Geochemical and palynological results of IODP Hole 302-M0004A from Lomonosov Ridge, Arctic Ocean
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| Formato: | Dataset Open Access |
| Lenguaje: | en |
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PANGAEA
2010
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| _version_ | 1867171359162892288 |
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| author | Sluijs, Appy Schouten, Stefan Donders, Timme H Schoon, Petra L Röhl, Ursula Reichart, Gert-Jan Sangiorgi, Francesca Kim, Jung-Hyun Sinninghe Damsté, Jaap S Brinkhuis, Henk |
| author_facet | Sluijs, Appy Schouten, Stefan Donders, Timme H Schoon, Petra L Röhl, Ursula Reichart, Gert-Jan Sangiorgi, Francesca Kim, Jung-Hyun Sinninghe Damsté, Jaap S Brinkhuis, Henk |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | Several episodes of abrupt and transient warming, each lasting between 50,000 and 200,000 years, punctuated the long-term warming during the Late Palaeocene and Early Eocene (58 to 51 Myr ago) epochs**1,2. These hyperthermal events, such as the Eocene Thermal Maximum 2 (ETM2) that took place about 53.5 Myr ago**2, are associated with rapid increases in atmospheric CO2 content. However, the impacts of most events are documented only locally**3,4. Here we show, on the basis of estimates from the TEX86' proxy, that sea surface temperatures rose by 3-5 °C in the Arctic Ocean during the ETM2. Dinoflagellate fossils demonstrate a concomitant freshening and eutrophication of surface waters, which resulted in euxinia in the photic zone. The presence of palm pollen implies**5 that coldest month mean temperatures over the Arctic land masses were no less than 8 °C, in contradiction of model simulations that suggest hyperthermal winter temperatures were below freezing**6. In light of our reconstructed temperature and hydrologic trends, we conclude that the temperature and hydrographic responses to abruptly increased atmospheric CO2 concentrations were similar for the ETM2 and the better-described Palaeocene-Eocene Thermal Maximum**7,8, 55.5 Myr ago. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_735745 |
| institution | PANGAEA |
| language | en |
| publishDate | 2010 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Geochemical and palynological results of IODP Hole 302-M0004A from Lomonosov Ridge, Arctic Ocean Sluijs, Appy Schouten, Stefan Donders, Timme H Schoon, Petra L Röhl, Ursula Reichart, Gert-Jan Sangiorgi, Francesca Kim, Jung-Hyun Sinninghe Damsté, Jaap S Brinkhuis, Henk 302-M0004A; ACEX-M4A; Arctic Coring Expedition, ACEX; Arctic Ocean; CCGS Captain Molly Kool (Vidar Viking); Exp302; Integrated Ocean Drilling Program / International Ocean Discovery Program; IODP Several episodes of abrupt and transient warming, each lasting between 50,000 and 200,000 years, punctuated the long-term warming during the Late Palaeocene and Early Eocene (58 to 51 Myr ago) epochs**1,2. These hyperthermal events, such as the Eocene Thermal Maximum 2 (ETM2) that took place about 53.5 Myr ago**2, are associated with rapid increases in atmospheric CO2 content. However, the impacts of most events are documented only locally**3,4. Here we show, on the basis of estimates from the TEX86' proxy, that sea surface temperatures rose by 3-5 °C in the Arctic Ocean during the ETM2. Dinoflagellate fossils demonstrate a concomitant freshening and eutrophication of surface waters, which resulted in euxinia in the photic zone. The presence of palm pollen implies**5 that coldest month mean temperatures over the Arctic land masses were no less than 8 °C, in contradiction of model simulations that suggest hyperthermal winter temperatures were below freezing**6. In light of our reconstructed temperature and hydrologic trends, we conclude that the temperature and hydrographic responses to abruptly increased atmospheric CO2 concentrations were similar for the ETM2 and the better-described Palaeocene-Eocene Thermal Maximum**7,8, 55.5 Myr ago. |
| title | Geochemical and palynological results of IODP Hole 302-M0004A from Lomonosov Ridge, Arctic Ocean |
| topic | 302-M0004A; ACEX-M4A; Arctic Coring Expedition, ACEX; Arctic Ocean; CCGS Captain Molly Kool (Vidar Viking); Exp302; Integrated Ocean Drilling Program / International Ocean Discovery Program; IODP |
| url | https://doi.org/10.1594/PANGAEA.735745 |