Stable isotope ratios and paleoceanaographic reconstructions from sediment cores 80-548 and 161-978A
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| Autores principales: | , , , , , , , , |
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| Formato: | Dataset Open Access |
| Lenguaje: | en |
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PANGAEA
2009
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| _version_ | 1867167661471825920 |
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| author | Khélifi, Nabil Sarnthein, Michael Andersen, Nils Blanz, Thomas Frank, Martin Garbe-Schönberg, Dieter Haley, Brian A Stumpf, Rick Weinelt, Mara |
| author_facet | Khélifi, Nabil Sarnthein, Michael Andersen, Nils Blanz, Thomas Frank, Martin Garbe-Schönberg, Dieter Haley, Brian A Stumpf, Rick Weinelt, Mara |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | Largely continuous millennial-scale records of benthic d18O, Mg/Ca-based temperature, and salinity variations in bottom waters were obtained from Deep Sea Drilling Project Site 548 (eastern Atlantic continental margin south of Ireland, 1250 m water depth) for the period between 3.7 and 3.0 million years ago. This site monitored mid-Pliocene changes in Mediterranean Outflow Water (MOW) documented by continuously high Nd values between -10.7 and -9. Site 978 (Alboran Sea, 1930 m water depth) provides a complementary record of bottom water variability in the westernmost Mediterranean Sea, which is taken to represent MOW composition at its source. Both sites are marked by a singular and persistent rise in bottom water salinities by 0.7-1.4 psu and in densities by ~1 kg m-3 from 3.5 to 3.3 Ma, which is matched by an average 3 °C increase in bottom water temperatures at Site 548. This event suggests the onset of strongly enhanced deep-water convection in the Mediterranean Sea and a related strengthened MOW flow, which implies a major aridification of the Mediterranean source region. In harmony with model suggestions, the enhanced MOW flow has possibly intensified Upper North Atlantic Deep Water formation. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_716848 |
| institution | PANGAEA |
| language | en |
| publishDate | 2009 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Stable isotope ratios and paleoceanaographic reconstructions from sediment cores 80-548 and 161-978A Khélifi, Nabil Sarnthein, Michael Andersen, Nils Blanz, Thomas Frank, Martin Garbe-Schönberg, Dieter Haley, Brian A Stumpf, Rick Weinelt, Mara 161-978A; 80-548; Alboran Sea; Deep Sea Drilling Project; DRILL; Drilling/drill rig; DSDP; Glomar Challenger; Joides Resolution; Leg161; Leg80; North Atlantic/SPUR; Ocean Drilling Program; ODP Largely continuous millennial-scale records of benthic d18O, Mg/Ca-based temperature, and salinity variations in bottom waters were obtained from Deep Sea Drilling Project Site 548 (eastern Atlantic continental margin south of Ireland, 1250 m water depth) for the period between 3.7 and 3.0 million years ago. This site monitored mid-Pliocene changes in Mediterranean Outflow Water (MOW) documented by continuously high Nd values between -10.7 and -9. Site 978 (Alboran Sea, 1930 m water depth) provides a complementary record of bottom water variability in the westernmost Mediterranean Sea, which is taken to represent MOW composition at its source. Both sites are marked by a singular and persistent rise in bottom water salinities by 0.7-1.4 psu and in densities by ~1 kg m-3 from 3.5 to 3.3 Ma, which is matched by an average 3 °C increase in bottom water temperatures at Site 548. This event suggests the onset of strongly enhanced deep-water convection in the Mediterranean Sea and a related strengthened MOW flow, which implies a major aridification of the Mediterranean source region. In harmony with model suggestions, the enhanced MOW flow has possibly intensified Upper North Atlantic Deep Water formation. |
| title | Stable isotope ratios and paleoceanaographic reconstructions from sediment cores 80-548 and 161-978A |
| topic | 161-978A; 80-548; Alboran Sea; Deep Sea Drilling Project; DRILL; Drilling/drill rig; DSDP; Glomar Challenger; Joides Resolution; Leg161; Leg80; North Atlantic/SPUR; Ocean Drilling Program; ODP |
| url | https://doi.org/10.1594/PANGAEA.716848 |