Reprint of: Evaluation of past stratification changes in the Nordic Seas by comparing planktonic foraminiferal δ18O with a solar-forced model
Density changes in the upper water column of the northern North Atlantic may enhance or reduce vertical convection of surface water with profound effects on meridional overturning and climate in the wider region. This study tests the capability of paired delta O-18 values of two planktonic foraminif...
Published in: | Marine Micropaleontology |
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Online Access: | https://oceanrep.geomar.de/id/eprint/21604/ https://oceanrep.geomar.de/id/eprint/21604/1/1-s2.0-S0377839813000261-main.pdf https://doi.org/10.1016/j.marmicro.2013.03.009 |
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ftoceanrep:oai:oceanrep.geomar.de:21604 2023-05-15T15:08:46+02:00 Reprint of: Evaluation of past stratification changes in the Nordic Seas by comparing planktonic foraminiferal δ18O with a solar-forced model Simstich, Johannes Lorenz, Stephan J. Bauch, Henning A. 2013 text https://oceanrep.geomar.de/id/eprint/21604/ https://oceanrep.geomar.de/id/eprint/21604/1/1-s2.0-S0377839813000261-main.pdf https://doi.org/10.1016/j.marmicro.2013.03.009 en eng Elsevier https://oceanrep.geomar.de/id/eprint/21604/1/1-s2.0-S0377839813000261-main.pdf Simstich, J., Lorenz, S. J. and Bauch, H. A. (2013) Reprint of: Evaluation of past stratification changes in the Nordic Seas by comparing planktonic foraminiferal δ18O with a solar-forced model. Marine Micropaleontology, 99 . pp. 45-50. DOI 10.1016/j.marmicro.2013.03.009 <https://doi.org/10.1016/j.marmicro.2013.03.009>. doi:10.1016/j.marmicro.2013.03.009 info:eu-repo/semantics/restrictedAccess Article PeerReviewed 2013 ftoceanrep https://doi.org/10.1016/j.marmicro.2013.03.009 2023-04-07T15:09:49Z Density changes in the upper water column of the northern North Atlantic may enhance or reduce vertical convection of surface water with profound effects on meridional overturning and climate in the wider region. This study tests the capability of paired delta O-18 values of two planktonic foraminiferal species - Neogloboquadrina pachyderma (s) and Turborotalita quinqueloba - for the reconstruction of near-surface density stratification in high latitudes or the glacial ocean. Foraminiferal data from two sediment cores of crucial areas of the Nordic Seas were compared with insolation-induced thermal stratification changes as obtained by simulations with the general circulation model ECHO-G. The comparison suggests that insolation was the chief mechanism to change thermocline strength during most of the Holocene. Prior to that, stratification depended by and large on the varying amounts of meltwater injected at the sea surface. Similar to the modern central Arctic Ocean, a pronounced and thick halocline prevented surface waters from deep convection in the central Nordic Seas. Parts of the Norwegian Sea, however, were also stratified but more analogous to the modern Greenland Sea, where deep convection can occur in late winter as a result of the density increase upon a combination of cold temperatures and wind stress. Our findings thus support previous results of an active meridional overturning also in a glacial ocean Article in Journal/Newspaper Arctic Arctic Ocean Foraminifera* Greenland Greenland Sea Neogloboquadrina pachyderma Nordic Seas North Atlantic Norwegian Sea OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Arctic Arctic Ocean Greenland Norwegian Sea Marine Micropaleontology 99 45 50 |
institution |
Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
op_collection_id |
ftoceanrep |
language |
English |
description |
Density changes in the upper water column of the northern North Atlantic may enhance or reduce vertical convection of surface water with profound effects on meridional overturning and climate in the wider region. This study tests the capability of paired delta O-18 values of two planktonic foraminiferal species - Neogloboquadrina pachyderma (s) and Turborotalita quinqueloba - for the reconstruction of near-surface density stratification in high latitudes or the glacial ocean. Foraminiferal data from two sediment cores of crucial areas of the Nordic Seas were compared with insolation-induced thermal stratification changes as obtained by simulations with the general circulation model ECHO-G. The comparison suggests that insolation was the chief mechanism to change thermocline strength during most of the Holocene. Prior to that, stratification depended by and large on the varying amounts of meltwater injected at the sea surface. Similar to the modern central Arctic Ocean, a pronounced and thick halocline prevented surface waters from deep convection in the central Nordic Seas. Parts of the Norwegian Sea, however, were also stratified but more analogous to the modern Greenland Sea, where deep convection can occur in late winter as a result of the density increase upon a combination of cold temperatures and wind stress. Our findings thus support previous results of an active meridional overturning also in a glacial ocean |
format |
Article in Journal/Newspaper |
author |
Simstich, Johannes Lorenz, Stephan J. Bauch, Henning A. |
spellingShingle |
Simstich, Johannes Lorenz, Stephan J. Bauch, Henning A. Reprint of: Evaluation of past stratification changes in the Nordic Seas by comparing planktonic foraminiferal δ18O with a solar-forced model |
author_facet |
Simstich, Johannes Lorenz, Stephan J. Bauch, Henning A. |
author_sort |
Simstich, Johannes |
title |
Reprint of: Evaluation of past stratification changes in the Nordic Seas by comparing planktonic foraminiferal δ18O with a solar-forced model |
title_short |
Reprint of: Evaluation of past stratification changes in the Nordic Seas by comparing planktonic foraminiferal δ18O with a solar-forced model |
title_full |
Reprint of: Evaluation of past stratification changes in the Nordic Seas by comparing planktonic foraminiferal δ18O with a solar-forced model |
title_fullStr |
Reprint of: Evaluation of past stratification changes in the Nordic Seas by comparing planktonic foraminiferal δ18O with a solar-forced model |
title_full_unstemmed |
Reprint of: Evaluation of past stratification changes in the Nordic Seas by comparing planktonic foraminiferal δ18O with a solar-forced model |
title_sort |
reprint of: evaluation of past stratification changes in the nordic seas by comparing planktonic foraminiferal δ18o with a solar-forced model |
publisher |
Elsevier |
publishDate |
2013 |
url |
https://oceanrep.geomar.de/id/eprint/21604/ https://oceanrep.geomar.de/id/eprint/21604/1/1-s2.0-S0377839813000261-main.pdf https://doi.org/10.1016/j.marmicro.2013.03.009 |
geographic |
Arctic Arctic Ocean Greenland Norwegian Sea |
geographic_facet |
Arctic Arctic Ocean Greenland Norwegian Sea |
genre |
Arctic Arctic Ocean Foraminifera* Greenland Greenland Sea Neogloboquadrina pachyderma Nordic Seas North Atlantic Norwegian Sea |
genre_facet |
Arctic Arctic Ocean Foraminifera* Greenland Greenland Sea Neogloboquadrina pachyderma Nordic Seas North Atlantic Norwegian Sea |
op_relation |
https://oceanrep.geomar.de/id/eprint/21604/1/1-s2.0-S0377839813000261-main.pdf Simstich, J., Lorenz, S. J. and Bauch, H. A. (2013) Reprint of: Evaluation of past stratification changes in the Nordic Seas by comparing planktonic foraminiferal δ18O with a solar-forced model. Marine Micropaleontology, 99 . pp. 45-50. DOI 10.1016/j.marmicro.2013.03.009 <https://doi.org/10.1016/j.marmicro.2013.03.009>. doi:10.1016/j.marmicro.2013.03.009 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1016/j.marmicro.2013.03.009 |
container_title |
Marine Micropaleontology |
container_volume |
99 |
container_start_page |
45 |
op_container_end_page |
50 |
_version_ |
1766340066921152512 |