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  • Data  (14)
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  • 1
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    Stable isotopes of Uvigerina spp. from sediment core M78/1_235-1 (2021)
    PANGAEA
    Details
    Publication Date: 2023-03-14
    Description: Stable carbon (δ13C) and oxygen isotope (δ18O) were performed on the benthic foraminiferal species Uvigerina spp. The foraminiferal specimens were selected from piston core M78/1-235-1, which was recovered from Tobago Basin (11°36.53'N 60°57.86'W) from 852 m water depth during R/V Meteor Cruise 78/1. Sampling and analytical studies were carried out from 412.5 to 800 cm core depth at 2-4 cm spatial resolution. This dataset extends the existing benthic proxy records (Poggemann et al., 2017; doi:10.1029/2018PA003376) further back in time, now focusing on the glacial time period and the latest fully developed D/O events (~22.7-37 ka BP). The isotope analyses were performed in 2017 and 2019 on a Thermo Scientific MAT 253 mass spectrometer with an automated Kiel IV Carbonate Preparation Device. The proxy data provide stratigraphical information on the Tobago Basin core M78/1-235-1.
    Keywords: 235-1; AGE; DEPTH, sediment/rock; M78/1; M78/1_235-1; Mass spectrometer, Finnigan, MAT 253; coupled with Carbonate preparation device, Finnigan, KIEL IV; Meteor (1986); N. Tobago; PC; Piston corer; Uvigerina spp., δ13C; Uvigerina spp., δ18O
    Type: Dataset
    Format: text/tab-separated-values, 810 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 2
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    Stable isotopes and Mg/Ca ratios of Globorotalia truncatulinoides from sediment core M78/1_235-1 (2020)
    PANGAEA
    Details
    Publication Date: 2023-03-30
    Description: Stable carbon (δ13C) and oxygen isotope (δ18O) and Mg/Ca-measurements were performed on the planktonic subsurface-dwelling foraminiferal species Globorotalia truncatulinoides. The foraminiferal specimens were selected from piston core M78/1-235-1, which was recovered from Tobago Basin (11°36.53'N 60°57.86'W) from 852 m water depth during R/V Meteor Cruise 78/1. Sampling and analytical studies were carried out from 630 to 800 cm core depth at 1-2 cm spatial resolution. This dataset extends the existing subsurface proxy records (Reißig et al., 2019; doi:10.1594/PANGAEA.897083) further back in time, now focusing on the time period of the latest fully developed D/O events (~30-37 ka BP). The isotope analyses were performed in 2019 on a Thermo Scientific MAT 253 mass spectrometer with an automated Kiel IV Carbonate Preparation Device. Trace metal analyses were performed on a VARIAN 720-ES Axial ICP-OES, a simultaneous, axial-viewing Inductively Coupled Plasma - Optical Emission Spectrometer coupled to a VARIAN SPS3 sample preparation system. The proxy data provide information on the Tobago Basin subsurface hydrography in relation to Western Boundary Current and North Atlantic Subtropical Gyre interdynamics.
    Keywords: 235-1; AGE; DEPTH, sediment/rock; Globorotalia truncatulinoides, Aluminium/Calcium ratio; Globorotalia truncatulinoides, Iron/Calcium ratio; Globorotalia truncatulinoides, Magnesium/Calcium ratio; Globorotalia truncatulinoides, Manganese/Calcium ratio; Globorotalia truncatulinoides, δ13C; Globorotalia truncatulinoides, δ18O; M78/1; M78/1_235-1; Mass spectrometer, Finnigan, MAT 253; coupled with Carbonate preparation device, Finnigan, KIEL IV; Meteor (1986); N. Tobago; PC; Piston corer; Reference of data; Sedimentation rate; Sub-surface temperature; δ18O, seawater, reconstructed
    Type: Dataset
    Format: text/tab-separated-values, 4588 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 3
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    Age and sediment reflectance of sediment core M78/1_235-1 (2021)
    PANGAEA
    Details
    Publication Date: 2023-03-03
    Description: This dataset provides depth, age, and sediment reflectance data of piston core M78/1-235-1, which was recovered from Tobago Basin (11°36.53'N 60°57.86'W) from 852 m water depth. A MINOLTA CM-508d hand-held spectrophotometer was used during R/V Meteor Cruise 78/1 to measure the light reflectance (L*) of the sediment. The spectral reflectance is measured over a wavelength spectrum from 400 to 700 nm at a 10 nm pitch. Routine measurements were made at 1 cm intervals and automatically recorded using the SPECTRAMAGIC® v.2.11 software. The L*- dataset without age information is archived at doi:10.1594/PANGAEA.788740 (Bahr et al., 2012). The L* data provide stratigraphical information, and information on fluvial supply of terrigenous matter to the core location.
    Keywords: 235-1; AGE; Color, L*, lightness; DEPTH, sediment/rock; M78/1; M78/1_235-1; Meteor (1986); N. Tobago; PC; Piston corer; Spectrophotometer Minolta CM-508d
    Type: Dataset
    Format: text/tab-separated-values, 757 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 4
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    Geochemistry (Mg/Ca and stable oxygen isotopes) of Globigerinoides ruber (pink variety) of sediment core M125-35-3 (2021)
    PANGAEA
    Details
    Publication Date: 2024-02-02
    Description: This dataset includes stable oxygen isotope (δ¹⁸O ‰ V-SMOW) data and reconstructed Sea Surface Temperatures (SST) based on foraminiferal Mg/Ca measured on Globigerenoides ruber (pink variety) covering the last deglacial period (20 to 10 ka). Raw Mg/Ca data were converted to SSTs using the species-specific calibration provided by Dekens et al. (2002; doi:10.1029/2001GC000200). Combined stable oxygen isotope data and Mg/Ca based SSTs were used to calculate ice-volume free seawater (δ¹⁸Oivf-sw). Foraminiferal species G. ruber (p) were sampled from sediment Gravity Core M125-35-3 retrieved during research cruise M125 (RV METEOR) in 2016. Core M125-35-3 is located off south western Brazil in the tropical western South Atlantic in the pathway of the tropical warm southward-flowing Brazil Current.
    Keywords: Age model; Calculated from Mg/Ca ratios (Dekens et al. 2002); Calculated from Mg/Ca ratios (this study); Calculated from Mg/Ca ratios and d18O and corrected for ice volume; DEPTH, sediment/rock; Foraminifera, planktic δ18O; GC; Globigerinoides ruber pink, Magnesium/Calcium ratio; Gravity corer; M125; M125_428-3; M125-35-3; Meteor (1986); Mg/Ca; SAMBA; Sea surface temperature; Sea surface temperature, annual mean; South Atlantic Ocean; stable oxygen isotopes; tropical western South Atlantic; δ18O, ice volume free, seawater
    Type: Dataset
    Format: text/tab-separated-values, 509 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 5
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    Alkenone and TEX86 data for MIS 6 to 5 on the Brazilian Margin (2023)
    PANGAEA
    Details
    Publication Date: 2024-02-05
    Description: We generated alkenone- and TEX86- based paleotemperature estimates for MIS 6-5 in core M125-55-7 (offshore Eastern Brazil) to text whether previously generated foraminiferal Mg/Ca SST are seasonaly biased. We find that alkenone and Mg/Ca-temperatures reflect annual mean SST with a transient winter bias of alkenone SST during MIS 5a-c. The winter-bias might relate to increased upwelling activity as indicated by higher abundances of G. bulloides. TEX86 temperatures (despite showing annual mean SST in core tops) deviate by up to 6°C to lower temperatures which we attribute to increased input of terrestrial GDGT during MIS 6 as indicated by an high BIT index and (ii) migration of the TEX86 producers to deeper levels within the water column following changes in vertical particle flux efficiency.
    Keywords: Alkenone; BIT index; foraminifera abundance; M125; M125_445-7; M125-55-7; Meteor (1986); PC; Piston corer; SAMBA; South Atlantic Ocean; TEX86
    Type: Dataset
    Format: application/zip, 3 datasets
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 6
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    Revised benthic isotope stratigraphy of sediment core M125-55-7 (2023)
    PANGAEA
    Details
    Publication Date: 2024-02-05
    Keywords: AGE; Alkenone; BIT index; DEPTH, sediment/rock; foraminifera abundance; M125; M125_445-7; M125-55-7; Meteor (1986); PC; Piston corer; SAMBA; South Atlantic Ocean; TEX86; Uvigerina sp., δ13C; Uvigerina sp., δ18O
    Type: Dataset
    Format: text/tab-separated-values, 634 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 7
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    Biomarker of sediment core M125-55-7 (2023)
    PANGAEA
    Details
    Publication Date: 2024-02-05
    Keywords: Accumulation rate, alkenone; AGE; Alkenone; Alkenones; BIT index; Branched and isoprenoid tetraether index; Calculated from TEX86, 0-200 m; Calculated from TEX86H; Calculated from UK'37; DEPTH, sediment/rock; Dry mass; foraminifera abundance; M125; M125_445-7; M125-55-7; Meteor (1986); PC; Piston corer; SAMBA; Sea surface temperature; South Atlantic Ocean; Temperature, water, interpolated; TEX86
    Type: Dataset
    Format: text/tab-separated-values, 1073 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 8
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    Planktic foraminifera of sediment core M125-55-7 (2023)
    PANGAEA
    Details
    Publication Date: 2024-02-05
    Keywords: Accumulation rate, Globigerina bulloides; Accumulation rate, Globigerinoides ruber pink; Accumulation rate, Globigerinoides ruber white; Accumulation rate, planktic foraminifera by mass; AGE; Alkenone; BIT index; Counting 250-315 µm fraction; DEPTH, sediment/rock; Dry mass; Foraminifera, planktic; Foraminifera, planktic, other; Foraminifera, planktic, total; foraminifera abundance; Globigerina bulloides; Globigerinoides ruber pink; Globigerinoides ruber white; M125; M125_445-7; M125-55-7; Meteor (1986); PC; Piston corer; SAMBA; Size fraction; South Atlantic Ocean; Split; TEX86
    Type: Dataset
    Format: text/tab-separated-values, 1088 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 9
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    Foraminiferal geochemistry of sediment core M125-35-3 (2022)
    PANGAEA
    Details
    Publication Date: 2024-04-25
    Keywords: AGE; deglacial variability; DEPTH, sediment/rock; Foraminiferal geochemistry; GC; Globigerinoides ruber pink, δ13C; Gravity corer; land-ocean teleconnection; M125; M125_428-3; M125-35-3; Meteor (1986); Organic Geochemistry; SAMBA; South American Monsoon System; South Atlantic Convergence Zone; South Atlantic Ocean; XRF data
    Type: Dataset
    Format: text/tab-separated-values, 141 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 10
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    XRF analysis of sediment core M125-35-3 (2022)
    PANGAEA
    Details
    Publication Date: 2024-04-25
    Keywords: Accumulation rate, aluminium; Accumulation rate, calcium; Accumulation rate, iron; Accumulation rate, potassium; Accumulation rate, titanium; AGE; Aluminium; Aluminium/Silicon ratio; Calcium; deglacial variability; DEPTH, sediment/rock; Foraminiferal geochemistry; GC; Gravity corer; Iron; land-ocean teleconnection; M125; M125_428-3; M125-35-3; Meteor (1986); Organic Geochemistry; Potassium; Potassium/Aluminium ratio; SAMBA; South American Monsoon System; South Atlantic Convergence Zone; South Atlantic Ocean; Titanium; XRF data
    Type: Dataset
    Format: text/tab-separated-values, 1056 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
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