Comparison of glacial and interglacial conditions between the polar and the subpolar North Atlantic Region over the past five climate cycles
A multiparameter-based interpretation of sediment records from the northeast Atlantic and the western Nordic seas suggests that during the last 500,000 years only in marine isotopes stage (MIS) 11, 5e, and 1 were there somewhat comparable interglacial boundary conditions in both regions, i.e., stron...
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Language: | English |
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AGU (American Geophysical Union)
2003
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Online Access: | https://oceanrep.geomar.de/id/eprint/6241/ https://oceanrep.geomar.de/id/eprint/6241/1/2003_Helmke-Bauch_Comparison_Paleoceanoraphy-18.pdf https://doi.org/10.1029/2002PA000794 |
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ftoceanrep:oai:oceanrep.geomar.de:6241 2023-05-15T17:24:20+02:00 Comparison of glacial and interglacial conditions between the polar and the subpolar North Atlantic Region over the past five climate cycles Helmke, Jan P. Bauch, Henning A. 2003 text https://oceanrep.geomar.de/id/eprint/6241/ https://oceanrep.geomar.de/id/eprint/6241/1/2003_Helmke-Bauch_Comparison_Paleoceanoraphy-18.pdf https://doi.org/10.1029/2002PA000794 en eng AGU (American Geophysical Union) https://oceanrep.geomar.de/id/eprint/6241/1/2003_Helmke-Bauch_Comparison_Paleoceanoraphy-18.pdf Helmke, J. P. and Bauch, H. A. (2003) Comparison of glacial and interglacial conditions between the polar and the subpolar North Atlantic Region over the past five climate cycles. Open Access Paleoceanography, 18 (2). p. 1036. DOI 10.1029/2002PA000794 <https://doi.org/10.1029/2002PA000794>. doi:10.1029/2002PA000794 info:eu-repo/semantics/openAccess Article PeerReviewed 2003 ftoceanrep https://doi.org/10.1029/2002PA000794 2023-04-07T14:52:35Z A multiparameter-based interpretation of sediment records from the northeast Atlantic and the western Nordic seas suggests that during the last 500,000 years only in marine isotopes stage (MIS) 11, 5e, and 1 were there somewhat comparable interglacial boundary conditions in both regions, i.e., strongly reduced occurrence of iceberg-rafted debris (IRD) and high carbonate bioproductivity. Although the northeast Atlantic experienced such conditions during all peak interglaciations, with the exception of MIS 7, planktic foraminiferal δ18O from this region would still indicate that significantly colder sea surface temperatures (SST) prevailed during MIS 11 than during MIS 9, 5e, and 1. This assumption is corroborated by a continuous input of IRD into the western Nordic seas during MIS 11, implying a much steeper SST gradient between the polar and subpolar region and an overall reduced thermohaline activity in the polar latitudes. The iceberg proxy also reveals that maximum IRD discharge always happened during the final phase of glaciation and into early deglaciation (terminations). As these IRD records from the two regions are characterized by a high time coherency, it is concluded that short-term variability is a persistent feature of the glacial climate system. Article in Journal/Newspaper Nordic Seas North Atlantic Northeast Atlantic OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Paleoceanography 18 2 n/a n/a |
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Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
op_collection_id |
ftoceanrep |
language |
English |
description |
A multiparameter-based interpretation of sediment records from the northeast Atlantic and the western Nordic seas suggests that during the last 500,000 years only in marine isotopes stage (MIS) 11, 5e, and 1 were there somewhat comparable interglacial boundary conditions in both regions, i.e., strongly reduced occurrence of iceberg-rafted debris (IRD) and high carbonate bioproductivity. Although the northeast Atlantic experienced such conditions during all peak interglaciations, with the exception of MIS 7, planktic foraminiferal δ18O from this region would still indicate that significantly colder sea surface temperatures (SST) prevailed during MIS 11 than during MIS 9, 5e, and 1. This assumption is corroborated by a continuous input of IRD into the western Nordic seas during MIS 11, implying a much steeper SST gradient between the polar and subpolar region and an overall reduced thermohaline activity in the polar latitudes. The iceberg proxy also reveals that maximum IRD discharge always happened during the final phase of glaciation and into early deglaciation (terminations). As these IRD records from the two regions are characterized by a high time coherency, it is concluded that short-term variability is a persistent feature of the glacial climate system. |
format |
Article in Journal/Newspaper |
author |
Helmke, Jan P. Bauch, Henning A. |
spellingShingle |
Helmke, Jan P. Bauch, Henning A. Comparison of glacial and interglacial conditions between the polar and the subpolar North Atlantic Region over the past five climate cycles |
author_facet |
Helmke, Jan P. Bauch, Henning A. |
author_sort |
Helmke, Jan P. |
title |
Comparison of glacial and interglacial conditions between the polar and the subpolar North Atlantic Region over the past five climate cycles |
title_short |
Comparison of glacial and interglacial conditions between the polar and the subpolar North Atlantic Region over the past five climate cycles |
title_full |
Comparison of glacial and interglacial conditions between the polar and the subpolar North Atlantic Region over the past five climate cycles |
title_fullStr |
Comparison of glacial and interglacial conditions between the polar and the subpolar North Atlantic Region over the past five climate cycles |
title_full_unstemmed |
Comparison of glacial and interglacial conditions between the polar and the subpolar North Atlantic Region over the past five climate cycles |
title_sort |
comparison of glacial and interglacial conditions between the polar and the subpolar north atlantic region over the past five climate cycles |
publisher |
AGU (American Geophysical Union) |
publishDate |
2003 |
url |
https://oceanrep.geomar.de/id/eprint/6241/ https://oceanrep.geomar.de/id/eprint/6241/1/2003_Helmke-Bauch_Comparison_Paleoceanoraphy-18.pdf https://doi.org/10.1029/2002PA000794 |
genre |
Nordic Seas North Atlantic Northeast Atlantic |
genre_facet |
Nordic Seas North Atlantic Northeast Atlantic |
op_relation |
https://oceanrep.geomar.de/id/eprint/6241/1/2003_Helmke-Bauch_Comparison_Paleoceanoraphy-18.pdf Helmke, J. P. and Bauch, H. A. (2003) Comparison of glacial and interglacial conditions between the polar and the subpolar North Atlantic Region over the past five climate cycles. Open Access Paleoceanography, 18 (2). p. 1036. DOI 10.1029/2002PA000794 <https://doi.org/10.1029/2002PA000794>. doi:10.1029/2002PA000794 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1029/2002PA000794 |
container_title |
Paleoceanography |
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18 |
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2 |
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1766115288937398272 |