A "critical" climatic evaluation of last interglacial (MIS 5e) records from the Norwegian Sea
Sediment cores from the Norwegian Sea were studied to evaluate interglacial climate conditions of the marine isotope stage 5e (MIS 5e). Using planktic forminiferal assemblages as the core method, a detailed picture of the evolution of surface water conditions was derived. According to our age model,...
Published in: | Polar Research |
---|---|
Main Authors: | , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Co-action Publishing
2008
|
Subjects: | |
Online Access: | https://archimer.ifremer.fr/doc/00237/34811/33316.pdf https://doi.org/10.1111/j.1751-8369.2008.00059.x https://archimer.ifremer.fr/doc/00237/34811/ |
id |
ftarchimer:oai:archimer.ifremer.fr:34811 |
---|---|
record_format |
openpolar |
spelling |
ftarchimer:oai:archimer.ifremer.fr:34811 2023-05-15T15:11:00+02:00 A "critical" climatic evaluation of last interglacial (MIS 5e) records from the Norwegian Sea Bauch, Henning A. Erlenkeuser, Helmut 2008-08 application/pdf https://archimer.ifremer.fr/doc/00237/34811/33316.pdf https://doi.org/10.1111/j.1751-8369.2008.00059.x https://archimer.ifremer.fr/doc/00237/34811/ eng eng Co-action Publishing https://archimer.ifremer.fr/doc/00237/34811/33316.pdf doi:10.1111/j.1751-8369.2008.00059.x https://archimer.ifremer.fr/doc/00237/34811/ 2008 The Authors info:eu-repo/semantics/openAccess restricted use Polar Research (0800-0395) (Co-action Publishing), 2008-08 , Vol. 27 , N. 2 , P. 135-151 Holocene last interglacial Nordic seas palaeoceanography planktic foraminifers stable isotopes text Publication info:eu-repo/semantics/article 2008 ftarchimer https://doi.org/10.1111/j.1751-8369.2008.00059.x 2021-09-23T20:25:26Z Sediment cores from the Norwegian Sea were studied to evaluate interglacial climate conditions of the marine isotope stage 5e (MIS 5e). Using planktic forminiferal assemblages as the core method, a detailed picture of the evolution of surface water conditions was derived. According to our age model, a step-like deglaciation of the Saalian ice sheets is noted between ca. 135 and 124.5 Kya, but the deglaciation shows little response with regard to surface ocean warming. From then on, the rapidly increasing abundance of subpolar forminifers, concomitant with decreasing iceberg indicators, provides evidence for the development of interglacial conditions sensu stricto (5e-ss), a period that lasted for about 9 Ky. As interpreted from the foraminiferal records, and supported by the other proxies, this interval of 5e-ss was in two parts: showing an early warm phase, but with a fresher, i.e., lower salinity, water mass, and a subsequent cooling phase that lasted until ca. 118.5 Kya. After this time, the climatic optimum with the most intense advection of Atlantic surface water masses occurred until ca. 116 Kya. A rapid transition with two notable climatic perturbations is observed subsequently during the glacial inception. Overall, the peak warmth of the last interglacial period occurred relatively late after deglaciation, and at no time did it reach the high warmth level of the early Holocene. This finding must be considered when using the last interglacial situation as an analogue model for enhanced meridional transfer of ocean heat to the Arctic, with the prospect of a future warmer climate. Article in Journal/Newspaper Arctic Foraminifera* Iceberg* Nordic Seas Norwegian Sea Polar Research Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) Arctic Kya ENVELOPE(8.308,8.308,63.772,63.772) Norwegian Sea Polar Research 27 2 135 151 |
institution |
Open Polar |
collection |
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) |
op_collection_id |
ftarchimer |
language |
English |
topic |
Holocene last interglacial Nordic seas palaeoceanography planktic foraminifers stable isotopes |
spellingShingle |
Holocene last interglacial Nordic seas palaeoceanography planktic foraminifers stable isotopes Bauch, Henning A. Erlenkeuser, Helmut A "critical" climatic evaluation of last interglacial (MIS 5e) records from the Norwegian Sea |
topic_facet |
Holocene last interglacial Nordic seas palaeoceanography planktic foraminifers stable isotopes |
description |
Sediment cores from the Norwegian Sea were studied to evaluate interglacial climate conditions of the marine isotope stage 5e (MIS 5e). Using planktic forminiferal assemblages as the core method, a detailed picture of the evolution of surface water conditions was derived. According to our age model, a step-like deglaciation of the Saalian ice sheets is noted between ca. 135 and 124.5 Kya, but the deglaciation shows little response with regard to surface ocean warming. From then on, the rapidly increasing abundance of subpolar forminifers, concomitant with decreasing iceberg indicators, provides evidence for the development of interglacial conditions sensu stricto (5e-ss), a period that lasted for about 9 Ky. As interpreted from the foraminiferal records, and supported by the other proxies, this interval of 5e-ss was in two parts: showing an early warm phase, but with a fresher, i.e., lower salinity, water mass, and a subsequent cooling phase that lasted until ca. 118.5 Kya. After this time, the climatic optimum with the most intense advection of Atlantic surface water masses occurred until ca. 116 Kya. A rapid transition with two notable climatic perturbations is observed subsequently during the glacial inception. Overall, the peak warmth of the last interglacial period occurred relatively late after deglaciation, and at no time did it reach the high warmth level of the early Holocene. This finding must be considered when using the last interglacial situation as an analogue model for enhanced meridional transfer of ocean heat to the Arctic, with the prospect of a future warmer climate. |
format |
Article in Journal/Newspaper |
author |
Bauch, Henning A. Erlenkeuser, Helmut |
author_facet |
Bauch, Henning A. Erlenkeuser, Helmut |
author_sort |
Bauch, Henning A. |
title |
A "critical" climatic evaluation of last interglacial (MIS 5e) records from the Norwegian Sea |
title_short |
A "critical" climatic evaluation of last interglacial (MIS 5e) records from the Norwegian Sea |
title_full |
A "critical" climatic evaluation of last interglacial (MIS 5e) records from the Norwegian Sea |
title_fullStr |
A "critical" climatic evaluation of last interglacial (MIS 5e) records from the Norwegian Sea |
title_full_unstemmed |
A "critical" climatic evaluation of last interglacial (MIS 5e) records from the Norwegian Sea |
title_sort |
"critical" climatic evaluation of last interglacial (mis 5e) records from the norwegian sea |
publisher |
Co-action Publishing |
publishDate |
2008 |
url |
https://archimer.ifremer.fr/doc/00237/34811/33316.pdf https://doi.org/10.1111/j.1751-8369.2008.00059.x https://archimer.ifremer.fr/doc/00237/34811/ |
long_lat |
ENVELOPE(8.308,8.308,63.772,63.772) |
geographic |
Arctic Kya Norwegian Sea |
geographic_facet |
Arctic Kya Norwegian Sea |
genre |
Arctic Foraminifera* Iceberg* Nordic Seas Norwegian Sea Polar Research |
genre_facet |
Arctic Foraminifera* Iceberg* Nordic Seas Norwegian Sea Polar Research |
op_source |
Polar Research (0800-0395) (Co-action Publishing), 2008-08 , Vol. 27 , N. 2 , P. 135-151 |
op_relation |
https://archimer.ifremer.fr/doc/00237/34811/33316.pdf doi:10.1111/j.1751-8369.2008.00059.x https://archimer.ifremer.fr/doc/00237/34811/ |
op_rights |
2008 The Authors info:eu-repo/semantics/openAccess restricted use |
op_doi |
https://doi.org/10.1111/j.1751-8369.2008.00059.x |
container_title |
Polar Research |
container_volume |
27 |
container_issue |
2 |
container_start_page |
135 |
op_container_end_page |
151 |
_version_ |
1766341921488240640 |