Planktic foraminiferal abundance and faunal-derived sea surface temperature of eastern equatorial Pacific ODP Site 202-1240
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| Format: | Dataset Open Access |
| Sprache: | en |
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PANGAEA
2012
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| author | Yu, Pai-Sen Kienast, Markus Chen, Min-Te Cacho, Isabel Flores, José-Abel Mohtadi, Mahyar Mix, Alan C |
| author_facet | Yu, Pai-Sen Kienast, Markus Chen, Min-Te Cacho, Isabel Flores, José-Abel Mohtadi, Mahyar Mix, Alan C |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | Glacial cooling (~1-5°C) in the eastern equatorial Pacific (EEP) cold tongue is often attributed to increased equatorial upwelling, stronger advection from the Peru-Chile Current (PCC), and to the more remote subpolar southeastern Pacific water mass. However, evidence is scarce for identifying unambiguously which process plays a more important role in driving the large glacial cooling in the EEP. To address this question, here we adopt a faunal calibration approach using planktic foraminifers with a new compilation of coretop data from the eastern Pacific, and present new downcore variation data of fauna assemblage and estimated sea surface temperatures (SSTs) for the past 160 ka (Marine Isotope Stage (MIS) 6) from ODP Site 1240 in the EEP. With significant improvement achieved by adding more coretop data from the eastern boundary current, our downcore calibration results indicate that most of the glacial cooling episodes over the past 160 ka in the EEP are attributable to increased influence from the subpolar water mass from high latitudes of the southern Pacific. By applying this new calibration of the fauna SST transfer function to a latitudinal transect of eastern Pacific (EP) cores, we find that the subpolar water mass has been a major dynamic contributor to EEP cold tongue cooling since MIS 6. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_807103 |
| institution | PANGAEA |
| language | en |
| publishDate | 2012 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Planktic foraminiferal abundance and faunal-derived sea surface temperature of eastern equatorial Pacific ODP Site 202-1240 Yu, Pai-Sen Kienast, Markus Chen, Min-Te Cacho, Isabel Flores, José-Abel Mohtadi, Mahyar Mix, Alan C 202-1240; COMPCORE; Composite Core; Equatorial East Pacific; Joides Resolution; Leg202; Ocean Drilling Program; ODP Glacial cooling (~1-5°C) in the eastern equatorial Pacific (EEP) cold tongue is often attributed to increased equatorial upwelling, stronger advection from the Peru-Chile Current (PCC), and to the more remote subpolar southeastern Pacific water mass. However, evidence is scarce for identifying unambiguously which process plays a more important role in driving the large glacial cooling in the EEP. To address this question, here we adopt a faunal calibration approach using planktic foraminifers with a new compilation of coretop data from the eastern Pacific, and present new downcore variation data of fauna assemblage and estimated sea surface temperatures (SSTs) for the past 160 ka (Marine Isotope Stage (MIS) 6) from ODP Site 1240 in the EEP. With significant improvement achieved by adding more coretop data from the eastern boundary current, our downcore calibration results indicate that most of the glacial cooling episodes over the past 160 ka in the EEP are attributable to increased influence from the subpolar water mass from high latitudes of the southern Pacific. By applying this new calibration of the fauna SST transfer function to a latitudinal transect of eastern Pacific (EP) cores, we find that the subpolar water mass has been a major dynamic contributor to EEP cold tongue cooling since MIS 6. |
| title | Planktic foraminiferal abundance and faunal-derived sea surface temperature of eastern equatorial Pacific ODP Site 202-1240 |
| topic | 202-1240; COMPCORE; Composite Core; Equatorial East Pacific; Joides Resolution; Leg202; Ocean Drilling Program; ODP |
| url | https://doi.org/10.1594/PANGAEA.807103 |