Abundance of organic-walled dinoflagellate cysts of sediment core GeoB3603-2
Here, we reconstruct the varying influence of the Agulhas Current (AgC), the South Atlantic Current and the Antarctic Circumpolar Current on the Agulhas Retroflection (AgR) in the eastern South Atlantic Ocean for the last 160,000 years on the basis of the dinoflagellate cysts, pollen and spores pres...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.58937 2023-05-15T14:04:42+02:00 Abundance of organic-walled dinoflagellate cysts of sediment core GeoB3603-2 Esper, Oliver Versteegh, Gerard J M Zonneveld, Karin A F Willems, Helmut LATITUDE: -35.125000 * LONGITUDE: 17.543333 * DATE/TIME START: 1996-01-04T00:00:00 * DATE/TIME END: 1996-01-04T00:00:00 * MINIMUM DEPTH, sediment/rock: 0.025 m * MAXIMUM DEPTH, sediment/rock: 4.975 m 2004-04-16 text/tab-separated-values, 5400 data points https://doi.pangaea.de/10.1594/PANGAEA.58937 https://doi.org/10.1594/PANGAEA.58937 en eng PANGAEA Esper, Oliver (2001): Reconstruction of Recent and Late Quaternary oceanographic conditions in the Eastern South Atlantic Ocean based on calcareous- and organic-walled dinoflagellate cysts. Berichte aus dem Fachbereich Geowissenschaften der Universität Bremen, 189, 130 pp, urn:nbn:de:gbv:46-ep000103156 https://doi.pangaea.de/10.1594/PANGAEA.58937 https://doi.org/10.1594/PANGAEA.58937 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Esper, Oliver; Versteegh, Gerard J M; Zonneveld, Karin A F; Willems, Helmut (2004): A palynological reconstruction of the Agulhas Retroflection (South Atlantic Ocean) during the Late Quaternary. Global and Planetary Change, 41, 31-62, https://doi.org/10.1016/j.gloplacha.2003.10.002 Bitectatodinium spongium Bitectatodinium tepikiense Brigantedinium Brigantedinium cariacoense Brigantedinium simplex Counting palynology Dalella chathamensis DEPTH sediment/rock Dinoflagellate cyst indeterminata Dinoflagellate cyst reworked Echinidinium aculeatum Echinidinium delicatum Echinidinium granulatum Echinidinium spp. Echinidinium transparantum GeoB GeoB3603-2 Geosciences University of Bremen Gravity corer (Kiel type) Impagidinium aculeatum Impagidinium pallidum Impagidinium paradoxum Impagidinium patulum Impagidinium plicatum Impagidinium sp. Impagidinium sphaericum Impagidinium strialatum Impagidinium variaseptum Impagidinium velorum Lingulodinium machaerophorum long M34/1 Meteor (1986) Multispinula quanta Nematosphaeropsis labyrinthus Operculodinium israelianum long Operculodinium israelianum short Operculodinium janduchenei Pentapharsodinium dalei Pollen taeniate bisaccate indeterminata total Polykrikos kofoidii Polyspaeridium zoharyi Protoceratium reticulatum long Protoceratium reticulatum short Dataset 2004 ftpangaea https://doi.org/10.1594/PANGAEA.58937 https://doi.org/10.1016/j.gloplacha.2003.10.002 2023-01-20T07:36:25Z Here, we reconstruct the varying influence of the Agulhas Current (AgC), the South Atlantic Current and the Antarctic Circumpolar Current on the Agulhas Retroflection (AgR) in the eastern South Atlantic Ocean for the last 160,000 years on the basis of the dinoflagellate cysts, pollen and spores present in a sediment core (GeoB 3603-2) from the southeastern Cape Basin offshore South Africa, where the Agulhas Current enters the Atlantic Ocean. Our analyses reveal strong orbital forcing on the heat exchange between the Indian Ocean and the South Atlantic Ocean during the Late Quaternary. Maxima in local productivity appear to be primarily related to a strengthening of the ocean circulation as a result of the high seasonal contrast during precession maxima. During precession minima, seasonal contrast was low and stratified, oligo- to mesotrophic conditions prevailed, notably when these minima coincided with the glacial terminations. The clear presence of periodicities on a sub-Milankovitch scale as well as modulations of the primary frequencies demonstrate that the Agulhas Retroflection furthermore is modulated substantially by complex interactions between the subtropical, 'precession-driven', climate and ocean circulation systems, and the southern, 'obliquity-driven', high latitudes. Dataset Antarc* Antarctic South Atlantic Ocean PANGAEA - Data Publisher for Earth & Environmental Science Antarctic Indian The Antarctic ENVELOPE(17.543333,17.543333,-35.125000,-35.125000) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
Bitectatodinium spongium Bitectatodinium tepikiense Brigantedinium Brigantedinium cariacoense Brigantedinium simplex Counting palynology Dalella chathamensis DEPTH sediment/rock Dinoflagellate cyst indeterminata Dinoflagellate cyst reworked Echinidinium aculeatum Echinidinium delicatum Echinidinium granulatum Echinidinium spp. Echinidinium transparantum GeoB GeoB3603-2 Geosciences University of Bremen Gravity corer (Kiel type) Impagidinium aculeatum Impagidinium pallidum Impagidinium paradoxum Impagidinium patulum Impagidinium plicatum Impagidinium sp. Impagidinium sphaericum Impagidinium strialatum Impagidinium variaseptum Impagidinium velorum Lingulodinium machaerophorum long M34/1 Meteor (1986) Multispinula quanta Nematosphaeropsis labyrinthus Operculodinium israelianum long Operculodinium israelianum short Operculodinium janduchenei Pentapharsodinium dalei Pollen taeniate bisaccate indeterminata total Polykrikos kofoidii Polyspaeridium zoharyi Protoceratium reticulatum long Protoceratium reticulatum short |
spellingShingle |
Bitectatodinium spongium Bitectatodinium tepikiense Brigantedinium Brigantedinium cariacoense Brigantedinium simplex Counting palynology Dalella chathamensis DEPTH sediment/rock Dinoflagellate cyst indeterminata Dinoflagellate cyst reworked Echinidinium aculeatum Echinidinium delicatum Echinidinium granulatum Echinidinium spp. Echinidinium transparantum GeoB GeoB3603-2 Geosciences University of Bremen Gravity corer (Kiel type) Impagidinium aculeatum Impagidinium pallidum Impagidinium paradoxum Impagidinium patulum Impagidinium plicatum Impagidinium sp. Impagidinium sphaericum Impagidinium strialatum Impagidinium variaseptum Impagidinium velorum Lingulodinium machaerophorum long M34/1 Meteor (1986) Multispinula quanta Nematosphaeropsis labyrinthus Operculodinium israelianum long Operculodinium israelianum short Operculodinium janduchenei Pentapharsodinium dalei Pollen taeniate bisaccate indeterminata total Polykrikos kofoidii Polyspaeridium zoharyi Protoceratium reticulatum long Protoceratium reticulatum short Esper, Oliver Versteegh, Gerard J M Zonneveld, Karin A F Willems, Helmut Abundance of organic-walled dinoflagellate cysts of sediment core GeoB3603-2 |
topic_facet |
Bitectatodinium spongium Bitectatodinium tepikiense Brigantedinium Brigantedinium cariacoense Brigantedinium simplex Counting palynology Dalella chathamensis DEPTH sediment/rock Dinoflagellate cyst indeterminata Dinoflagellate cyst reworked Echinidinium aculeatum Echinidinium delicatum Echinidinium granulatum Echinidinium spp. Echinidinium transparantum GeoB GeoB3603-2 Geosciences University of Bremen Gravity corer (Kiel type) Impagidinium aculeatum Impagidinium pallidum Impagidinium paradoxum Impagidinium patulum Impagidinium plicatum Impagidinium sp. Impagidinium sphaericum Impagidinium strialatum Impagidinium variaseptum Impagidinium velorum Lingulodinium machaerophorum long M34/1 Meteor (1986) Multispinula quanta Nematosphaeropsis labyrinthus Operculodinium israelianum long Operculodinium israelianum short Operculodinium janduchenei Pentapharsodinium dalei Pollen taeniate bisaccate indeterminata total Polykrikos kofoidii Polyspaeridium zoharyi Protoceratium reticulatum long Protoceratium reticulatum short |
description |
Here, we reconstruct the varying influence of the Agulhas Current (AgC), the South Atlantic Current and the Antarctic Circumpolar Current on the Agulhas Retroflection (AgR) in the eastern South Atlantic Ocean for the last 160,000 years on the basis of the dinoflagellate cysts, pollen and spores present in a sediment core (GeoB 3603-2) from the southeastern Cape Basin offshore South Africa, where the Agulhas Current enters the Atlantic Ocean. Our analyses reveal strong orbital forcing on the heat exchange between the Indian Ocean and the South Atlantic Ocean during the Late Quaternary. Maxima in local productivity appear to be primarily related to a strengthening of the ocean circulation as a result of the high seasonal contrast during precession maxima. During precession minima, seasonal contrast was low and stratified, oligo- to mesotrophic conditions prevailed, notably when these minima coincided with the glacial terminations. The clear presence of periodicities on a sub-Milankovitch scale as well as modulations of the primary frequencies demonstrate that the Agulhas Retroflection furthermore is modulated substantially by complex interactions between the subtropical, 'precession-driven', climate and ocean circulation systems, and the southern, 'obliquity-driven', high latitudes. |
format |
Dataset |
author |
Esper, Oliver Versteegh, Gerard J M Zonneveld, Karin A F Willems, Helmut |
author_facet |
Esper, Oliver Versteegh, Gerard J M Zonneveld, Karin A F Willems, Helmut |
author_sort |
Esper, Oliver |
title |
Abundance of organic-walled dinoflagellate cysts of sediment core GeoB3603-2 |
title_short |
Abundance of organic-walled dinoflagellate cysts of sediment core GeoB3603-2 |
title_full |
Abundance of organic-walled dinoflagellate cysts of sediment core GeoB3603-2 |
title_fullStr |
Abundance of organic-walled dinoflagellate cysts of sediment core GeoB3603-2 |
title_full_unstemmed |
Abundance of organic-walled dinoflagellate cysts of sediment core GeoB3603-2 |
title_sort |
abundance of organic-walled dinoflagellate cysts of sediment core geob3603-2 |
publisher |
PANGAEA |
publishDate |
2004 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.58937 https://doi.org/10.1594/PANGAEA.58937 |
op_coverage |
LATITUDE: -35.125000 * LONGITUDE: 17.543333 * DATE/TIME START: 1996-01-04T00:00:00 * DATE/TIME END: 1996-01-04T00:00:00 * MINIMUM DEPTH, sediment/rock: 0.025 m * MAXIMUM DEPTH, sediment/rock: 4.975 m |
long_lat |
ENVELOPE(17.543333,17.543333,-35.125000,-35.125000) |
geographic |
Antarctic Indian The Antarctic |
geographic_facet |
Antarctic Indian The Antarctic |
genre |
Antarc* Antarctic South Atlantic Ocean |
genre_facet |
Antarc* Antarctic South Atlantic Ocean |
op_source |
Supplement to: Esper, Oliver; Versteegh, Gerard J M; Zonneveld, Karin A F; Willems, Helmut (2004): A palynological reconstruction of the Agulhas Retroflection (South Atlantic Ocean) during the Late Quaternary. Global and Planetary Change, 41, 31-62, https://doi.org/10.1016/j.gloplacha.2003.10.002 |
op_relation |
Esper, Oliver (2001): Reconstruction of Recent and Late Quaternary oceanographic conditions in the Eastern South Atlantic Ocean based on calcareous- and organic-walled dinoflagellate cysts. Berichte aus dem Fachbereich Geowissenschaften der Universität Bremen, 189, 130 pp, urn:nbn:de:gbv:46-ep000103156 https://doi.pangaea.de/10.1594/PANGAEA.58937 https://doi.org/10.1594/PANGAEA.58937 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/PANGAEA.58937 https://doi.org/10.1016/j.gloplacha.2003.10.002 |
_version_ |
1766275951292841984 |