Active North Atlantic deepwater formation during Heinrich Stadial 1
Deepwater circulation significantly changed during the last deglaciation from a shallow to a deep-reaching overturning cell. This change went along with a drawdown of isotopically light waters into the abyss and a deep ocean warming that changed deep ocean stratification from a salinity-to a tempera...
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ftethz:oai:www.research-collection.ethz.ch:20.500.11850/505317 2023-05-15T16:51:18+02:00 Active North Atlantic deepwater formation during Heinrich Stadial 1 Repschläger, Janne Zhao, Ning Rand, Devin Lisiecki, Lorraine Muglia, Juan Mulitza, Stefan Schmittner, Andreas Cartapanis, Olivier Bauch, Henning A. Schiebel, Ralf Haug, Gerald H. 2021-10-15 application/application/pdf https://hdl.handle.net/20.500.11850/505317 https://doi.org/10.3929/ethz-b-000505317 en eng Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.quascirev.2021.107145 info:eu-repo/semantics/altIdentifier/wos/000703094700003 http://hdl.handle.net/20.500.11850/505317 doi:10.3929/ethz-b-000505317 info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by-nc-nd/4.0/ Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International CC-BY-NC-ND Quaternary Science Reviews, 270 Quaternary Paleoceanography North Atlantic Data compilation stable isotopes info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2021 ftethz https://doi.org/20.500.11850/505317 https://doi.org/10.3929/ethz-b-000505317 https://doi.org/10.1016/j.quascirev.2021.107145 2022-04-25T14:33:43Z Deepwater circulation significantly changed during the last deglaciation from a shallow to a deep-reaching overturning cell. This change went along with a drawdown of isotopically light waters into the abyss and a deep ocean warming that changed deep ocean stratification from a salinity-to a temperature-controlled mode. Yet, the exact mechanisms causing these changes are still unknown. Furthermore, the long-standing idea of a complete shutdown of North Atlantic deepwater formation during Heinrich Stadial 1 (HS1) (17.5–14.6 kyr BP) remains prevalent. Here, we present a new compilation of benthic δ13C and δ18O data from the North Atlantic at high temporal resolution with consistent age models, established as part of the international PAGES working group OC3, to investigate deepwater properties in the North Atlantic. The extensive compilation, which includes 105 sediment cores, reveals different water masses during HS1. A water mass with heavy δ13C and δ18O signature occupies the Iceland Basin, whereas between 20 and 50°N, a distinct tongue of 18O depleted, 13C enriched water reaches down to 4000 m water depths. The heavy δ13C signature indicates active deepwater formation in the North Atlantic during HS1. Differences in its δ18O signature indicate either different sources or an alteration of the deepwater on its southward pathway. Based on these results, we discuss concepts of deepwater formation in the North Atlantic that help to explain the deglacial change from a salinity-driven to a temperature-driven circulation mode. ISSN:0277-3791 Article in Journal/Newspaper Iceland North Atlantic ETH Zürich Research Collection |
institution |
Open Polar |
collection |
ETH Zürich Research Collection |
op_collection_id |
ftethz |
language |
English |
topic |
Quaternary Paleoceanography North Atlantic Data compilation stable isotopes |
spellingShingle |
Quaternary Paleoceanography North Atlantic Data compilation stable isotopes Repschläger, Janne Zhao, Ning Rand, Devin Lisiecki, Lorraine Muglia, Juan Mulitza, Stefan Schmittner, Andreas Cartapanis, Olivier Bauch, Henning A. Schiebel, Ralf Haug, Gerald H. Active North Atlantic deepwater formation during Heinrich Stadial 1 |
topic_facet |
Quaternary Paleoceanography North Atlantic Data compilation stable isotopes |
description |
Deepwater circulation significantly changed during the last deglaciation from a shallow to a deep-reaching overturning cell. This change went along with a drawdown of isotopically light waters into the abyss and a deep ocean warming that changed deep ocean stratification from a salinity-to a temperature-controlled mode. Yet, the exact mechanisms causing these changes are still unknown. Furthermore, the long-standing idea of a complete shutdown of North Atlantic deepwater formation during Heinrich Stadial 1 (HS1) (17.5–14.6 kyr BP) remains prevalent. Here, we present a new compilation of benthic δ13C and δ18O data from the North Atlantic at high temporal resolution with consistent age models, established as part of the international PAGES working group OC3, to investigate deepwater properties in the North Atlantic. The extensive compilation, which includes 105 sediment cores, reveals different water masses during HS1. A water mass with heavy δ13C and δ18O signature occupies the Iceland Basin, whereas between 20 and 50°N, a distinct tongue of 18O depleted, 13C enriched water reaches down to 4000 m water depths. The heavy δ13C signature indicates active deepwater formation in the North Atlantic during HS1. Differences in its δ18O signature indicate either different sources or an alteration of the deepwater on its southward pathway. Based on these results, we discuss concepts of deepwater formation in the North Atlantic that help to explain the deglacial change from a salinity-driven to a temperature-driven circulation mode. ISSN:0277-3791 |
format |
Article in Journal/Newspaper |
author |
Repschläger, Janne Zhao, Ning Rand, Devin Lisiecki, Lorraine Muglia, Juan Mulitza, Stefan Schmittner, Andreas Cartapanis, Olivier Bauch, Henning A. Schiebel, Ralf Haug, Gerald H. |
author_facet |
Repschläger, Janne Zhao, Ning Rand, Devin Lisiecki, Lorraine Muglia, Juan Mulitza, Stefan Schmittner, Andreas Cartapanis, Olivier Bauch, Henning A. Schiebel, Ralf Haug, Gerald H. |
author_sort |
Repschläger, Janne |
title |
Active North Atlantic deepwater formation during Heinrich Stadial 1 |
title_short |
Active North Atlantic deepwater formation during Heinrich Stadial 1 |
title_full |
Active North Atlantic deepwater formation during Heinrich Stadial 1 |
title_fullStr |
Active North Atlantic deepwater formation during Heinrich Stadial 1 |
title_full_unstemmed |
Active North Atlantic deepwater formation during Heinrich Stadial 1 |
title_sort |
active north atlantic deepwater formation during heinrich stadial 1 |
publisher |
Elsevier |
publishDate |
2021 |
url |
https://hdl.handle.net/20.500.11850/505317 https://doi.org/10.3929/ethz-b-000505317 |
genre |
Iceland North Atlantic |
genre_facet |
Iceland North Atlantic |
op_source |
Quaternary Science Reviews, 270 |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.quascirev.2021.107145 info:eu-repo/semantics/altIdentifier/wos/000703094700003 http://hdl.handle.net/20.500.11850/505317 doi:10.3929/ethz-b-000505317 |
op_rights |
info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by-nc-nd/4.0/ Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International |
op_rightsnorm |
CC-BY-NC-ND |
op_doi |
https://doi.org/20.500.11850/505317 https://doi.org/10.3929/ethz-b-000505317 https://doi.org/10.1016/j.quascirev.2021.107145 |
_version_ |
1766041412914118656 |