Oxygen isotope record of Globorotalia tumida and Globigerinoides sacculifer in sediments at ODP Site 130-806, supplement to: Billups, Katharina; Ravelo, Ana Christina; Zachos, James C; Norris, Richard D (1999): Link between oceanic heat transport, thermohaline circulation, and the Intertropical Convergence Zone in the early Pliocene Atlantic. Geology, 27(4), 319-322

• Main Authors: Billups, Katharina, Ravelo, Ana Christina, Zachos, James C, Norris, Richard D
• Format: Dataset
• Language: English
• Published: PANGAEA - Data Publisher for Earth & Environmental Science 1999
• Subjects: AGE; Globorotalia tumida, δ18O; Globigerinoides sacculifer, δ18O; Δδ18O; Composite Core; Leg130; Joides Resolution; Ocean Drilling Program ODP; Pacific; North Atlantic
• Online Access: https://dx.doi.org/10.1594/pangaea.712955; https://doi.pangaea.de/10.1594/PANGAEA.712955

Planktonic foraminiferal oxygen isotope records from the western and eastern tropical Pacific and Atlantic Oceans suggest a southward shift in the Intertropical Convergence Zone toward its modern location between 4.4 and 4.3 Ma. A concomitant shift in the carbon isotope compositions of Atlantic benthic foraminifera provides strong evidence for an increased thermohaline overturn at this time. We suggest that the southward shift of the Intertropical Convergence Zone and associated change in trade-wind circulation altered equatorial surface hydrography, increased the advection of warmer and more saline surface waters into the subtropical and North Atlantic, and contributed to thermohaline overturn. : Age was erroneously given in Ma, recalculated to ka on 2017-09-28.