Mg/Ca and stable isotope record of benthic foraminifera of the Paleocene-Eocene Thermal Maximum

A rapid increase in greenhouse gas levels is thought to have fueled global warming at the Paleocene-Eocene Thermal Maximum (PETM). Foraminiferal magnesium/calcium ratios indicate that bottom waters warmed by 4° to 5°C, similar to tropical and subtropical surface ocean waters, implying no amplificati...

Full description

Bibliographic Details
Main Authors: Tripati, Aradhna K, Elderfield, Henry
Format: Dataset
Language:English
Published: PANGAEA 2005
Subjects:
143-865C
198-1209B
74-527
Deep Sea Drilling Project
DRILL
Drilling/drill rig
DSDP
Glomar Challenger
Joides Resolution
Leg143
Leg198
Leg74
North Pacific Ocean
Ocean Drilling Program
ODP
South Atlantic
Pacific
Southern Ocean
Methane hydrate
Online Access:https://doi.pangaea.de/10.1594/PANGAEA.738241
https://doi.org/10.1594/PANGAEA.738241
Description
Summary:A rapid increase in greenhouse gas levels is thought to have fueled global warming at the Paleocene-Eocene Thermal Maximum (PETM). Foraminiferal magnesium/calcium ratios indicate that bottom waters warmed by 4° to 5°C, similar to tropical and subtropical surface ocean waters, implying no amplification of warming in high-latitude regions of deep-water formation under ice-free conditions. Intermediate waters warmed before the carbon isotope excursion, in association with downwelling in the North Pacific and reduced Southern Ocean convection, supporting changing circulation as the trigger for methane hydrate release. A switch to deep convection in the North Pacific at the PETM onset could have amplified and sustained warming.

Similar Items