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...
Published in: | Quaternary Science Reviews |
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Main Authors: | , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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Elsevier
2021
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Online Access: | https://oceanrep.geomar.de/id/eprint/54129/ https://oceanrep.geomar.de/id/eprint/54129/1/1-s2.0-S0277379121003528-main.pdf https://oceanrep.geomar.de/id/eprint/54129/7/ScienceDirect_files_23Sep2021_11-08-05.038.zip https://doi.org/10.1016/j.quascirev.2021.107145 |
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ftoceanrep:oai:oceanrep.geomar.de:54129 2024-02-11T10:05:15+01:00 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 text archive https://oceanrep.geomar.de/id/eprint/54129/ https://oceanrep.geomar.de/id/eprint/54129/1/1-s2.0-S0277379121003528-main.pdf https://oceanrep.geomar.de/id/eprint/54129/7/ScienceDirect_files_23Sep2021_11-08-05.038.zip https://doi.org/10.1016/j.quascirev.2021.107145 en eng Elsevier https://oceanrep.geomar.de/id/eprint/54129/1/1-s2.0-S0277379121003528-main.pdf https://oceanrep.geomar.de/id/eprint/54129/7/ScienceDirect_files_23Sep2021_11-08-05.038.zip Repschläger, J., Zhao, N., Rand, D., Lisiecki, L., Muglia, J., Mulitza, S., Schmittner, A., Cartapanis, O., Bauch, H. A. , Schiebel, R. and Haug, G. H. (2021) Active North Atlantic deepwater formation during Heinrich Stadial 1. Open Access Quaternary Science Reviews, 270 . Art.Nr. 107145. DOI 10.1016/j.quascirev.2021.107145 <https://doi.org/10.1016/j.quascirev.2021.107145>. doi:10.1016/j.quascirev.2021.107145 cc_by_nc_nd_4.0 info:eu-repo/semantics/openAccess Article PeerReviewed 2021 ftoceanrep https://doi.org/10.1016/j.quascirev.2021.107145 2024-01-15T00:24:00Z 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. Highlights • Spatial analyses of benthic δ13C and δ18O data from OC3 Atlantic compilation for HS1. • Heavy δ13C, light δ18O waters migrated into deep western North Atlantic basin during HS1. • Active deepwater formation between 30 and 60°N in the North Atlantic during HS1. • New concepts for transport of isotopically light δ18O into deep ocean. • Major contribution of North Atlantic waters to deglacial deep ocean stratification changes. Article in Journal/Newspaper Iceland North Atlantic OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Quaternary Science Reviews 270 107145 |
institution |
Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
op_collection_id |
ftoceanrep |
language |
English |
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. Highlights • Spatial analyses of benthic δ13C and δ18O data from OC3 Atlantic compilation for HS1. • Heavy δ13C, light δ18O waters migrated into deep western North Atlantic basin during HS1. • Active deepwater formation between 30 and 60°N in the North Atlantic during HS1. • New concepts for transport of isotopically light δ18O into deep ocean. • Major contribution of North Atlantic waters to deglacial deep ocean stratification changes. |
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. |
spellingShingle |
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 |
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://oceanrep.geomar.de/id/eprint/54129/ https://oceanrep.geomar.de/id/eprint/54129/1/1-s2.0-S0277379121003528-main.pdf https://oceanrep.geomar.de/id/eprint/54129/7/ScienceDirect_files_23Sep2021_11-08-05.038.zip https://doi.org/10.1016/j.quascirev.2021.107145 |
genre |
Iceland North Atlantic |
genre_facet |
Iceland North Atlantic |
op_relation |
https://oceanrep.geomar.de/id/eprint/54129/1/1-s2.0-S0277379121003528-main.pdf https://oceanrep.geomar.de/id/eprint/54129/7/ScienceDirect_files_23Sep2021_11-08-05.038.zip Repschläger, J., Zhao, N., Rand, D., Lisiecki, L., Muglia, J., Mulitza, S., Schmittner, A., Cartapanis, O., Bauch, H. A. , Schiebel, R. and Haug, G. H. (2021) Active North Atlantic deepwater formation during Heinrich Stadial 1. Open Access Quaternary Science Reviews, 270 . Art.Nr. 107145. DOI 10.1016/j.quascirev.2021.107145 <https://doi.org/10.1016/j.quascirev.2021.107145>. doi:10.1016/j.quascirev.2021.107145 |
op_rights |
cc_by_nc_nd_4.0 info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1016/j.quascirev.2021.107145 |
container_title |
Quaternary Science Reviews |
container_volume |
270 |
container_start_page |
107145 |
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1790602161231495168 |