Palynological record and radiocarbon dates for sediment core T89-16, Congo River mouth
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| Auteurs principaux: | , , , , |
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| Format: | Dataset Open Access |
| Langue: | en |
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PANGAEA
2001
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| _version_ | 1867168561438392320 |
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| author | Marret, Fabienne Scourse, James D Versteegh, Gerard J M Jansen, J H Fred Schneider, Ralph R |
| author_facet | Marret, Fabienne Scourse, James D Versteegh, Gerard J M Jansen, J H Fred Schneider, Ralph R |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | We present a high-resolution reconstruction of tropical palaeoenvironmental changes for the last deglacial transition (18 to 9 cal. kyr BP) based on integrated oceanic and terrestrial proxies from a Congo fan core. Pollen, grass cuticle, Pediastrum and dinoflagellate cyst fluxes, sedimentation rates and planktonic foraminiferal d18O ratios, uK37 sea-surface temperature and alkane/alkenone ratio data highlight a series of abrupt changes in Congo River palaeodischarge. A major discharge pulse is registered at around 13.0 cal. kyr BP which we attribute to latitudinal migration of the Intertropical Convergence Zone (ITCZ) during deglaciation. The data indicate abrupt and short-lived changes in the equatorial precipitation regime within a system of monsoonal dynamics forced by precessional cycles. The phases of enhanced Congo discharge stimulated river-induced upwelling and enhanced productivity in the adjacent ocean. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_787455 |
| institution | PANGAEA |
| language | en |
| publishDate | 2001 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Palynological record and radiocarbon dates for sediment core T89-16, Congo River mouth Marret, Fabienne Scourse, James D Versteegh, Gerard J M Jansen, J H Fred Schneider, Ralph R NIOZ89; PC; Piston corer; Southeast Atlantic; T89-16; T89-16-PC; Tyro We present a high-resolution reconstruction of tropical palaeoenvironmental changes for the last deglacial transition (18 to 9 cal. kyr BP) based on integrated oceanic and terrestrial proxies from a Congo fan core. Pollen, grass cuticle, Pediastrum and dinoflagellate cyst fluxes, sedimentation rates and planktonic foraminiferal d18O ratios, uK37 sea-surface temperature and alkane/alkenone ratio data highlight a series of abrupt changes in Congo River palaeodischarge. A major discharge pulse is registered at around 13.0 cal. kyr BP which we attribute to latitudinal migration of the Intertropical Convergence Zone (ITCZ) during deglaciation. The data indicate abrupt and short-lived changes in the equatorial precipitation regime within a system of monsoonal dynamics forced by precessional cycles. The phases of enhanced Congo discharge stimulated river-induced upwelling and enhanced productivity in the adjacent ocean. |
| title | Palynological record and radiocarbon dates for sediment core T89-16, Congo River mouth |
| topic | NIOZ89; PC; Piston corer; Southeast Atlantic; T89-16; T89-16-PC; Tyro |
| url | https://doi.org/10.1594/PANGAEA.787455 |