Wharton, Jack; Renoult, Martin; Gebbie, Geoffrey; Keigwin, Lloyd D; Marchitto, Thomas M; Maslin, Mark; Oppo, Delia W; Thornalley, David J R: Monospecific benthic δ18O data 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.pangaea.de/10.1594/PANGAEA.967471 (dataset in review), In: Wharton, J et al.: 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.pangaea.de/10.1594/PANGAEA.967462 (dataset in review)
Abstract:
This dataset contains monospecific benthic δ18O data from cores that form depth transects at Cape Hatteras and Blake Outer Ridge. Data is from either the Mid-Holocene or LGM and is combined to form multi-species benthic δ18O means for each core during the Mid-Holocene and/or LGM (can you add a link to Vertical δ18O profiles from Cape Hatteras and Blake Outer Ridge during the Mid-Holocene (2-6 ka BP) and LGM (19-23 ka BP)?). For species that calcify in disequilibrium with the surrounding seawater, e.g., Uvigerina peregrina, species specific correction factors have been applied. For infaunal species where a range of values are published, the correction factor is determined by calculating the average offset from coeval measurements on C. wuellerstorfi or other epifaunal species, which, in all cases, are within the range of uncertainty of published correction factors. Reproducibility is the species specific error for each transect (e.g., Cape Hatteras) and timeslice (e.g., LGM) and n is the number of individual foraminifera in each measurement. 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.
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: 34.491532 * Median Longitude: -71.989164 * 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: -5010.0 m * Maximum Elevation: -665.0 m
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):
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0) (License comes into effect after moratorium ends)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
2016 data points
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