(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: 198-1209B; Acarinina soldadoensis; Magnesium/Calcium ratio; δ13C; δ18O; DEPTH; sediment/rock; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Joides Resolution; Leg198; Morozovella velascoensis; North Pacific Ocean; Ocean Drilling Program; ODP; Sample code/label; Pacific; Planktonic foraminifera
• Online Access: https://doi.pangaea.de/10.1594/PANGAEA.772090; https://doi.org/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.