Wharton, Jack; Renoult, Martin; Gebbie, Geoffrey; Keigwin, Lloyd D; Marchitto, Thomas M; Maslin, Mark; Oppo, Delia W; Thornalley, David J R (2024): Vertical δ18O profiles from Cape Hatteras and Blake Outer Ridge during the Mid-Holocene (2-6 ka BP) and LGM (19-23 ka BP) [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.967463, In: Wharton, J et al. (2024): Benthic foraminiferal oxygen isotope data (δ18O) and age models from Northwest Atlantic sediment cores forming depth transects at Blake Outer Ridge and Cape Hatteras [dataset bundled publication]. PANGAEA, https://doi.org/10.1594/PANGAEA.967462
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Abstract:
This dataset consists of glacial and Mid-Holocene multi-species benthic δ18O mean data from cores that form depth transects at Cape Hatteras and Blake Outer Ridge. The mean δ18O for each core was derived by averaging multiple monospecific measurements from different depth intervals corresponding to the MH or LGM. The standard error is σ/√n; where σ is the multi-species replicate error at either CH or BOR across both time periods, and n is the number of species analysed at each core. Stable isotope measurements were performed using a VG Isogas SIRA mass spectrometer with Multicarb preparation system (>80 μg) and a Thermo MAT253 isotope ratio mass spectrometer with Kiel IV carbonate preparation device (<80 μg) at the Godwin Laboratory, University of Cambridge. δ18O and δ13C are reported relative to the Vienna Peedee belemnite (VPDB) standard, and for both instruments analytical precision is estimated to be better than ±0.07 ‰ and ±0.04 ‰ respectively. Where foraminiferal abundances were low and/or bulk sediment was scarce or unavailable, we also supplemented our data with published δ18O data. This file also contains glacial sortable silt mean grain size data for a limited number of cores from both transects. Samples were processed using established methods (McCave et al., 1995) and analyzed at University College London on a Beckman Coulter Multisizer using the Enhanced Performance Multisizer 4 beaker and stirrer to ensure full sediment suspension. Two or three separate aliquots were analyzed for each sample, sizing 70,000 particles per aliquot. Full procedural error based on replicates starting from newly sampled bulk sediment was ±0.32 μm (n=10). Glacial mean sortable silt values were calculated by averaging data from sediments corresponding to between 19 and 23 ka BP. The standard error is σ/√n; where σ is the standard deviation of glacial measurements for each core, and n is the number of glacial measurements for each core.
Keyword(s):
Related to:
Henry, L Gene; McManus, Jerry F; Curry, William B; Roberts, Natalie L; Piotrowski, Alexander M; Keigwin, Lloyd D (2016): North Atlantic ocean circulation and abrupt climate change during the last glaciation. Science, 353(6298), 470-474, https://doi.org/10.1126/science.aaf5529
Keigwin, Lloyd D (2004): Radiocarbon and stable isotope constraints on Last Glacial Maximum and Younger Dryas ventilation in the western North Atlantic. Paleoceanography, 19(4), PA4012, https://doi.org/10.1029/2004PA001029
Keigwin, Lloyd D; Swift, Stephen A (2017): Carbon isotope evidence for a northern source of deep water in the glacial western North Atlantic. Proceedings of the National Academy of Sciences, 114(11), 2831-2835, https://doi.org/10.1073/pnas.1614693114
Project(s):
Funding:
Horizon 2020 (H2020), grant/award no. 678760: A Trans-Atlantic assessment and deep-water ecosystem-based spatial management plan for Europe
Horizon 2020 (H2020), grant/award no. 818123: Integrated Assessment of Atlantic Marine Ecosystems in Space and Time
National Science Foundation (NSF), grant/award no. OCE-1304291: Holocene reconstructions of Iceland-Scotland Overflow and the Deep Western Boundary Current
Natural Environment Research Council (NERC), grant/award no. NE/L002485/1: The London NERC Doctoral Training Partnership
Coverage:
Median Latitude: 34.431793 * Median Longitude: -72.154773 * South-bound Latitude: 29.080000 * West-bound Longitude: -76.407000 * North-bound Latitude: 39.280000 * East-bound Longitude: -48.540000
Date/Time Start: 1993-11-03T00:00:00 * Date/Time End: 2019-09-02T00:00:00
Minimum ELEVATION: -5011 m a.s.l. * Maximum ELEVATION: -665 m a.s.l.
Event(s):
172-1054 * Latitude: 32.999722 * Longitude: -76.300000 * Date/Time: 1997-02-19T00:00:00 * Elevation: -1293.2 m * Penetration: 405.1 m * Recovery: 393.4 m * Location: Carolina Slope, North Atlantic Ocean * Campaign: Leg172 * Basis: Joides Resolution * Method/Device: Composite Core (COMPCORE) * Comment: 47 cores; 405.1 m cored; 0 m drilled; 97.1% recovery
172-1055 * Latitude: 32.784333 * Longitude: -76.286278 * Date/Time: 1997-02-21T00:00:00 * Elevation: -1798.1 m * Penetration: 405.4 m * Recovery: 429.4 m * Location: Carolina Slope, North Atlantic Ocean * Campaign: Leg172 * Basis: Joides Resolution * Method/Device: Composite Core (COMPCORE) * Comment: 45 cores; 405.4 m cored; 0 m drilled; 105.9% recovery
172-1057 * Latitude: 32.028861 * Longitude: -76.079222 * Date/Time: 1997-02-25T00:00:00 * Elevation: -2583.8 m * Penetration: 341.2 m * Recovery: 364.2 m * Location: Carolina Slope, North Atlantic Ocean * Campaign: Leg172 * Basis: Joides Resolution * Method/Device: Composite Core (COMPCORE) * Comment: 37 cores; 341.2 m cored; 0 m drilled; 106.7% recovery
Comment:
Isotopic ratios were measured either with a VG Isogas SIRA mass spectrometer with Multicarb preparation system (>80 μg) or with a Thermo MAT253 isotope ratio mass spectrometer with Kiel IV carbonate preparation device (<80 μg).
Parameter(s):
# | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
---|---|---|---|---|---|---|
1 | Event label | Event | Wharton, Jack | |||
2 | Latitude of event | Latitude | Wharton, Jack | |||
3 | Longitude of event | Longitude | Wharton, Jack | |||
4 | Transect | Transect | Wharton, Jack | |||
5 | Timeslice | Timeslice | Wharton, Jack | |||
6 | ELEVATION | Elevation | m a.s.l. | Wharton, Jack | Geocode | |
7 | Foraminifera, benthic δ18O | Foram benth δ18O | ‰ PDB | Wharton, Jack | Isotope ratio mass spectrometry | vs. VPDB |
8 | Foraminifera, benthic δ18O, standard error | Foram benth std e | ± | Wharton, Jack | ||
9 | Sortable-silt mean | SS | µm | Wharton, Jack | ||
10 | Sortable-silt mean, standard error | SS std e | ± | Wharton, Jack | ||
11 | Reference/source | Reference | Wharton, Jack |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
209 data points