Late Holocene coccolith assemblage data of sediment core GeoB8323-2 from the Benguela Upwelling System, supplement to: Weiser, Jens; Baumann, Karl-Heinz; Hahn, Annette; Zabel, Matthias (2016): Late Holocene paleoceanographic changes off south-western Africa as inferred from coccolithophore assemblages, Proc. 15th INA Conf., Bohol, Philippines. Journal of Nannoplankton Research, 36(2), 161-171
Coccolith occurrences in sediment core GeoB 8323-2, from the Benguela Upwelling System off south-western Africa, were analysed to reconstruct the temporal changes in surface water conditions, upwelling intensity and associated productivity during the late Holocene (last 2.25ka BP). Absolute numbers...
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ftdatacite:10.1594/pangaea.867495 2023-05-15T14:04:24+02:00 Late Holocene coccolith assemblage data of sediment core GeoB8323-2 from the Benguela Upwelling System, supplement to: Weiser, Jens; Baumann, Karl-Heinz; Hahn, Annette; Zabel, Matthias (2016): Late Holocene paleoceanographic changes off south-western Africa as inferred from coccolithophore assemblages, Proc. 15th INA Conf., Bohol, Philippines. Journal of Nannoplankton Research, 36(2), 161-171 Weiser, Jens Baumann, Karl-Heinz Hahn, Annette Zabel, Matthias 2016 text/tab-separated-values https://dx.doi.org/10.1594/pangaea.867495 https://doi.pangaea.de/10.1594/PANGAEA.867495 en eng PANGAEA - Data Publisher for Earth & Environmental Science Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 CC-BY DEPTH, sediment/rock AGE Coccolithus braarudii Coccolithus pelagicus Calcidiscus leptoporus Calcidiscus quadriperforatus Emiliania huxleyi Gephyrocapsa muellerae Gephyrocapsa ericsonii Gephyrocapsa oceanica Florisphaera profunda Syracosphaera spp. Coccolithophoridae, other Coccolithophoridae, total Gravity corer Kiel type M57/1 Meteor 1986 Center for Marine Environmental Sciences MARUM Geosciences, University of Bremen GeoB Regional Archives for Integrated iNvestigations RAiN Dataset dataset Supplementary Dataset 2016 ftdatacite https://doi.org/10.1594/pangaea.867495 2022-02-09T12:06:21Z Coccolith occurrences in sediment core GeoB 8323-2, from the Benguela Upwelling System off south-western Africa, were analysed to reconstruct the temporal changes in surface water conditions, upwelling intensity and associated productivity during the late Holocene (last 2.25ka BP). Absolute numbers of total coccolithophores are low throughout the core, reaching a maximum of 320 x 10^6 coccoliths/gram sediment around 770 years BP. Despite the low abundance of coccoliths, coherent patterns of a changing assemblage composition can be identified. These suggest a consistent paleoceanographic development of highly variable Late Holocene environmental change during the last three millennia. Phases of decreased upwelling in the Benguela Upwelling System are indicated by elevated abundances of Florisphaera profunda alongside reduced occurrence of Coccolithus pelagicus and C. braarudii from 2.25-2.00ka BP, ~ 1.00ka BP and during the last 200 years, also accompanied by a reduced species diversity. Sea surface temperatures estimated with a Gephyrocapsa-based transfer function are in the order of 18-20°C. These phases are intersected by periods of colder sea surface temperatures of 16-17°C and increased productivity, as indicated by an opposing trend for the aforementioned species. Given the climatological and oceanographical complexity of the area, deciphering a single driving mechanism for these changes proves difficult. Synchronous changes in the Antarctic sea ice extent, however, give credit to the conceptual model of latitudinal migration of the westerly wind belt and its interaction with the south-easterly trade winds as an important driver for oceanographic changes in the area. Dataset Antarc* Antarctic Sea ice DataCite Metadata Store (German National Library of Science and Technology) Antarctic The Antarctic |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
English |
topic |
DEPTH, sediment/rock AGE Coccolithus braarudii Coccolithus pelagicus Calcidiscus leptoporus Calcidiscus quadriperforatus Emiliania huxleyi Gephyrocapsa muellerae Gephyrocapsa ericsonii Gephyrocapsa oceanica Florisphaera profunda Syracosphaera spp. Coccolithophoridae, other Coccolithophoridae, total Gravity corer Kiel type M57/1 Meteor 1986 Center for Marine Environmental Sciences MARUM Geosciences, University of Bremen GeoB Regional Archives for Integrated iNvestigations RAiN |
spellingShingle |
DEPTH, sediment/rock AGE Coccolithus braarudii Coccolithus pelagicus Calcidiscus leptoporus Calcidiscus quadriperforatus Emiliania huxleyi Gephyrocapsa muellerae Gephyrocapsa ericsonii Gephyrocapsa oceanica Florisphaera profunda Syracosphaera spp. Coccolithophoridae, other Coccolithophoridae, total Gravity corer Kiel type M57/1 Meteor 1986 Center for Marine Environmental Sciences MARUM Geosciences, University of Bremen GeoB Regional Archives for Integrated iNvestigations RAiN Weiser, Jens Baumann, Karl-Heinz Hahn, Annette Zabel, Matthias Late Holocene coccolith assemblage data of sediment core GeoB8323-2 from the Benguela Upwelling System, supplement to: Weiser, Jens; Baumann, Karl-Heinz; Hahn, Annette; Zabel, Matthias (2016): Late Holocene paleoceanographic changes off south-western Africa as inferred from coccolithophore assemblages, Proc. 15th INA Conf., Bohol, Philippines. Journal of Nannoplankton Research, 36(2), 161-171 |
topic_facet |
DEPTH, sediment/rock AGE Coccolithus braarudii Coccolithus pelagicus Calcidiscus leptoporus Calcidiscus quadriperforatus Emiliania huxleyi Gephyrocapsa muellerae Gephyrocapsa ericsonii Gephyrocapsa oceanica Florisphaera profunda Syracosphaera spp. Coccolithophoridae, other Coccolithophoridae, total Gravity corer Kiel type M57/1 Meteor 1986 Center for Marine Environmental Sciences MARUM Geosciences, University of Bremen GeoB Regional Archives for Integrated iNvestigations RAiN |
description |
Coccolith occurrences in sediment core GeoB 8323-2, from the Benguela Upwelling System off south-western Africa, were analysed to reconstruct the temporal changes in surface water conditions, upwelling intensity and associated productivity during the late Holocene (last 2.25ka BP). Absolute numbers of total coccolithophores are low throughout the core, reaching a maximum of 320 x 10^6 coccoliths/gram sediment around 770 years BP. Despite the low abundance of coccoliths, coherent patterns of a changing assemblage composition can be identified. These suggest a consistent paleoceanographic development of highly variable Late Holocene environmental change during the last three millennia. Phases of decreased upwelling in the Benguela Upwelling System are indicated by elevated abundances of Florisphaera profunda alongside reduced occurrence of Coccolithus pelagicus and C. braarudii from 2.25-2.00ka BP, ~ 1.00ka BP and during the last 200 years, also accompanied by a reduced species diversity. Sea surface temperatures estimated with a Gephyrocapsa-based transfer function are in the order of 18-20°C. These phases are intersected by periods of colder sea surface temperatures of 16-17°C and increased productivity, as indicated by an opposing trend for the aforementioned species. Given the climatological and oceanographical complexity of the area, deciphering a single driving mechanism for these changes proves difficult. Synchronous changes in the Antarctic sea ice extent, however, give credit to the conceptual model of latitudinal migration of the westerly wind belt and its interaction with the south-easterly trade winds as an important driver for oceanographic changes in the area. |
format |
Dataset |
author |
Weiser, Jens Baumann, Karl-Heinz Hahn, Annette Zabel, Matthias |
author_facet |
Weiser, Jens Baumann, Karl-Heinz Hahn, Annette Zabel, Matthias |
author_sort |
Weiser, Jens |
title |
Late Holocene coccolith assemblage data of sediment core GeoB8323-2 from the Benguela Upwelling System, supplement to: Weiser, Jens; Baumann, Karl-Heinz; Hahn, Annette; Zabel, Matthias (2016): Late Holocene paleoceanographic changes off south-western Africa as inferred from coccolithophore assemblages, Proc. 15th INA Conf., Bohol, Philippines. Journal of Nannoplankton Research, 36(2), 161-171 |
title_short |
Late Holocene coccolith assemblage data of sediment core GeoB8323-2 from the Benguela Upwelling System, supplement to: Weiser, Jens; Baumann, Karl-Heinz; Hahn, Annette; Zabel, Matthias (2016): Late Holocene paleoceanographic changes off south-western Africa as inferred from coccolithophore assemblages, Proc. 15th INA Conf., Bohol, Philippines. Journal of Nannoplankton Research, 36(2), 161-171 |
title_full |
Late Holocene coccolith assemblage data of sediment core GeoB8323-2 from the Benguela Upwelling System, supplement to: Weiser, Jens; Baumann, Karl-Heinz; Hahn, Annette; Zabel, Matthias (2016): Late Holocene paleoceanographic changes off south-western Africa as inferred from coccolithophore assemblages, Proc. 15th INA Conf., Bohol, Philippines. Journal of Nannoplankton Research, 36(2), 161-171 |
title_fullStr |
Late Holocene coccolith assemblage data of sediment core GeoB8323-2 from the Benguela Upwelling System, supplement to: Weiser, Jens; Baumann, Karl-Heinz; Hahn, Annette; Zabel, Matthias (2016): Late Holocene paleoceanographic changes off south-western Africa as inferred from coccolithophore assemblages, Proc. 15th INA Conf., Bohol, Philippines. Journal of Nannoplankton Research, 36(2), 161-171 |
title_full_unstemmed |
Late Holocene coccolith assemblage data of sediment core GeoB8323-2 from the Benguela Upwelling System, supplement to: Weiser, Jens; Baumann, Karl-Heinz; Hahn, Annette; Zabel, Matthias (2016): Late Holocene paleoceanographic changes off south-western Africa as inferred from coccolithophore assemblages, Proc. 15th INA Conf., Bohol, Philippines. Journal of Nannoplankton Research, 36(2), 161-171 |
title_sort |
late holocene coccolith assemblage data of sediment core geob8323-2 from the benguela upwelling system, supplement to: weiser, jens; baumann, karl-heinz; hahn, annette; zabel, matthias (2016): late holocene paleoceanographic changes off south-western africa as inferred from coccolithophore assemblages, proc. 15th ina conf., bohol, philippines. journal of nannoplankton research, 36(2), 161-171 |
publisher |
PANGAEA - Data Publisher for Earth & Environmental Science |
publishDate |
2016 |
url |
https://dx.doi.org/10.1594/pangaea.867495 https://doi.pangaea.de/10.1594/PANGAEA.867495 |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic Sea ice |
genre_facet |
Antarc* Antarctic Sea ice |
op_rights |
Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/pangaea.867495 |
_version_ |
1766275481892552704 |