Last interglacial (MIS 5e) surface water conditions at the Vøring Plateau (Norwegian Sea), based on dinoflagellate cysts
Sediments from the last interglacial, marine isotope stage 5e (MIS 5e), have been studied for their dinoflagellate cyst content in a core retrieved from the Vøring Plateau, Norwegian Sea. Qualitative and quantitative analyses of the data, and comparison with the surface sample and published Holocene...
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Norwegian Polar Institute
2008
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ftjpolarres:oai:journals.openacademia.net:article/2882 2023-05-15T14:24:18+02:00 Last interglacial (MIS 5e) surface water conditions at the Vøring Plateau (Norwegian Sea), based on dinoflagellate cysts Van Nieuwenhove, Nicolas Bauch, Henning A. 2008-08-01 application/pdf https://polarresearch.net/index.php/polar/article/view/2882 https://doi.org/10.3402/polar.v27i2.6175 eng eng Norwegian Polar Institute https://polarresearch.net/index.php/polar/article/view/2882/6509 https://polarresearch.net/index.php/polar/article/view/2882 doi:10.3402/polar.v27i2.6175 Copyright (c) 2018 Polar Research Polar Research; Vol. 27 No. 2 (2008): Special issue: Arctic Palaeoclimate and its Extremes (APEX); 175-186 1751-8369 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2008 ftjpolarres https://doi.org/10.3402/polar.v27i2.6175 2021-11-11T19:13:21Z Sediments from the last interglacial, marine isotope stage 5e (MIS 5e), have been studied for their dinoflagellate cyst content in a core retrieved from the Vøring Plateau, Norwegian Sea. Qualitative and quantitative analyses of the data, and comparison with the surface sample and published Holocene data from the core, reveal distinct differences in hydrological surface conditions between the late Holocene and MIS 5e. A higher number of co-dominant, subordinate species in the last interglacial samples suggests there was a more pronounced seasonality of the surface water at this time. This is supported by the significant presence of Bitectatodinium tepikiense, a species that was virtually absent from the area for most of the Holocene. The seasonality signal is further substantiated by transfer-function reconstructions, which also indicates a stronger stratification of the upper water column during MIS 5e. Moreover, the assemblage data clearly show that optimal, fully marine interglacial conditions prevailed only late in MIS 5e (between ca. 117.5 and 116.5 Kya), which is in contrast with the climatic optimum early in the Holocene. Stable oxygen isotope values from planktic foraminifera for this MIS 5e optimum are comparable with the average Holocene values, but are generally ca. 0.3‰ higher than those of the earlier part of the last interglacial (sensu stricto). These higher d18O values are likely to be the result of the enhanced and prolonged influence of Saalian deglacial meltwater, thus corroborating the existence of a quite differently structured sea surface, as suggested by the dinocyst data. Article in Journal/Newspaper Arctic Norwegian Sea Polar Research Polar Research (E-Journal) Norwegian Sea Vøring Plateau ENVELOPE(4.000,4.000,67.000,67.000) Kya ENVELOPE(8.308,8.308,63.772,63.772) Polar Research 27 2 |
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Open Polar |
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Polar Research (E-Journal) |
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ftjpolarres |
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English |
description |
Sediments from the last interglacial, marine isotope stage 5e (MIS 5e), have been studied for their dinoflagellate cyst content in a core retrieved from the Vøring Plateau, Norwegian Sea. Qualitative and quantitative analyses of the data, and comparison with the surface sample and published Holocene data from the core, reveal distinct differences in hydrological surface conditions between the late Holocene and MIS 5e. A higher number of co-dominant, subordinate species in the last interglacial samples suggests there was a more pronounced seasonality of the surface water at this time. This is supported by the significant presence of Bitectatodinium tepikiense, a species that was virtually absent from the area for most of the Holocene. The seasonality signal is further substantiated by transfer-function reconstructions, which also indicates a stronger stratification of the upper water column during MIS 5e. Moreover, the assemblage data clearly show that optimal, fully marine interglacial conditions prevailed only late in MIS 5e (between ca. 117.5 and 116.5 Kya), which is in contrast with the climatic optimum early in the Holocene. Stable oxygen isotope values from planktic foraminifera for this MIS 5e optimum are comparable with the average Holocene values, but are generally ca. 0.3‰ higher than those of the earlier part of the last interglacial (sensu stricto). These higher d18O values are likely to be the result of the enhanced and prolonged influence of Saalian deglacial meltwater, thus corroborating the existence of a quite differently structured sea surface, as suggested by the dinocyst data. |
format |
Article in Journal/Newspaper |
author |
Van Nieuwenhove, Nicolas Bauch, Henning A. |
spellingShingle |
Van Nieuwenhove, Nicolas Bauch, Henning A. Last interglacial (MIS 5e) surface water conditions at the Vøring Plateau (Norwegian Sea), based on dinoflagellate cysts |
author_facet |
Van Nieuwenhove, Nicolas Bauch, Henning A. |
author_sort |
Van Nieuwenhove, Nicolas |
title |
Last interglacial (MIS 5e) surface water conditions at the Vøring Plateau (Norwegian Sea), based on dinoflagellate cysts |
title_short |
Last interglacial (MIS 5e) surface water conditions at the Vøring Plateau (Norwegian Sea), based on dinoflagellate cysts |
title_full |
Last interglacial (MIS 5e) surface water conditions at the Vøring Plateau (Norwegian Sea), based on dinoflagellate cysts |
title_fullStr |
Last interglacial (MIS 5e) surface water conditions at the Vøring Plateau (Norwegian Sea), based on dinoflagellate cysts |
title_full_unstemmed |
Last interglacial (MIS 5e) surface water conditions at the Vøring Plateau (Norwegian Sea), based on dinoflagellate cysts |
title_sort |
last interglacial (mis 5e) surface water conditions at the vøring plateau (norwegian sea), based on dinoflagellate cysts |
publisher |
Norwegian Polar Institute |
publishDate |
2008 |
url |
https://polarresearch.net/index.php/polar/article/view/2882 https://doi.org/10.3402/polar.v27i2.6175 |
long_lat |
ENVELOPE(4.000,4.000,67.000,67.000) ENVELOPE(8.308,8.308,63.772,63.772) |
geographic |
Norwegian Sea Vøring Plateau Kya |
geographic_facet |
Norwegian Sea Vøring Plateau Kya |
genre |
Arctic Norwegian Sea Polar Research |
genre_facet |
Arctic Norwegian Sea Polar Research |
op_source |
Polar Research; Vol. 27 No. 2 (2008): Special issue: Arctic Palaeoclimate and its Extremes (APEX); 175-186 1751-8369 |
op_relation |
https://polarresearch.net/index.php/polar/article/view/2882/6509 https://polarresearch.net/index.php/polar/article/view/2882 doi:10.3402/polar.v27i2.6175 |
op_rights |
Copyright (c) 2018 Polar Research |
op_doi |
https://doi.org/10.3402/polar.v27i2.6175 |
container_title |
Polar Research |
container_volume |
27 |
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2 |
_version_ |
1766296731822063616 |