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Arz, Helge W; Pätzold, Jürgen; Wefer, Gerold (1998): Sedimentology and stable isotope ratios of planktonic foraminifera from two cores off Northeastern Brazil. PANGAEA, https://doi.org/10.1594/PANGAEA.711735, Supplement to: Arz, HW et al. (1998): Correlated millennial-scale changes in surface hydrography and terrigenous sediment yield inferred from last-glacial marine deposits off northeastern Brazil. Quaternary Research, 50(2), 157-166, https://doi.org/10.1006/qres.1998.1992

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Abstract:
The stable isotope composition of planktonic foraminifera correlates with evidence for pulses of terrigenous sediment in a sediment core from the upper continental slope off northeastern Brazil. Stable oxygen isotope records of the planktonic foraminiferal species Globigerinoides sacculifer and Globigerinoides ruber (pink) reveal sub-Milankovitch changes in sea-surface hydrography during the last 85,000 yr. Warming of the surface water coincided with terrigenous sedimentation pulses that are inferred from high XRF intensities of Ti and Fe, and which suggest humid conditions in northeast Brazil. These tropical signals correlate with climatic oscillations recorded in Greenland ice cores (Dansgaard-Oeschger cycles) and in sediment cores from the North Atlantic (Heinrich events). Trade winds may have caused changes in the North Brazil Current that altered heat and salt flux into the North Atlantic, thus affecting the growth and decay of the large glacial ice sheets.
Related to:
Arz, Helge W (1998): Dokumentation von kurzfristigen Klimaschwankungen des Spätquartärs in Sedimenten des westlichen äquatorialen Atlantiks. Berichte aus dem Fachbereich Geowissenschaften der Universität Bremen, 124, 96 pp, urn:nbn:de:gbv:46-ep000102433
Coverage:
Latitude: -3.666667 * Longitude: -37.716667
Date/Time Start: 1995-03-14T00:00:00 * Date/Time End: 1996-03-30T00:00:00
Event(s):
GeoB3104-1 * Latitude: -3.666667 * Longitude: -37.716667 * Date/Time: 1995-03-14T00:00:00 * Elevation: -767.0 m * Recovery: 5.25 m * Location: NE-Brazilian continental margin * Campaign: JOPSII-6 * Basis: Victor Hensen * Device: Gravity corer (Kiel type) (SL)
GeoB3912-1 * Latitude: -3.666667 * Longitude: -37.716667 * Date/Time: 1996-03-30T00:00:00 * Elevation: -772.0 m * Recovery: 6.8 m * Location: Northeast Brasilian Margin * Campaign: M34/4 * Basis: Meteor (1986) * Device: Gravity corer (Kiel type) (SL) * Comment: CC: light gray carbonate mud, sandy, forams
Size:
7 datasets

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