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  • Data  (188)
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  • 1
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    (Table 2) Age determination of sediment core TTR-451 (2006)
    PANGAEA
    In:  Supplement to: Stanford, Jennifer; Rohling, Eelco J; Hunter, Sally E; Roberts, Andrew P; Rasmussen, Sune Olander; Bard, Edouard; McManus, Jerry F; Fairbanks, Richard G (2006): Timing of meltwater pulse 1a and climate responses to meltwater injections. Paleoceanography, 21(4), PA4103, https://doi.org/10.1029/2006PA001340
    Details
    Publication Date: 2024-03-02
    Description: The temporal relationship between meltwater pulse 1a (mwp-1a) and the climate history of the last deglaciation remains a subject of debate. By combining the Greenland Ice Core Project d18O ice core record on the new Greenland ice core chronology 2005 timescale with the U/Th-dated Barbados coral record, we conclusively derive that mwp-1a did not coincide with the sharp Bølling warming but instead with the abrupt cooling of the Older Dryas. To evaluate whether there is a relationship between meltwater injections, North Atlantic Deep Water (NADW) formation, and climate change, we present a high-resolution record of NADW flow intensity from Eirik Drift through the last deglaciation. It indicates only a relatively minor 200-year weakening of NADW flow, coincident with mwp-1a. Our compilation of records also indicates that during Heinrich event 1 and the Younger Dryas there were no discernible sea level rises, and yet these periods were characterized by intense NADW slowdowns/shutdowns. Clearly, deepwater formation and climate are not simply controlled by the magnitude or rate of meltwater addition. Instead, our results emphasize that the location of meltwater pulses may be more important, with NADW formation being particularly sensitive to surface freshening in the Arctic/Nordic Seas.
    Keywords: Age, 14C calibrated, CALIB REV 5.0.1 (Stuiver & Reimer 2005); Age, 14C conventional; Age, dated; Age, dated material; Age, dated standard deviation; Age, maximum/old; Age, minimum/young; Calendar age; Core; CORE; DEPTH, sediment/rock; North Atlantic; Professor Logachev; TTR-13; TTR-451; Δ R
    Type: Dataset
    Format: text/tab-separated-values, 49 data points
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  • 2
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    (Table S1) Age determination of sediment core OCE326-GGC5 (2004)
    PANGAEA
    In:  Supplement to: McManus, Jerry F; Francois, Roger; Gherardi, Jeanne-Marie; Keigwin, Lloyd D; Brown Leger, Susan (2004): Collapse and rapid resumption of Atlantic meridional circulation linked to deglacial climate changes. Nature, 428(6985), 834-837, https://doi.org/10.1038/nature02494
    Details
    Publication Date: 2024-03-02
    Description: The Atlantic meridional overturning circulation is widely believed to affect climate. Changes in ocean circulation have been inferred from records of the deep water chemical composition derived from sedimentary nutrient proxies (Boyle and Keigwin, 1987, doi:10.1038/330035a0), but their impact on climate is difficult to assess because such reconstructions provide insufficient constraints on the rate of overturning (LeGrand and Wunsch, 1995, doi:10.1029/95PA01455). Here we report measurements of 231Pa/230Th, a kinematic proxy for the meridional overturning circulation, in a sediment core from the subtropical North Atlantic Ocean. We find that the meridional overturning was nearly, or completely, eliminated during the coldest deglacial interval in the North Atlantic region, beginning with the catastrophic iceberg discharge Heinrich event H1, 17,500 yr ago, and declined sharply but briefly into the Younger Dryas cold event, about 12,700 yr ago. Following these cold events, the 231Pa/230Th record indicates that rapid accelerations of the meridional overturning circulation were concurrent with the two strongest regional warming events during deglaciation. These results confirm the significance of variations in the rate of the Atlantic meridional overturning circulation for abrupt climate changes.
    Keywords: Age, 14C AMS; Age, 14C calibrated, CALIB 4.3 (Stuiver et al., 1998); Age, dated; Age, dated material; Age, dated standard deviation; Calendar age; DEPTH, sediment/rock; GC; GGC5; Gravity corer; North Atlantic; OCE326-GGC5
    Type: Dataset
    Format: text/tab-separated-values, 64 data points
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  • 3
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    (Table 2) Age determination from different sediment cores of the Juan de Fuca Ridge (2017)
    PANGAEA
    In:  Supplement to: Costa, K M; McManus, Jerry F; Boulahanis, B; Carbotte, S M; Winckler, Gisela; Huybers, Peter; Langmuir, Charles H (2016): Sedimentation, stratigraphy and physical properties of sediment on the Juan de Fuca Ridge. Marine Geology, 380, 163-173, https://doi.org/10.1016/j.margeo.2016.08.003
    Details
    Publication Date: 2024-03-02
    Description: Sedimentation near mid-ocean ridges may differ from pelagic sedimentation due to the influence of the ridges' rough topography on sediment deposition and transport. This study explores whether the near-ridge environment responds to glacial-interglacial changes in climate and oceanography. New benthic d18O, radiocarbon, multi-sensor track, and physical property (sedimentation rates, density, magnetic susceptibility) data for seven cores on the Juan de Fuca Ridge provide multiple records covering the past 700,000 years of oceanographic history of the Northeast Pacific Ocean. Systematic variations in sediment density and coarse fraction correspond to glacial-interglacial cycles identified in benthic d18O, and these observations may provide a framework for mapping the d18O chronostratigraphy via sediment density to other locations on the Juan de Fuca Ridge and beyond. Sedimentation rates generally range from 0.5 to 3 cm/kyr, with background pelagic sedimentation rates close to 1 cm/kyr. Variability in sedimentation rates close to the ridge likely reflects remobilization of sediment caused by the high relief of the ridge bathymetry. Sedimentation patterns primarily reflect divergence of sedimentation rates with distance from the ridge axis and glacial-interglacial variation in sedimentation that may reflect carbonate preservation cycles as well as preferential remobilization of fine material.
    Keywords: Age, 14C calibrated; Age, dated; Age, dated material; Age, dated standard deviation; AT26-19; AT26-19-05PC; AT26-19-09PC; AT26-19-12PC; AT26-19-38PC; Atlantis (1997); Calendar age; Calendar age, standard deviation; DEPTH, sediment/rock; Event label; Juan de Fuca Ridge, North Pacific Ocean; Latitude of event; Longitude of event; PC; Piston corer; Sample ID; see further details
    Type: Dataset
    Format: text/tab-separated-values, 24 data points
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  • 4
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    (Table 3) Minerals and components of sediments from DSDP Site 94-609_Site, North Atlantic (1992)
    PANGAEA
    Details
    Publication Date: 2024-03-02
    Keywords: 94-609_Site; Black ore; Carbonate, detritic/terrigenic; Chert; COMPCORE; Composite Core; Deep Sea Drilling Project; DEPTH, sediment/rock; DSDP; Feldspar; Glauconite; Glomar Challenger; Indeterminata; Leg94; Mafic minerals; Metamorphite; North Atlantic/FLANK; Point counting; Quartz; Siltstone; Total counts; Volcanic glass; Volcanite
    Type: Dataset
    Format: text/tab-separated-values, 375 data points
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  • 5
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    (Table 2) Sediment components and stable isotopic ratio of Neogloboquadrina pachyderma from DSDP Site 94-609_Site, North Altlantic (1992)
    PANGAEA
    Details
    Publication Date: 2024-03-02
    Keywords: 94-609_Site; Calcium carbonate; COMPCORE; Composite Core; Counting 〉150 µm fraction; Deep Sea Drilling Project; DEPTH, sediment/rock; DSDP; DSDP/ODP/IODP sample designation; Foraminifera, per unit sediment mass; Glomar Challenger; Leg94; Lithic grains; Mass spectrometer Finnigan MAT 251; Neogloboquadrina pachyderma sinistral, δ13C; Neogloboquadrina pachyderma sinistral, δ18O; Neogloboquadrina pachyderma sinistral/total foraminifera ratio; North Atlantic/FLANK; Sample code/label; Sample code/label 2
    Type: Dataset
    Format: text/tab-separated-values, 260 data points
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  • 6
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    (Table 1) Age determinations of North Atlantic Ocean sediments (1992)
    PANGAEA
    Details
    Publication Date: 2024-03-02
    Keywords: 94-609; Age, 14C milieu/reservoir corrected (-400 yr); Age, comment; Age, dated; Age, dated material; Age, dated standard deviation; Deep Sea Drilling Project; Depth, bottom/max; DEPTH, sediment/rock; Depth, top/min; DRILL; Drilling/drill rig; DSDP; Event label; Glomar Challenger; HU75-055; Leg94; North Atlantic/FLANK; PC; Piston corer; Reference of data; V23; V23-16; V23-81; Vema
    Type: Dataset
    Format: text/tab-separated-values, 238 data points
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  • 7
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    (Table 3) Concentrations and isotopic ratios of thorium and uranium in sediments at ODP Site 177-1090 (2008)
    PANGAEA
    Details
    Publication Date: 2024-03-02
    Keywords: 177-1090; AGE; Calculated; COMPCORE; Composite Core; Depth, bottom/max; DEPTH, sediment/rock; Depth, top/min; Joides Resolution; Leg177; Loss by dissolution; Method comment; Ocean Drilling Program; ODP; Sample mass; Sample type; Single-collector inductively-coupled-plasma mass spectrometry; South Atlantic Ocean; Thorium-232; Thorium-232, standard deviation; Thorium-232/Thorium-230, standard deviation; Thorium-232/Thorium-230 ratio; Uranium-234/Uranium-238 activity ratio; Uranium-234/Uranium-238 activity ratio, standard deviation; Uranium-238; Uranium-238, standard deviation
    Type: Dataset
    Format: text/tab-separated-values, 69 data points
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  • 8
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    (Table 3) Concentrations and isotopic ratios of thorium and uranium in sediments at ODP Site 177-1094 (2008)
    PANGAEA
    Details
    Publication Date: 2024-03-02
    Keywords: 177-1094; AGE; Calculated; COMPCORE; Composite Core; Depth, bottom/max; DEPTH, sediment/rock; Depth, top/min; Joides Resolution; Leg177; Loss by dissolution; Method comment; Ocean Drilling Program; ODP; Sample mass; Sample type; Single-collector inductively-coupled-plasma mass spectrometry; South Atlantic Ocean; Thorium-232; Thorium-232, standard deviation; Thorium-232/Thorium-230, standard deviation; Thorium-232/Thorium-230 ratio; Uranium-234/Uranium-238 activity ratio; Uranium-234/Uranium-238 activity ratio, standard deviation; Uranium-238; Uranium-238, standard deviation
    Type: Dataset
    Format: text/tab-separated-values, 118 data points
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  • 9
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    Geochemical measurements from Holocene of three cores from the North Atlantic (2009)
    PANGAEA
    Details
    Publication Date: 2024-03-02
    Keywords: AGE; Azores; CALYPSO; Calypso Corer; DEPTH, sediment/rock; Event label; IMAGES; IMAGES I; International Marine Global Change Study; Le Suroît; Marion Dufresne (1995); Mass spectrometer Finnigan MAT Element 2; MD101; MD952027; MD95-2027; MD952037; MD95-2037; Newfoundland Slope; North Atlantic; PALEOCINAT; PC; Piston corer; Protactinium-231; Protactinium-231/Thorium-230 excess, decay-corrected; Standard error; SU90-44; Thorium-230; Thorium-230, flux normalized
    Type: Dataset
    Format: text/tab-separated-values, 775 data points
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  • 10
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    (Table 3) Concentrations and isotopic ratios of thorium and uranium in sediments at ODP Site 115-716B (2008)
    PANGAEA
    Details
    Publication Date: 2024-03-02
    Keywords: 115-716B; AGE; Calculated; Depth, bottom/max; DEPTH, sediment/rock; Depth, top/min; DRILL; Drilling/drill rig; Joides Resolution; Lakshadweep Sea; Leg115; Loss by dissolution; Method comment; Ocean Drilling Program; ODP; Sample mass; Sample type; Single-collector inductively-coupled-plasma mass spectrometry; Thorium-232; Thorium-232, standard deviation; Thorium-232/Thorium-230, standard deviation; Thorium-232/Thorium-230 ratio; Uranium-234/Uranium-238 activity ratio; Uranium-234/Uranium-238 activity ratio, standard deviation; Uranium-238; Uranium-238, standard deviation
    Type: Dataset
    Format: text/tab-separated-values, 68 data points
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