Sedimentology and stable isotope ratios of planktonic foraminifera from two cores off Northeastern Brazil, supplement to: Arz, Helge Wolfgang; Pätzold, Jürgen; Wefer, Gerold (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

• Main Authors: Arz, Helge Wolfgang, Pätzold, Jürgen, Wefer, Gerold
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA - Data Publisher for Earth & Environmental Science 1998
• Subjects: Gravity corer Kiel type; JOPSII-6; M34/4; Victor Hensen; Meteor 1986; South Atlantic in Late Quaternary Reconstruction of Budget and Currents SFB261; Greenland; Greenland ice cores; North Atlantic; Planktonic foraminifera
• Online Access: https://dx.doi.org/10.1594/pangaea.711735; https://doi.pangaea.de/10.1594/PANGAEA.711735

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.