Alkenone and boron based Oligocene pCO2 records
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| Autores principales: | , , , , , |
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| Formato: | Dataset Open Access |
| Lenguaje: | en |
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PANGAEA
2010
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| _version_ | 1867167662544519168 |
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| author | Seki, Osamu Foster, Gavin L Schmidt, Daniela N Mackensen, Andreas Kawamura, Kimitaka Pancost, Richard D |
| author_facet | Seki, Osamu Foster, Gavin L Schmidt, Daniela N Mackensen, Andreas Kawamura, Kimitaka Pancost, Richard D |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | The Pliocene period is the most recent time when the Earth was globally significantly (~3°C) warmer than today. However, the existing pCO2 data for the Pliocene are sparse and there is little agreement between the various techniques used to reconstruct palaeo-pCO2. Moreover, the temporal resolution of the published records does not allow a robust assessment of the role of declining pCO2 in the intensification of the Northern Hemisphere Glaciation (INHG) and a direct comparison to other proxy records are lacking. For the first time, we use a combination of foraminiferal (delta11B) and organic biomarker (alkenone-derived carbon isotopes) proxies to determine the concentration of atmospheric CO2 over the past 5 Ma. Both proxy records show that during the warm Pliocene pCO2 was between 330 and 400 ppm, i.e. similar to today. The decrease to values similar to pre-industrial times (275-285 ppm) occurred between 3.2 Ma and 2.8 Ma - coincident with the INHG and affirming the link between global climate, the cryosphere and pCO2. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_732923 |
| institution | PANGAEA |
| language | en |
| publishDate | 2010 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Alkenone and boron based Oligocene pCO2 records Seki, Osamu Foster, Gavin L Schmidt, Daniela N Mackensen, Andreas Kawamura, Kimitaka Pancost, Richard D 154-925E; 154-926A; 154-927B; 154-928A; 154-929A; 165-999A; 202-1241A; Caribbean Sea; DRILL; Drilling/drill rig; Joides Resolution; Leg154; Leg165; Leg202; North Atlantic Ocean; North Pacific Ocean; Ocean Drilling Program; ODP The Pliocene period is the most recent time when the Earth was globally significantly (~3°C) warmer than today. However, the existing pCO2 data for the Pliocene are sparse and there is little agreement between the various techniques used to reconstruct palaeo-pCO2. Moreover, the temporal resolution of the published records does not allow a robust assessment of the role of declining pCO2 in the intensification of the Northern Hemisphere Glaciation (INHG) and a direct comparison to other proxy records are lacking. For the first time, we use a combination of foraminiferal (delta11B) and organic biomarker (alkenone-derived carbon isotopes) proxies to determine the concentration of atmospheric CO2 over the past 5 Ma. Both proxy records show that during the warm Pliocene pCO2 was between 330 and 400 ppm, i.e. similar to today. The decrease to values similar to pre-industrial times (275-285 ppm) occurred between 3.2 Ma and 2.8 Ma - coincident with the INHG and affirming the link between global climate, the cryosphere and pCO2. |
| title | Alkenone and boron based Oligocene pCO2 records |
| topic | 154-925E; 154-926A; 154-927B; 154-928A; 154-929A; 165-999A; 202-1241A; Caribbean Sea; DRILL; Drilling/drill rig; Joides Resolution; Leg154; Leg165; Leg202; North Atlantic Ocean; North Pacific Ocean; Ocean Drilling Program; ODP |
| url | https://doi.org/10.1594/PANGAEA.732923 |