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  • PANGAEA  (37)
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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
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  • 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
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  • 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
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  • 4
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    Planktonic Mg/Ca and stable oxygen isotope ratios for DSDP Hole 90-590B
    PANGAEA
    In:  Supplement to: Karas, Cyrus; Nürnberg, Dirk; Tiedemann, Ralf; Garbe-Schönberg, Dieter (2011): Pliocene climate change of the Southwest Pacific and the impact of ocean gateways. Earth and Planetary Science Letters, 301(1-2), 117-124, https://doi.org/10.1016/j.epsl.2010.10.028
    Details
    Publication Date: 2023-06-27
    Description: The transition from the early Pliocene "Warmhouse" towards the present "Icehouse" climate and the role of Gateway dynamics are intensively debated. Both, the constrictions of the Central American Seaway and the Indonesian Gateway affected ocean circulation and climate during the Pliocene epoch. Here, we use combined d18O and Mg/Ca ratios of planktonic foraminifera (marine protozoa) from surface and subsurface levels to reconstruct the thermal structure and changes in salinities from the Southwest Pacific Deep Sea Drilling Project (DSDP) Site 590B from 6.5 to 2.5 Ma. Our data suggest a gradual cooling of ~2 °C and freshening of the sea surface during ~4.6-4 Ma with an increased meridional temperature gradient between the West Pacific Warm Pool and the Southwest Pacific when the closing of the Central American Seaway reached a critical threshold. After ~ 3.5 Ma, the restricted Indonesian Gateway might have amplified the East Australian Current, allowing enhanced heat transport towards the Southwest Pacific with reduced meridional temperature gradients when the global climate gradually cooled. At the same time our data suggest a cooling and freshening of Subantarctic Mode Water (SAMW) or/and an increased northward flow of SAMW towards Site 590B, possibly a first step towards the present Antarctic Frontal System.
    Keywords: 90-590B; Deep Sea Drilling Project; DRILL; Drilling/drill rig; DSDP; Glomar Challenger; Leg90; South Pacific/Tasman Sea/CONT RISE
    Type: Dataset
    Format: application/zip, 2 datasets
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  • 5
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    Paleorecords from MD02-2575 (Figure 2) (2008)
    PANGAEA
    In:  Supplement to: Ziegler, Martin; Nürnberg, Dirk; Karas, Cyrus; Tiedemann, Ralf; Lourens, Lucas Joost (2008): Persistent summer expansion of the Atlantic Warm Pool during glacial abrupt cold events. Nature Geoscience, 1, 601-605, https://doi.org/10.1038/ngeo277
    Details
    Publication Date: 2023-06-27
    Description: Palaeoclimate records and numerical model simulations indicate that changes in tropical and subtropical sea surface temperatures and in the annual average position of the intertropical convergence zone are linked to high-latitude climate changes on millennial to glacial-interglacial timescales. It has recently been suggested that cooling in the high latitudes associated with abrupt climate-change events is evident primarily during the northern hemisphere winter, implying increased seasonality at these times. However, it is unclear whether such a seasonal bias also exists for the low latitudes. Here we analyse the Mg/Ca ratios of surface-dwelling foraminifera to reconstruct sea surface temperatures in the northeastern Gulf of Mexico for the past 300,000 years. We suggest that sea surface temperatures are controlled by the migration of the northern boundary of the Atlantic Warm Pool, and hence the position of the intertropical convergence zone during boreal summer, and are relatively insensitive to winter conditions. Our results suggest that summer Atlantic Warm Pool expansion is primarily affected by glacial-interglacial variability and low-latitude summer insolation. Because a clear signature of rapid climate-change events, such as the Younger Dryas cold event, is lacking in our record, we conclude that high-latitude events seem to influence only the winter Caribbean climate conditions, consistent with the hypothesis of extreme northern-hemisphere seasonality during abrupt cooling events.
    Keywords: AGE; Calculated; CALYPSO; Calypso Corer; DEPTH, sediment/rock; De Soto Canyon; Globigerinoides ruber white, Magnesium/Calcium ratio; Globigerinoides ruber white, δ18O; ICP-OES, Inductively coupled plasma - optical emission spectrometry; IMAGES; IMAGES IX - PAGE; International Marine Global Change Study; Marion Dufresne (1995); Mass spectrometer Finnigan MAT 252; MD022575; MD02-2575; MD127; Sea surface temperature, annual mean; Uvigerina peregrina, δ18O
    Type: Dataset
    Format: text/tab-separated-values, 2253 data points
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  • 6
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    (Appendix A1) Stable oxygen isotope ratios and Mg/Ca ratios of foraminifera from DSDP Hole 90-590B
    PANGAEA
    Details
    Publication Date: 2023-06-27
    Keywords: 90-590B; AGE; Deep Sea Drilling Project; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP; DSDP/ODP/IODP sample designation; Globigerinoides sacculifer, Magnesium/Calcium ratio; Globigerinoides sacculifer, δ18O; Globorotalia crassaformis, Magnesium/Calcium ratio; Globorotalia crassaformis, δ18O; Glomar Challenger; ICP-OES, Inductively coupled plasma - optical emission spectrometry; Leg90; Mass spectrometer Finnigan MAT 251 and Finnigan MAT 252; Sample code/label; South Pacific/Tasman Sea/CONT RISE; Uvigerina peregrina, δ18O
    Type: Dataset
    Format: text/tab-separated-values, 1352 data points
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  • 7
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    (Appendix A2) Sand size fraction of DSDP Hole 90-590B
    PANGAEA
    Details
    Publication Date: 2023-06-27
    Keywords: 90-590B; AGE; Deep Sea Drilling Project; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP; DSDP/ODP/IODP sample designation; Glomar Challenger; Grain size, sieving; Leg90; Sample code/label; Size fraction 〉 0.063 mm, sand; South Pacific/Tasman Sea/CONT RISE
    Type: Dataset
    Format: text/tab-separated-values, 634 data points
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  • 8
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    Compiled Mg/Ca data from PlioVAR (2023)
    PANGAEA
    Details
    Publication Date: 2023-12-18
    Keywords: 130-806A; 130-806B; 165-999A; 184-1143B; 184-1143C; 202-1241; 202-1241A; 202-1241B; 202-1241C; 22-214; 306-U1313B; 306-U1313C; Age; alkenone SST; benthic and planktonic foraminifers; Caribbean Sea; COMPCORE; Composite Core; d18O of planktic foraminifera; Date/Time of event; Depth, composite; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Event label; Exp306; Extracted from PlioVAR KM5c SST Database; Foraminifera, planktic, Magnesium/Calcium ratio; foraminifera oxygen isotopes; From literature; Glomar Challenger; Indian Ocean//RIDGE; Joides Resolution; Latitude of event; Leg130; Leg165; Leg184; Leg202; Leg22; Literature search; Longitude of event; Mg/Ca-based sea surface temperature; North Atlantic Climate 2; Northern Hemisphere glaciation; North Pacific Ocean; PAGES_PlioVAR; Pleistocene; Pliocene; PlioVAR - Pliocene climate variability over glacial-interglacial timescales; Reference/source; Sample code/label; Sea surface temperature; Site; South China Sea; Species, unique identification; Species, unique identification (Semantic URI); Species, unique identification (URI); Uniform resource locator/link to raw data file; Uniform resource locator/link to reference
    Type: Dataset
    Format: text/tab-separated-values, 26274 data points
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  • 9
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    Mg/Ca-temperatures of planktonic foraminifer Globigerinoides ruber white from ODP Hole 172-1058C (2013)
    PANGAEA
    Details
    Publication Date: 2024-01-09
    Keywords: 172-1058C; AGE; Blake Outer Ridge, North Atlantic Ocean; DEPTH, sediment/rock; DRILL; Drilling/drill rig; Globigerinoides ruber white, Magnesium/Calcium ratio; ICP-OES, Inductively coupled plasma - optical emission spectrometry; Joides Resolution; Leg172; Ocean Drilling Program; ODP; Sample code/label; Sea surface temperature; Size fraction
    Type: Dataset
    Format: text/tab-separated-values, 1448 data points
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  • 10
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    Computed δ¹⁸Oseawater and d18Oivf-sw (ice volume-free seawater) of ODP Hole 172-1058C, obtained on Globigerinoides ruber white (2013)
    PANGAEA
    Details
    Publication Date: 2024-01-09
    Keywords: 172-1058C; AGE; Blake Outer Ridge, North Atlantic Ocean; Calculated; DEPTH, sediment/rock; DRILL; Drilling/drill rig; Joides Resolution; Leg172; Ocean Drilling Program; ODP; Sample code/label; δ18O, water
    Type: Dataset
    Format: text/tab-separated-values, 945 data points
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