Independent tephrochronological evidence for rapid and synchronous oceanic and atmospheric temperature rises over the Greenland stadial-interstadial transitions between ca. 32 and 40 ka b2k
Understanding the dynamics that drove past abrupt climate changes, such as the Dansgaard-Oeschger (DO) events, depends on combined proxy evidence from disparate archives. To identify leads, lags and synchronicity between different climate system components, independent and robust chronologies are re...
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ftnorce:oai:norceresearch.brage.unit.no:11250/2726914 2023-05-15T16:26:17+02:00 Independent tephrochronological evidence for rapid and synchronous oceanic and atmospheric temperature rises over the Greenland stadial-interstadial transitions between ca. 32 and 40 ka b2k Berben, Sarah Miche Patricia Dokken, Trond Martin Abbott, Peter M. Cook, Eliza Sadatzki, Henrik Simon, Margit Hildegard Jansen, Eystein 2020 application/pdf https://hdl.handle.net/11250/2726914 https://doi.org/10.1016/j.quascirev.2020.106277 eng eng urn:issn:0277-3791 https://hdl.handle.net/11250/2726914 https://doi.org/10.1016/j.quascirev.2020.106277 cristin:1885953 Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no © 2020, Authors CC-BY Quaternary Science Reviews 236 Journal article Peer reviewed 2020 ftnorce https://doi.org/10.1016/j.quascirev.2020.106277 2022-10-13T05:50:34Z Understanding the dynamics that drove past abrupt climate changes, such as the Dansgaard-Oeschger (DO) events, depends on combined proxy evidence from disparate archives. To identify leads, lags and synchronicity between different climate system components, independent and robust chronologies are required. Cryptotephrochronology is a key geochronological tool as cryptotephra horizons can act as isochrons linking disparate and/or distant records. Here, we investigated marine sediment core MD99-2284 from the Norwegian Sea to look for previously identified Greenland ice core cryptotephra horizons and define time-parallel markers between the archives. We explored potential secondary transport and depositional mechanisms that could hamper the isochronous integrity of such horizons. We identified six cryptotephra layers of which four correlate to previously known Greenland ice core horizons. None of those were identified in other marine cores and thus, this study contributes greatly to the North Atlantic tephra framework tripling the original amount of existing isochrons between ca. 25 and 60 ka b2k. The latter allow a synchronization between MD99-2284 and the Greenland ice cores between ca. 32 e40 ka b2k, which is, in the North Atlantic, the shortest time-interval during the Last Glacial Period to be constrained by four independent tephra isochrons. These findings provide essential tephra-based evidence for synchronous and rapid oceanic and atmospheric temperature rises during the Greenland Stadial-Interstadial transitions. Furthermore, it enables us to estimate the average peak-duration of interstadial temperature overshoots at approximately 136 years. As such, this well-targeted high-resolution investigation successfully demonstrates the use of cryptotephra for geochronological purposes in the marine realm. publishedVersion Article in Journal/Newspaper Greenland Greenland ice core Greenland ice cores ice core North Atlantic Norwegian Sea NORCE vitenarkiv (Norwegian Research Centre) Greenland Norwegian Sea Quaternary Science Reviews 236 106277 |
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Open Polar |
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NORCE vitenarkiv (Norwegian Research Centre) |
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ftnorce |
language |
English |
description |
Understanding the dynamics that drove past abrupt climate changes, such as the Dansgaard-Oeschger (DO) events, depends on combined proxy evidence from disparate archives. To identify leads, lags and synchronicity between different climate system components, independent and robust chronologies are required. Cryptotephrochronology is a key geochronological tool as cryptotephra horizons can act as isochrons linking disparate and/or distant records. Here, we investigated marine sediment core MD99-2284 from the Norwegian Sea to look for previously identified Greenland ice core cryptotephra horizons and define time-parallel markers between the archives. We explored potential secondary transport and depositional mechanisms that could hamper the isochronous integrity of such horizons. We identified six cryptotephra layers of which four correlate to previously known Greenland ice core horizons. None of those were identified in other marine cores and thus, this study contributes greatly to the North Atlantic tephra framework tripling the original amount of existing isochrons between ca. 25 and 60 ka b2k. The latter allow a synchronization between MD99-2284 and the Greenland ice cores between ca. 32 e40 ka b2k, which is, in the North Atlantic, the shortest time-interval during the Last Glacial Period to be constrained by four independent tephra isochrons. These findings provide essential tephra-based evidence for synchronous and rapid oceanic and atmospheric temperature rises during the Greenland Stadial-Interstadial transitions. Furthermore, it enables us to estimate the average peak-duration of interstadial temperature overshoots at approximately 136 years. As such, this well-targeted high-resolution investigation successfully demonstrates the use of cryptotephra for geochronological purposes in the marine realm. publishedVersion |
format |
Article in Journal/Newspaper |
author |
Berben, Sarah Miche Patricia Dokken, Trond Martin Abbott, Peter M. Cook, Eliza Sadatzki, Henrik Simon, Margit Hildegard Jansen, Eystein |
spellingShingle |
Berben, Sarah Miche Patricia Dokken, Trond Martin Abbott, Peter M. Cook, Eliza Sadatzki, Henrik Simon, Margit Hildegard Jansen, Eystein Independent tephrochronological evidence for rapid and synchronous oceanic and atmospheric temperature rises over the Greenland stadial-interstadial transitions between ca. 32 and 40 ka b2k |
author_facet |
Berben, Sarah Miche Patricia Dokken, Trond Martin Abbott, Peter M. Cook, Eliza Sadatzki, Henrik Simon, Margit Hildegard Jansen, Eystein |
author_sort |
Berben, Sarah Miche Patricia |
title |
Independent tephrochronological evidence for rapid and synchronous oceanic and atmospheric temperature rises over the Greenland stadial-interstadial transitions between ca. 32 and 40 ka b2k |
title_short |
Independent tephrochronological evidence for rapid and synchronous oceanic and atmospheric temperature rises over the Greenland stadial-interstadial transitions between ca. 32 and 40 ka b2k |
title_full |
Independent tephrochronological evidence for rapid and synchronous oceanic and atmospheric temperature rises over the Greenland stadial-interstadial transitions between ca. 32 and 40 ka b2k |
title_fullStr |
Independent tephrochronological evidence for rapid and synchronous oceanic and atmospheric temperature rises over the Greenland stadial-interstadial transitions between ca. 32 and 40 ka b2k |
title_full_unstemmed |
Independent tephrochronological evidence for rapid and synchronous oceanic and atmospheric temperature rises over the Greenland stadial-interstadial transitions between ca. 32 and 40 ka b2k |
title_sort |
independent tephrochronological evidence for rapid and synchronous oceanic and atmospheric temperature rises over the greenland stadial-interstadial transitions between ca. 32 and 40 ka b2k |
publishDate |
2020 |
url |
https://hdl.handle.net/11250/2726914 https://doi.org/10.1016/j.quascirev.2020.106277 |
geographic |
Greenland Norwegian Sea |
geographic_facet |
Greenland Norwegian Sea |
genre |
Greenland Greenland ice core Greenland ice cores ice core North Atlantic Norwegian Sea |
genre_facet |
Greenland Greenland ice core Greenland ice cores ice core North Atlantic Norwegian Sea |
op_source |
Quaternary Science Reviews 236 |
op_relation |
urn:issn:0277-3791 https://hdl.handle.net/11250/2726914 https://doi.org/10.1016/j.quascirev.2020.106277 cristin:1885953 |
op_rights |
Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no © 2020, Authors |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1016/j.quascirev.2020.106277 |
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Quaternary Science Reviews |
container_volume |
236 |
container_start_page |
106277 |
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1766015188923842560 |