Mg/Ca and stable isotope record of benthic foraminifera of the Paleocene-Eocene Thermal Maximum
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| Main Authors: | , |
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| Format: | Dataset Open Access |
| Language: | en |
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PANGAEA
2005
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| _version_ | 1867168555365040128 |
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| author | Tripati, Aradhna K Elderfield, Henry |
| author_facet | Tripati, Aradhna K Elderfield, Henry |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | 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. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_738241 |
| institution | PANGAEA |
| language | en |
| publishDate | 2005 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Mg/Ca and stable isotope record of benthic foraminifera of the Paleocene-Eocene Thermal Maximum Tripati, Aradhna K Elderfield, Henry 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 Ocean 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. |
| title | Mg/Ca and stable isotope record of benthic foraminifera of the Paleocene-Eocene Thermal Maximum |
| topic | 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 Ocean |
| url | https://doi.org/10.1594/PANGAEA.738241 |