Cayre, Olivia; Vincent, Edith; Lancelot, Yves; Hall, Michael A (1999): Stable oxygen and carbon isotope ratios of Globigerina bulloides in sediment core MD95-2042 of the Iberian Margin, North Atlantic [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.60829, Supplement to: Cayre, Olivia; Lancelot, Yves; Vincent, Edith; Hall, Melinda (1999): Paleoceanographic reconstructions from planctonic foraminifera off the Iberian Margin: temperature, salinity and Heinrich Events. Paleoceanography, 14(3), 384-396, https://doi.org/10.1029/1998PA900027
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Abstract:
A quantitative analysis of planktonic foraminifera in a core from the Iberian Margin allows a reconstruction of the evolution of oceanographic parameters during the last glacial cycle with a resolution of ~1000 years. A principal component analysis performed on 19 species allows the identification of 11 intervals characterized by increased abundances of the subpolar species. The youngest six of these intervals are correlated with the last 6 Heinrich events (HEs). The five cold events older than stage 4 are dated at 81, 90, 110, 129, and 140 ka, respectively. Paleotemperatures reconstructed using the modern analog technique indicate 4°C decreases during all even-numbered isotopic stages and stage 3. During the HEs, temperature decreases reach ~10°C and seawater delta18O anomalies reach ~1 per mil. Temperature and salinity reconstructions indicate that the environment of the Iberian Margin has been under the combined influence of global factors such as the migration of the polar front and iceberg discharge and of regional factors such as the precipitation/evaporation regime on both oceanic and continental area.
Project(s):
Coverage:
Latitude: 37.799833 * Longitude: -10.166500
Date/Time Start: 1995-07-09T00:00:00 * Date/Time End: 1995-07-09T00:00:00
Minimum DEPTH, sediment/rock: 0.0 m * Maximum DEPTH, sediment/rock: 29.8 m
Event(s):
MD95-2042 (MD952042) * Latitude: 37.799833 * Longitude: -10.166500 * Date/Time: 1995-07-09T00:00:00 * Elevation: -3146.0 m * Recovery: 40 m * Location: Marge Ibérique * Campaign: MD101 (IMAGES I) * Basis: Marion Dufresne (1995) * Method/Device: Calypso Corer (CALYPSO) * Comment: XXVII Sections, OK; core bent
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | DEPTH, sediment/rock | Depth sed | m | Geocode | ||
| 2 | Globigerina bulloides, δ18O | G. bulloides δ18O | ‰ PDB | Cayre, Olivia | Mass spectrometer VG SIRA | size fraction 250-350 µm |
| 3 | Globigerina bulloides, δ13C | G. bulloides δ13C | ‰ PDB | Cayre, Olivia | Mass spectrometer VG SIRA | size fraction 250-350 µm |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
368 data points