Stable isotope ratios and paleoceanaographic reconstructions from sediment cores 80-548 and 161-978A, supplementary data to: Kh?lifi, Nabil; Sarnthein, Michael; Andersen, Nils; Blanz, Thomas; Frank, Martin; Garbe-Sch?nberg, Carl-Dieter; Haley, Brian A; Stumpf, Rick; Weinelt, Mara (2009): A major and long-term Pliocene intensification of the Mediterranean Outflow, 3.5 - 3.3 Ma ago. Geology, 37(9), 811-814
2009
Online
Buch
- 2 Datasets
Zugriff:
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.
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Stable isotope ratios and paleoceanaographic reconstructions from sediment cores 80-548 and 161-978A, supplementary data to: Kh?lifi, Nabil; Sarnthein, Michael; Andersen, Nils; Blanz, Thomas; Frank, Martin; Garbe-Sch?nberg, Carl-Dieter; Haley, Brian A; Stumpf, Rick; Weinelt, Mara (2009): A major and long-term Pliocene intensification of the Mediterranean Outflow, 3.5 - 3.3 Ma ago. Geology, 37(9), 811-814
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Autor/in / Beteiligte Person: | Kh?lifi, Nabil ; Sarnthein, Michael ; Andersen, Nils ; Blanz, Thomas, gnd_1044014571 ; Frank, Martin ; Garbe-Sch?nberg, Carl-Dieter ; Haley, Brian A ; Stumpf, Rick ; Weinelt, Mara |
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Veröffentlichung: | 2009 |
Medientyp: | Buch |
Umfang: | 2 Datasets |
DOI: | 10.1594/PANGAEA.7168488 |
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