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Marret, Fabienne; Scourse, James D; Versteegh, Gerard J M; Jansen, J H Fred; Schneider, Ralph R (2001): Palynological record and radiocarbon dates for sediment core T89-16, Congo River mouth [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.787455, Supplement to: Marret, F et al. (2001): Integrated marine and terrestrial evidence for abrupt Congo River palaeodischarge fluctuations during the last deglaciation. Journal of Quaternary Science, 16(8), 761-766, https://doi.org/10.1002/jqs.646

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Abstract:
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.
Coverage:
Latitude: -5.703300 * Longitude: 11.235000
Date/Time Start: 1989-10-25T02:36:00 * Date/Time End: 1989-10-25T02:36:00
Event(s):
T89-16-PC (T89-16) * Latitude: -5.703300 * Longitude: 11.235000 * Date/Time: 1989-10-25T02:36:00 * Elevation: -824.0 m * Recovery: 8.57 m * Location: Southeast Atlantic * Campaign: NIOZ89 * Basis: Tyro * Method/Device: Piston corer (PC)
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
2 datasets

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Datasets listed in this publication series

  1. Marret, F; Scourse, JD; Versteegh, GJM et al. (2001): (Table 1) Radiocarbon dates for sediment core T89-16. https://doi.org/10.1594/PANGAEA.787454
  2. Marret, F; Scourse, JD; Versteegh, GJM et al. (2001): Pollen analysis of sediment core T89-16-PC. https://doi.org/10.1594/PANGAEA.626353