Carbon isotopes and PaĝTh response to forced circulation changes:a model perspective
Understanding the ocean circulation changes associated with abrupt climate events is key to better assessing climate variability and understanding its different natural modes. Sedimentary Pa=Th, benthic δ 13 C and Δ 114 C are common proxies used to reconstruct past circulation flow rate and ventilat...
Published in: | Climate of the Past |
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Language: | English |
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2020
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Online Access: | https://research.vu.nl/en/publications/f96f0fb8-3da6-4f16-9043-127724aa9e2e https://doi.org/10.5194/cp-16-867-2020 https://hdl.handle.net/1871.1/f96f0fb8-3da6-4f16-9043-127724aa9e2e http://www.scopus.com/inward/record.url?scp=85085376673&partnerID=8YFLogxK http://www.scopus.com/inward/citedby.url?scp=85085376673&partnerID=8YFLogxK |
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ftvuamstcris:oai:research.vu.nl:publications/f96f0fb8-3da6-4f16-9043-127724aa9e2e 2024-06-23T07:54:50+00:00 Carbon isotopes and PaĝTh response to forced circulation changes:a model perspective Missiaen, Lise Bouttes, Nathaelle Roche, Didier M. Dutay, Jean Claude Quiquet, Aurélien Waelbroeck, Claire Pichat, Sylvain Peterschmitt, Jean Yves 2020-05-19 https://research.vu.nl/en/publications/f96f0fb8-3da6-4f16-9043-127724aa9e2e https://doi.org/10.5194/cp-16-867-2020 https://hdl.handle.net/1871.1/f96f0fb8-3da6-4f16-9043-127724aa9e2e http://www.scopus.com/inward/record.url?scp=85085376673&partnerID=8YFLogxK http://www.scopus.com/inward/citedby.url?scp=85085376673&partnerID=8YFLogxK eng eng https://research.vu.nl/en/publications/f96f0fb8-3da6-4f16-9043-127724aa9e2e info:eu-repo/semantics/openAccess Missiaen , L , Bouttes , N , Roche , D M , Dutay , J C , Quiquet , A , Waelbroeck , C , Pichat , S & Peterschmitt , J Y 2020 , ' Carbon isotopes and PaĝTh response to forced circulation changes : a model perspective ' , Climate of the Past , vol. 16 , no. 3 , 867-2020 , pp. 867-883 . https://doi.org/10.5194/cp-16-867-2020 /dk/atira/pure/sustainabledevelopmentgoals/life_below_water name=SDG 14 - Life Below Water article 2020 ftvuamstcris https://doi.org/10.5194/cp-16-867-2020 2024-06-06T00:19:35Z Understanding the ocean circulation changes associated with abrupt climate events is key to better assessing climate variability and understanding its different natural modes. Sedimentary Pa=Th, benthic δ 13 C and Δ 114 C are common proxies used to reconstruct past circulation flow rate and ventilation. To overcome the limitations of each proxy taken separately, a better approach is to produce multiproxy measurements on a single sediment core. Yet, different proxies can provide conflicting information about past ocean circulation. Thus, modelling them in a consistent physical framework has become necessary to assess the geographical pattern and the timing and sequence of the multiproxy response to abrupt circulation changes. We have implemented a representation of the 231 Pa and 230 Th tracers into the model of intermediate complexity iLOVECLIM, which already included δ 13 C and Δ 114 C. We have further evaluated the response of these three ocean circulation proxies to a classical abrupt circulation reduction obtained by freshwater addition in the Nordic Seas under preindustrial boundary conditions. The proxy response is shown to cluster in modes that resemble the modern Atlantic water masses. The clearest and most coherent response is obtained in the deep (> 2000 m) northwest Atlantic, where δ 13 C and Δ 114 C significantly decrease, while Pa=Th increases. This is consistent with observational data across millennial-scale events of the last glacial. Interestingly, while in marine records, except in rare instances, the phase relationship between these proxies remains unclear due to large dating uncertainties, in the model the bottom water carbon isotope (δ 13 C and Δ 114 C) response lags behind the sedimentary Pa=Th response by a few hundred years. Article in Journal/Newspaper Nordic Seas Northwest Atlantic Vrije Universiteit Amsterdam (VU): Research Portal Climate of the Past 16 3 867 883 |
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Vrije Universiteit Amsterdam (VU): Research Portal |
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language |
English |
topic |
/dk/atira/pure/sustainabledevelopmentgoals/life_below_water name=SDG 14 - Life Below Water |
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/dk/atira/pure/sustainabledevelopmentgoals/life_below_water name=SDG 14 - Life Below Water Missiaen, Lise Bouttes, Nathaelle Roche, Didier M. Dutay, Jean Claude Quiquet, Aurélien Waelbroeck, Claire Pichat, Sylvain Peterschmitt, Jean Yves Carbon isotopes and PaĝTh response to forced circulation changes:a model perspective |
topic_facet |
/dk/atira/pure/sustainabledevelopmentgoals/life_below_water name=SDG 14 - Life Below Water |
description |
Understanding the ocean circulation changes associated with abrupt climate events is key to better assessing climate variability and understanding its different natural modes. Sedimentary Pa=Th, benthic δ 13 C and Δ 114 C are common proxies used to reconstruct past circulation flow rate and ventilation. To overcome the limitations of each proxy taken separately, a better approach is to produce multiproxy measurements on a single sediment core. Yet, different proxies can provide conflicting information about past ocean circulation. Thus, modelling them in a consistent physical framework has become necessary to assess the geographical pattern and the timing and sequence of the multiproxy response to abrupt circulation changes. We have implemented a representation of the 231 Pa and 230 Th tracers into the model of intermediate complexity iLOVECLIM, which already included δ 13 C and Δ 114 C. We have further evaluated the response of these three ocean circulation proxies to a classical abrupt circulation reduction obtained by freshwater addition in the Nordic Seas under preindustrial boundary conditions. The proxy response is shown to cluster in modes that resemble the modern Atlantic water masses. The clearest and most coherent response is obtained in the deep (> 2000 m) northwest Atlantic, where δ 13 C and Δ 114 C significantly decrease, while Pa=Th increases. This is consistent with observational data across millennial-scale events of the last glacial. Interestingly, while in marine records, except in rare instances, the phase relationship between these proxies remains unclear due to large dating uncertainties, in the model the bottom water carbon isotope (δ 13 C and Δ 114 C) response lags behind the sedimentary Pa=Th response by a few hundred years. |
format |
Article in Journal/Newspaper |
author |
Missiaen, Lise Bouttes, Nathaelle Roche, Didier M. Dutay, Jean Claude Quiquet, Aurélien Waelbroeck, Claire Pichat, Sylvain Peterschmitt, Jean Yves |
author_facet |
Missiaen, Lise Bouttes, Nathaelle Roche, Didier M. Dutay, Jean Claude Quiquet, Aurélien Waelbroeck, Claire Pichat, Sylvain Peterschmitt, Jean Yves |
author_sort |
Missiaen, Lise |
title |
Carbon isotopes and PaĝTh response to forced circulation changes:a model perspective |
title_short |
Carbon isotopes and PaĝTh response to forced circulation changes:a model perspective |
title_full |
Carbon isotopes and PaĝTh response to forced circulation changes:a model perspective |
title_fullStr |
Carbon isotopes and PaĝTh response to forced circulation changes:a model perspective |
title_full_unstemmed |
Carbon isotopes and PaĝTh response to forced circulation changes:a model perspective |
title_sort |
carbon isotopes and paĝth response to forced circulation changes:a model perspective |
publishDate |
2020 |
url |
https://research.vu.nl/en/publications/f96f0fb8-3da6-4f16-9043-127724aa9e2e https://doi.org/10.5194/cp-16-867-2020 https://hdl.handle.net/1871.1/f96f0fb8-3da6-4f16-9043-127724aa9e2e http://www.scopus.com/inward/record.url?scp=85085376673&partnerID=8YFLogxK http://www.scopus.com/inward/citedby.url?scp=85085376673&partnerID=8YFLogxK |
genre |
Nordic Seas Northwest Atlantic |
genre_facet |
Nordic Seas Northwest Atlantic |
op_source |
Missiaen , L , Bouttes , N , Roche , D M , Dutay , J C , Quiquet , A , Waelbroeck , C , Pichat , S & Peterschmitt , J Y 2020 , ' Carbon isotopes and PaĝTh response to forced circulation changes : a model perspective ' , Climate of the Past , vol. 16 , no. 3 , 867-2020 , pp. 867-883 . https://doi.org/10.5194/cp-16-867-2020 |
op_relation |
https://research.vu.nl/en/publications/f96f0fb8-3da6-4f16-9043-127724aa9e2e |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/cp-16-867-2020 |
container_title |
Climate of the Past |
container_volume |
16 |
container_issue |
3 |
container_start_page |
867 |
op_container_end_page |
883 |
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1802647114150313984 |