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| Natura: | Dataset Open Access |
| Lingua: | en |
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PANGAEA
2015
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| Accesso online: | https://doi.org/10.1594/PANGAEA.855850 |
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| _version_ | 1867168170010214400 |
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| author | de Boer, Bas Lourens, Lucas Joost van de Wal, Roderik S W |
| author_facet | de Boer, Bas Lourens, Lucas Joost van de Wal, Roderik S W |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | Marine sediment records from the Oligocene and Miocene reveal clear 400,000-year (400-kyr) climate cycles related to variations in orbital eccentricity. These cycles are also observed in the Plio-Pleistocene records of the global carbon cycle. However they are absent in the Late Pleistocene ice-age record over the past 1.5 million years. Here, we present a simulation of global ice volume over the past 5 million years with a coupled system of four 3-D ice-sheet models. Our simulation shows that the 400-kyr long eccentricity cycles of Antarctica vary coherently with d13C records during the Pleistocene suggesting that they drive the long-term carbon cycle changes throughout the past 35 million years. The 400-kyr response of Antarctica is eventually suppressed by the dominant 100-kyr glacial cycles of the large ice sheets in the Northern Hemisphere (NH). |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_855850 |
| institution | PANGAEA |
| language | en |
| publishDate | 2015 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | A 5 million year reconstruction of sea level, temperature, and sea water δ¹⁸O de Boer, Bas Lourens, Lucas Joost van de Wal, Roderik S W Marine sediment records from the Oligocene and Miocene reveal clear 400,000-year (400-kyr) climate cycles related to variations in orbital eccentricity. These cycles are also observed in the Plio-Pleistocene records of the global carbon cycle. However they are absent in the Late Pleistocene ice-age record over the past 1.5 million years. Here, we present a simulation of global ice volume over the past 5 million years with a coupled system of four 3-D ice-sheet models. Our simulation shows that the 400-kyr long eccentricity cycles of Antarctica vary coherently with d13C records during the Pleistocene suggesting that they drive the long-term carbon cycle changes throughout the past 35 million years. The 400-kyr response of Antarctica is eventually suppressed by the dominant 100-kyr glacial cycles of the large ice sheets in the Northern Hemisphere (NH). |
| title | A 5 million year reconstruction of sea level, temperature, and sea water δ¹⁸O |
| topic | |
| url | https://doi.org/10.1594/PANGAEA.855850 |