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| Main Authors: | , , , , , |
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| Format: | Dataset Open Access |
| Language: | en |
| Published: |
PANGAEA
2008
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| Subjects: | |
| Online Access: | https://doi.org/10.1594/PANGAEA.823287 |
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| _version_ | 1867169510512918528 |
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| author | Schouten, Stefan Eldrett, James S Greenwood, David R Harding, Ian C Baas, Marianne Sinninghe Damsté, Jaap S |
| author_facet | Schouten, Stefan Eldrett, James S Greenwood, David R Harding, Ian C Baas, Marianne Sinninghe Damsté, Jaap S |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | The Eocene-Oligocene (E-O) boundary interval is considered to be one of the major transitions in Earth's climate, witnessing the first major expansion of the East Antarctic Ice Sheet. However, the extent of the associated climatic cooling, especially for high northern latitude continental landmasses, is poorly constrained. In this study we reconstruct the first mean annual air temperature (MAAT) for the Greenland landmass during the late Eocene and early Oligocene by applying a new proxy based on the distribution of branched tetraether lipids derived from soil bacteria preserved in a marine sediment core from the Greenland Basin. The temperature estimates are compared with a composite continental temperature record based on bio-climatic analysis of pollen assemblages. Both proxies reveal comparable late Eocene MAATs of ~13-15 °C and a gradual long-term cooling of ~3-5 °C starting near the E-O boundary. These data are in agreement with other MAAT reconstructions from northern midlatitude continents and suggest a general cooling of the Northern Hemisphere during the E-O transition. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_823287 |
| institution | PANGAEA |
| language | en |
| publishDate | 2008 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Onset of long-term cooling of Greenland near the Eocene-Oligocene boundary as revealed by branched tetraether lipids Schouten, Stefan Eldrett, James S Greenwood, David R Harding, Ian C Baas, Marianne Sinninghe Damsté, Jaap S Ocean Drilling Program; ODP The Eocene-Oligocene (E-O) boundary interval is considered to be one of the major transitions in Earth's climate, witnessing the first major expansion of the East Antarctic Ice Sheet. However, the extent of the associated climatic cooling, especially for high northern latitude continental landmasses, is poorly constrained. In this study we reconstruct the first mean annual air temperature (MAAT) for the Greenland landmass during the late Eocene and early Oligocene by applying a new proxy based on the distribution of branched tetraether lipids derived from soil bacteria preserved in a marine sediment core from the Greenland Basin. The temperature estimates are compared with a composite continental temperature record based on bio-climatic analysis of pollen assemblages. Both proxies reveal comparable late Eocene MAATs of ~13-15 °C and a gradual long-term cooling of ~3-5 °C starting near the E-O boundary. These data are in agreement with other MAAT reconstructions from northern midlatitude continents and suggest a general cooling of the Northern Hemisphere during the E-O transition. |
| title | Onset of long-term cooling of Greenland near the Eocene-Oligocene boundary as revealed by branched tetraether lipids |
| topic | Ocean Drilling Program; ODP |
| url | https://doi.org/10.1594/PANGAEA.823287 |