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

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 i...

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Bibliographic Details
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
Description
Summary: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.

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