Abundance of calcareous dinoflagellates of sediment cores from the South Atlantic Ocean

DOI

Despite the increasing interest in the South Atlantic Ocean as a key area of the heat exchange between the southern and the northern hemisphere, information about its palaeoceanographic conditions during transitions from glacial to interglacial stages, the so-called Terminations, are not well understood. Herein we attempt to increase this information by studying the calcareous dinoflagellate cysts and the shells of Thoracosphaera heimii (calcareous cysts) of five Late Quaternary South Atlantic Ocean cores. Extremely high accumulation rates of calcareous cysts at the Terminations might be due to a combined effect of increased cyst production and better preservation as result of calm, oligotrophic conditions in the upper water layers. Low relative abundance of Sphaerodinella albatrosiana compared with Sphaerodinella tuberosa in the Cape Basin may be the result of the relatively colder environmental conditions in this region compared with the equatorial Atlantic Ocean with high relative abundance of S. albatrosiana. Furthermore, the predominance of S. tuberosa during glacials and interglacials at the observed site of the western Atlantic Ocean reflects decreased salinity in the upper water layer.

For data of sediment core GeoB1105-4 see Höll et al. (1998) dataset: doi:10.1594/PANGAEA.55381, sediment core GeoB2204-2 see Höll et al. (1999) dataset: doi:10.1594/PANGAEA.55382

Supplement to: Esper, Oliver; Zonneveld, Karin A F; Höll, Christine; Karwath, Britta; Schneider, Ralph R; Vink, Annemiek; Weise-Ihlo, Ilka; Willems, Helmut (2000): Reconstruction of palaeoceanographic conditions in the South Atlantic Ocean at the last two Terminations based on calcareous dinoflagllate cysts. International Journal of Earth Sciences, 88(4), 680-693

Identifier
DOI https://doi.org/10.1594/PANGAEA.603886
Related Identifier https://doi.org/10.1007/s005310050297
Related Identifier https://nbn-resolving.org/urn:nbn:de:gbv:46-ep000103156
Metadata Access https://ws.pangaea.de/oai/provider?verb=GetRecord&metadataPrefix=datacite4&identifier=oai:pangaea.de:doi:10.1594/PANGAEA.603886
Provenance
Creator Esper, Oliver ORCID logo; Zonneveld, Karin A F ORCID logo; Höll, Christine; Karwath, Britta; Schneider, Ralph R ORCID logo; Vink, Annemiek ORCID logo; Weise-Ihlo, Ilka; Willems, Helmut
Publisher PANGAEA
Publication Year 2000
Rights Creative Commons Attribution 3.0 Unported; https://creativecommons.org/licenses/by/3.0/
OpenAccess true
Representation
Language English
Resource Type Supplementary Publication Series of Datasets; Collection
Format application/zip
Size 3 datasets
Discipline Geosciences; Natural Sciences
Spatial Coverage (-14.897W, -35.125S, 17.543E, -3.815N); Equatorial Atlantic; Brazil Basin; Cape Basin; Southern Cape Basin
Temporal Coverage Begin 1989-03-05T00:00:00Z
Temporal Coverage End 1996-01-04T00:00:00Z