Isotope and water temperature measurements of the Atlantic Ocean from ODP Site 172-1056 ...

• Main Authors: Billups, Katharina, Chaisson, William P, Worsnopp, M, Thunell, Robert C
• Format: Dataset
• Language: English
• Published: PANGAEA 2004
• Subjects: Sample code/label; DEPTH, sediment/rock; Age, dated; Globigerinoides sacculifer, δ18O; Neogloboquadrina dutertrei, δ18O; Temperature, water; Composite Core; DSDP/ODP/IODP sample designation; Leg172; Joides Resolution; Ocean Drilling Program ODP; North Atlantic
• Online Access: https://dx.doi.org/10.1594/pangaea.741956; https://doi.pangaea.de/10.1594/PANGAEA.741956

We use planktonic foraminiferal (Globigerinoides sacculifer and Neogloboquadrina dutertrei) d18O records from subtropical North Atlantic Site 1056 to reconstruct millennial-scale changes in sea surface hydrography during marine isotope stages (MIS) 10 through 12 (340-440 ka). The difference in the d18O records provides a measure of the thermal gradient from the mixed layer to the seasonal thermocline (delta Tml-tc), which we use to constrain upper ocean stratification and infer northward ocean heat transport. Late Holocene G. sacculifer and N. dutertrei d18O values place controls on how the foraminifera record recent ocean conditions at Site 1056. In the down core record we find extreme excursions toward G. sacculifer d18O maxima and delta Tml-tc minima throughout the entire time interval. These cold events have a similar amplitude throughout but are more frequent during the glacial than the interglacial intervals. During interglacial MIS 11 the excursions provide evidence for repeated cooling of the sea ... : Supplement to: Billups, Katharina; Chaisson, William P; Worsnopp, M; Thunell, Robert C (2004): Millennial-scale fluctuations in subtropical northwestern Atlantic surface ocean hydrography during the mid-Pleistocene. Paleoceanography, 19(2), PA2017 ...