Paleotemperature and productivity reconstruction of sediment core D11957P on the Iberian Margin
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| Format: | Dataset Open Access |
| Sprache: | en |
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PANGAEA
1997
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| _version_ | 1867170456601100288 |
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| author | Lebreiro, Susana Martin Moreno, J C Abrantes, Fatima F Pflaumann, Uwe |
| author_facet | Lebreiro, Susana Martin Moreno, J C Abrantes, Fatima F Pflaumann, Uwe |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | Foraminifera counts and climatic assemblages from the Tore Seamount are used to approach the glacial and interglacial changes in temperature and productivity on the Iberian Margin over the last 225 kyr. Chronostratigraphy is based on Globigerinoides ruber and Globigerina bulloides oxygen isotopes and supported by foraminifera and carbonate stadial fluctuations. Foraminifera indicate cooling from late interglacial stage 5 to the beginning of Termination I (TI). Neogloboquadnna pachyderma-s reflects cold conditions during glacial stages 4-2. In contrast, glacial stage 6 is dominated by warmer N. pachyderma-d and dutertrei and a restricted arctic assemblage. Past sea surface temperatures confirm the general cooling, reaching 4.3°C (SIMMAX.28) during stage 2. Multiple productivity proxies such as organic carbon, productivity-related foraminifera, and delta13C constrain the changes observed. A productivity increase occurs after interglacial stage 5, enhanced from late glacial stage 3 to TI Present-day satellite-detected phytoplankton plumes off Portugal would have accounted in the past glacial stages for the general productivity increase over the Tore. On top of this, welldefined peaks of organic carbon and productivity-related foraminifera correspond with Heinrich events 1-4. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_730405 |
| institution | PANGAEA |
| language | en |
| publishDate | 1997 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Paleotemperature and productivity reconstruction of sediment core D11957P on the Iberian Margin Lebreiro, Susana Martin Moreno, J C Abrantes, Fatima F Pflaumann, Uwe D11957P; D187; Discovery (1962); PC; Piston corer Foraminifera counts and climatic assemblages from the Tore Seamount are used to approach the glacial and interglacial changes in temperature and productivity on the Iberian Margin over the last 225 kyr. Chronostratigraphy is based on Globigerinoides ruber and Globigerina bulloides oxygen isotopes and supported by foraminifera and carbonate stadial fluctuations. Foraminifera indicate cooling from late interglacial stage 5 to the beginning of Termination I (TI). Neogloboquadnna pachyderma-s reflects cold conditions during glacial stages 4-2. In contrast, glacial stage 6 is dominated by warmer N. pachyderma-d and dutertrei and a restricted arctic assemblage. Past sea surface temperatures confirm the general cooling, reaching 4.3°C (SIMMAX.28) during stage 2. Multiple productivity proxies such as organic carbon, productivity-related foraminifera, and delta13C constrain the changes observed. A productivity increase occurs after interglacial stage 5, enhanced from late glacial stage 3 to TI Present-day satellite-detected phytoplankton plumes off Portugal would have accounted in the past glacial stages for the general productivity increase over the Tore. On top of this, welldefined peaks of organic carbon and productivity-related foraminifera correspond with Heinrich events 1-4. |
| title | Paleotemperature and productivity reconstruction of sediment core D11957P on the Iberian Margin |
| topic | D11957P; D187; Discovery (1962); PC; Piston corer |
| url | https://doi.org/10.1594/PANGAEA.730405 |