Details
    Publication Date: 2024-02-23
    Description: Foraminiferal magnesium to calcium ratios (Mg/Ca) are reported for two benthic species, drawn from down-core marine sediment samples obtained from the deep Southern Ocean. Samples of 4-10 individual benthic foraminifera, of the species Globobulimina affinis and/or Uvigerina sp., were oxidatively cleaned according to a standard protocol, involving clay/detrital material removal, methanol rinses, buffered oxidation of organic matter, weak acid leaching, and deionised water rinses, followed by visual inspection of the remaining calcite fragments. After dissolution, samples were analysed by inductively coupled plasma mass spectrometry (ICP-MS). The analytical internal reproducibility is better than 2%. The efficiency of cleaning to remove external contaminant phases was screened on the basis of Fe/Ca ratios, which here remain below 0.05 mmol/mol.
    Keywords: AGE; Calypso Square Core System; CASQS; deep convection; Deep water temperature; deep-water temperature; DEPTH, sediment/rock; IMAGES XV - Pachiderme; Inductively coupled plasma - mass spectrometry (ICP-MS); Marion Dufresne (1995); MD07-3076; MD07-3076Q; MD159; Melonis affinis, Magnesium/Calcium ratio; Mg/Ca; Southern Ocean; Uvigerina sp., Magnesium/Calcium ratio
    Type: Dataset
    Format: text/tab-separated-values, 176 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 9
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    Spline interpolated deep-water temperatures from the Southern Ocean during HS4 (2020)
    PANGAEA
    Details
    Publication Date: 2024-02-23
    Description: Spline interpolated benthic foraminifer Mg/Ca based deep-water temperatures from sediment core MD07-3076Q.
    Keywords: AGE; Calypso Square Core System; CASQS; deep convection; Deep water temperature; deep-water temperature; IMAGES XV - Pachiderme; interpolated; Marion Dufresne (1995); MD07-3076; MD07-3076Q; MD159; Mg/Ca; Southern Ocean
    Type: Dataset
    Format: text/tab-separated-values, 939 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 10
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    d18O of Globigerina bulloides from sediment core MD01-2444 on the Portuguese Margin, Marine Isotope Stage 3 (2020)
    PANGAEA
    Details
    Publication Date: 2024-03-18
    Description: Planktonic foraminifera (G. bulloides) oxygen isotopes: Measurements of foraminiferal stable isotopes were carried out in the Godwin Laboratory for Palaeoclimate Research (University of Cambridge), using a VG SIRA mass spectrometer. Analyses were made on samples consisting of 30 specimens of G. bulloides in the 300-355 mm size fraction, picked by M.J. Mleneck-Vautravers. Results are reported with reference to the international standard VPDB and the precision is better than ±0.08‰ for d18O. Age model: The age model was developed by aligning the abrupt transitions of d18O record of G. bulloides in core MD01-2444 to warming and cooling events in the NGRIP d18Oice record, presented on: (i) the GICC05 timescale [Svensson, A. et al. A 60,000 year Greenland stratigraphic ice core chronology. Clim. Past 4, 47–57 (2008)]; and (ii) the WD2014: modified timescale, whereby NGRIP GICC05 ice ages 31.2–67.2 ka are multiplied by 1.0063. [Buizert, C. et al. The WAIS Divide deep ice core WD2014 chronology – Part 1: Methane synchronization (68–31 ka BP) and the gas age–ice age difference. Clim. Past 11, 153-173 (2015)].
    Keywords: Age model; Age model, GICC05; Age model, WD2014; CALYPSO; Calypso Corer; DEPTH, sediment/rock; GEOSCIENCES, MARMARCORE; Globigerina bulloides, δ18O; Heinrich Stadials; Interstadials; Marion Dufresne (1995); Mass spectrometer VG SIRA; MD01-2444; MD123; MIS 3; Portuguese Margin
    Type: Dataset
    Format: text/tab-separated-values, 498 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
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