Organic-walled dinoflagellate cyst data of sediment core GeoB8323-2

• Main Authors: Zhao, Xueqin, Dupont, Lydie M, Schefuß, Enno, Granger, Robyn, Wefer, Gerold
• Format: Dataset
• Language: English
• Published: PANGAEA 2018
• Subjects: Age; Brigantedinium spp.; Center for Marine Environmental Sciences; Depth; bottom/max; sediment/rock; top/min; Dinoflagellate cyst; Dinoflagellate indeterminata; Dubridinium spp.; Echinidinium aculeatum; Echinidinium delicatum; Echinidinium granulatum; Echinidinium spp.; Echinidinium transparantum; Echinidinium zonneveldiae; GeoB8323-2; Gravity corer (Kiel type); Impagidinium spp.; Impagidinium variaseptum; Lejeunecysta oliva; Lejeunecysta paratenella; Lejeunecysta sabrina; Lejeunecysta spp.; Lingulodinium machaerophorum; Lycopodium; Lycopodium (added); M57/1; MARUM; Meteor (1986); Operculodinium centrocarpum; Operculodinium israelianum; Polykrikos kofoidii; Polykrikos schwartzii; Polysphaeridium zoharyi; Protoperidinium americanum; Protoperidinium monospinum; Quinquecuspis concreta; Selenopemphix nephroides; Selenopemphix quanta; SL; Spiniferites hyperacanthus; Spiniferites membranaceus; Spiniferites mirabilis; Spiniferites ramosus; Spiniferites spp.; Stelladinium robustum; Antarc*; Antarctic
• Online Access: https://doi.pangaea.de/10.1594/PANGAEA.886221; https://doi.org/10.1594/PANGAEA.886221

The southern Benguela upwelling system near the St Helena Bay has been proposed to be affected by various factors, while few investigations about the late-Holocene oceanic conditions has been carried out in this area. To determine the oceanic variability and its forcing mechanisms in the southern Benguela region during the late-Holocene, we examined organic-walled dinoflagellate cyst (dinocyst) records from two marine sediment cores located in the southernmost and central Benguela upwelling system. We compare our results with other proxies including alkenone-derived SSTs, grain size, and coccolithophore assemblages from the same samples. The results indicate a distinctive behavior between the southernmost Benguela system and the central Benguela area. We infer that the oceanic conditions in these two regions are primarily governed by an interplay of wind-induced upwelling, fluvial discharge, and advection of cold sub-Antarctic waters, which is consistent with the current understanding of the paleoclimate conditions in this area. However, the findings also suggest that the southernmost Benguela system also receives additional effects of warm and saline waters via the Agulhas leakage, which has a clear influence on the oceanic conditions in this area.