Pliocene stable carbon and hydrogen isotopes of plant wax of ODP Site 108-659
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| Natura: | Dataset Open Access |
| Lingua: | en |
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PANGAEA
2017
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| _version_ | 1867169120614612992 |
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| author | Küchler, Rony R Dupont, Lydie M Schefuß, Enno |
| author_facet | Küchler, Rony R Dupont, Lydie M Schefuß, Enno |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | The Pliocene is regarded as a potential analogue for future climate with conditions generally warmer-than-today and higher-than-preindustrial atmospheric CO2 levels. Here we present the first orbitally resolved records of continental hydrology and vegetation changes from West Africa for two Pliocene time intervals (5.0-4.6 Ma, 3.6-3.0 Ma). Our results indicate that changes in local insolation alone are insufficient to explain the full degree of hydrologic variations. Generally two modes of interacting insolation forcings are observed: during eccentricity maxima, when precession was strong, the West African monsoon was driven by summer insolation; during eccentricity minima, when precession-driven variations in local insolation were minimal, obliquity-driven changes in the summer latitudinal insolation gradient became dominant. This hybrid monsoonal forcing concept explains orbitally-controlled tropical climate changes, incorporating the forcing mechanism of latitudinal gradients for the Pliocene, which probably increased in importance during subsequent Northern Hemisphere glaciations. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_875694 |
| institution | PANGAEA |
| language | en |
| publishDate | 2017 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Pliocene stable carbon and hydrogen isotopes of plant wax of ODP Site 108-659 Küchler, Rony R Dupont, Lydie M Schefuß, Enno 108-659; after Clemens (1999); AGE; Carbon Preference Index, n-Alkanes; COMPCORE; Composite Core; Corrected; Joides Resolution; Leg108; n-Alkane C29, δ13C; n-Alkane C29, δ13C, standard deviation; n-Alkane C29, δD; n-Alkane C29, δD, standard deviation; n-Alkane C31, δ13C; n-Alkane C31, δ13C, standard deviation; n-Alkane C31, δD; n-Alkane C31, δD, standard deviation; n-Alkane C33, δ13C; n-Alkane C33, δ13C, standard deviation; n-Alkane C33, δD; n-Alkane C33, δD, standard deviation; n-Alkanes C27-C35, per unit sediment mass; North Atlantic Ocean; Ocean Drilling Program; ODP; Sample code/label The Pliocene is regarded as a potential analogue for future climate with conditions generally warmer-than-today and higher-than-preindustrial atmospheric CO2 levels. Here we present the first orbitally resolved records of continental hydrology and vegetation changes from West Africa for two Pliocene time intervals (5.0-4.6 Ma, 3.6-3.0 Ma). Our results indicate that changes in local insolation alone are insufficient to explain the full degree of hydrologic variations. Generally two modes of interacting insolation forcings are observed: during eccentricity maxima, when precession was strong, the West African monsoon was driven by summer insolation; during eccentricity minima, when precession-driven variations in local insolation were minimal, obliquity-driven changes in the summer latitudinal insolation gradient became dominant. This hybrid monsoonal forcing concept explains orbitally-controlled tropical climate changes, incorporating the forcing mechanism of latitudinal gradients for the Pliocene, which probably increased in importance during subsequent Northern Hemisphere glaciations. |
| title | Pliocene stable carbon and hydrogen isotopes of plant wax of ODP Site 108-659 |
| topic | 108-659; after Clemens (1999); AGE; Carbon Preference Index, n-Alkanes; COMPCORE; Composite Core; Corrected; Joides Resolution; Leg108; n-Alkane C29, δ13C; n-Alkane C29, δ13C, standard deviation; n-Alkane C29, δD; n-Alkane C29, δD, standard deviation; n-Alkane C31, δ13C; n-Alkane C31, δ13C, standard deviation; n-Alkane C31, δD; n-Alkane C31, δD, standard deviation; n-Alkane C33, δ13C; n-Alkane C33, δ13C, standard deviation; n-Alkane C33, δD; n-Alkane C33, δD, standard deviation; n-Alkanes C27-C35, per unit sediment mass; North Atlantic Ocean; Ocean Drilling Program; ODP; Sample code/label |
| url | https://doi.org/10.1594/PANGAEA.875694 |