(Table S1) Stable carbon and oxygen isotopes and Mg/Ca ratios of planktonic foraminifera from ODP Hole 198-1209B ...

• Main Authors: Zachos, James C, Wara, Michael W, Bohaty, Steven M, Delaney, Margaret Lois, Petrizzo, Maria Rose, Brill, Amanda, Bralower, Timothy J, Premoli Silva, Isabella
• Format: Dataset
• Language: English
• Published: PANGAEA 2003
• Subjects: DEPTH, sediment/rock; Sample code/label; Morozovella velascoensis, δ13C; Morozovella velascoensis, δ18O; Acarinina soldadoensis, δ13C; Acarinina soldadoensis, δ18O; Morozovella velascoensis, Magnesium/Calcium ratio; Acarinina soldadoensis, Magnesium/Calcium ratio; Drilling/drill rig; DSDP/ODP/IODP sample designation; Leg198; Joides Resolution; Ocean Drilling Program ODP; Planktonic foraminifera
• Online Access: https://dx.doi.org/10.1594/pangaea.772090; https://doi.pangaea.de/10.1594/PANGAEA.772090

The Paleocene-Eocene Thermal Maximum (PETM) has been attributed to a rapid rise in greenhouse gas levels. If so, warming should have occurred at all latitudes, although amplified toward the poles. Existing records reveal an increase in high-latitude sea surface temperatures (SSTs) (8° to 10°C) and in bottom water temperatures (4° to 5°C). To date, however, the character of the tropical SST response during this event remains unconstrained. Here we address this deficiency by using paired oxygen isotope and minor element (magnesium/calcium) ratios of planktonic foraminifera from a tropical Pacific core to estimate changes in SST. Using mixed-layer foraminifera, we found that the combined proxies imply a 4° to 5°C rise in Pacific SST during the PETM. These results would necessitate a rise in atmospheric pCO2 to levels three to four times as high as those estimated for the late Paleocene. ... : Sediment depth is given in mcd. ...