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Dickson, Alexander J; Beer, Christopher J; Dempsey, Ciara; Maslin, Mark A; Bendle, James A; McClymont, Erin L; Pancost, Richard D (2009): Stable isotope record and aklenonen index of MIS 11 sediments [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.768375, Supplement to: Dickson, AJ et al. (2009): Oceanic forcing of the Marine Isotope Stage 11 interglacial. Nature Geoscience, 2, 428-433, https://doi.org/10.1038/ngeo527

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Abstract:
The interglacial known as Marine Isotope Stage 11 has been proposed to be analogous to the Holocene, owing to similarities in the amplitudes of orbital forcing. It has been difficult to compare the periods, however, because of the long duration of Stage 11 and a lack of detailed knowledge of any extreme climate events that may have occurred. Here we use the distinctive phasing between seasurface temperatures and the oxygen-isotope records of benthic foraminifera in the southeast Atlantic Ocean to stratigraphically align the Holocene interglacial with the first half of the Marine Isotope Stage 11 interglacial optimum. This alignment suggests that the second half of Marine Isotope Stage 11 should not be used as a reference for 'pre-anthropogenic' greenhouse-gas emissions. By compiling benthic carbon-isotope records from sites in the Atlantic Ocean on a single timescale, we also find that meridional overturning circulation strengthened about 415,000 years ago, at a time of high orbital obliquity. We propose that this mechanism transported heat to the high northern latitudes, inhibiting significant ice-sheet build-up and prolonging interglacial conditions. We suggest that this mechanism may have also prolonged other interglacial periods throughout the past 800,000 years.
Project(s):
Ocean Drilling Program (ODP)
Coverage:
Median Latitude: -29.059625 * Median Longitude: 13.861519 * South-bound Latitude: -29.374417 * West-bound Longitude: 13.835000 * North-bound Latitude: -28.995000 * East-bound Longitude: 13.989944
Date/Time Start: 1992-01-16T00:00:00 * Date/Time End: 1997-09-26T00:00:00
Event(s):
175-1085 * Latitude: -29.374417 * Longitude: 13.989944 * Date/Time: 1997-09-26T00:00:00 * Elevation: -1713.1 m * Penetration: 925.2 m * Recovery: 921 m * Location: Benguela Current, South Atlantic Ocean * Campaign: Leg175 * Basis: Joides Resolution * Method/Device: Composite Core (COMPCORE) * Comment: 99 cores; 925.2 m cored; 0 m drilled; 99.5% recovery
GeoB1720-2 * Latitude: -28.995000 * Longitude: 13.835000 * Date/Time: 1992-01-16T00:00:00 * Elevation: -1997.0 m * Recovery: 8.85 m * Location: Namibia continental slope * Campaign: M20/2 * Basis: Meteor (1986) * Method/Device: Gravity corer (Kiel type) (SL) * Comment: CC: Karbonatschlamm, weißgrün, Forams
GeoB1720-3 * Latitude: -28.998333 * Longitude: 13.836667 * Date/Time: 1992-01-16T00:00:00 * Elevation: -2004.0 m * Recovery: 0.17 m * Location: Namibia continental slope * Campaign: M20/2 * Basis: Meteor (1986) * Method/Device: MultiCorer (MUC) * Comment: 6 gr.,4 kl., Karbonatschl., Foram.
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
6 datasets

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Datasets listed in this publication series

  1. Dickson, AJ; Beer, CJ; Dempsey, C et al. (2009): (Table S6) UK'37 index and sea surface temperature reconstruction of ODP Site 175-1085. https://doi.org/10.1594/PANGAEA.768374
  2. Dickson, AJ; Beer, CJ; Dempsey, C et al. (2009): (Table S2) Stable isotope ratios of Cibicidoides wuellerstorfi of sediment cores GeoB1720-2. https://doi.org/10.1594/PANGAEA.768368
  3. Dickson, AJ; Beer, CJ; Dempsey, C et al. (2009): (Table S4) UK'37 index and sea surface temperature reconstruction of sediment cores GeoB1720-2. https://doi.org/10.1594/PANGAEA.768372
  4. Dickson, AJ; Beer, CJ; Dempsey, C et al. (2009): (Table S3) Stable isotope ratios of Cibicidoides wuellerstorfi sediment cores GeoB1720-3. https://doi.org/10.1594/PANGAEA.768369
  5. Dickson, AJ; Beer, CJ; Dempsey, C et al. (2009): (Table S5) UK'37 index and sea surface temperature reconstruction of sediment cores GeoB1720-3. https://doi.org/10.1594/PANGAEA.768373
  6. Dickson, AJ; Beer, CJ; Dempsey, C et al. (2009): (Table S1) Age determination of sediment cores GeoB1720-3 and GeoB1720-2. https://doi.org/10.1594/PANGAEA.768366