Carbon isotopes and Pa/Th response to forced circulation changes: a model perspective
International audience 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 14 C are common proxies used to reconstruct past circulation...
Published in: | Climate of the Past |
---|---|
Main Authors: | , , , , , , , |
Other Authors: | , , , , , , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2020
|
Subjects: | |
Online Access: | https://hal.science/hal-02407200 https://hal.science/hal-02407200/document https://hal.science/hal-02407200/file/cp-16-867-2020.pdf https://doi.org/10.5194/cp-16-867-2020 |
id |
ftunivlyon:oai:HAL:hal-02407200v1 |
---|---|
record_format |
openpolar |
institution |
Open Polar |
collection |
Université de Lyon: HAL |
op_collection_id |
ftunivlyon |
language |
English |
topic |
iLOVECLIM [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology |
spellingShingle |
iLOVECLIM [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology Missiaen, Lise Bouttes, Nathaëlle Roche, Didier M. Dutay, Jean-Claude Quiquet, Aurélien Waelbroeck, Claire Pichat, Sylvain Peterschmitt, Jean-Yves Carbon isotopes and Pa/Th response to forced circulation changes: a model perspective |
topic_facet |
iLOVECLIM [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology |
description |
International audience 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 14 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 14 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 14 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 14 C) response lags behind the sedimentary Pa=Th response by a few hundred years. |
author2 |
Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA) University of New South Wales Sydney (UNSW) Modélisation du climat (CLIM) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Vrije Universiteit Amsterdam Amsterdam (VU) Institut Louis Bachelier Paléocéanographie (PALEOCEAN) Laboratoire de Géologie de Lyon - Terre, Planètes, Environnement (LGL-TPE) École normale supérieure de Lyon (ENS de Lyon)-Université Claude Bernard Lyon 1 (UCBL) Université de Lyon-Université de Lyon-Institut national des sciences de l'Univers (INSU - CNRS)-Université Jean Monnet - Saint-Étienne (UJM)-Centre National de la Recherche Scientifique (CNRS) Max Planck Institute for Chemistry (MPIC) Max-Planck-Gesellschaft Australian Research Council, ARC: DP180100048 the Australian Research Council (grant no. DP180100048). European Project: 339108,EC:FP7:ERC,ERC-2013-ADG,ACCLIMATE(2014) |
format |
Article in Journal/Newspaper |
author |
Missiaen, Lise Bouttes, Nathaëlle Roche, Didier M. Dutay, Jean-Claude Quiquet, Aurélien Waelbroeck, Claire Pichat, Sylvain Peterschmitt, Jean-Yves |
author_facet |
Missiaen, Lise Bouttes, Nathaëlle Roche, Didier M. Dutay, Jean-Claude Quiquet, Aurélien Waelbroeck, Claire Pichat, Sylvain Peterschmitt, Jean-Yves |
author_sort |
Missiaen, Lise |
title |
Carbon isotopes and Pa/Th response to forced circulation changes: a model perspective |
title_short |
Carbon isotopes and Pa/Th response to forced circulation changes: a model perspective |
title_full |
Carbon isotopes and Pa/Th response to forced circulation changes: a model perspective |
title_fullStr |
Carbon isotopes and Pa/Th response to forced circulation changes: a model perspective |
title_full_unstemmed |
Carbon isotopes and Pa/Th response to forced circulation changes: a model perspective |
title_sort |
carbon isotopes and pa/th response to forced circulation changes: a model perspective |
publisher |
HAL CCSD |
publishDate |
2020 |
url |
https://hal.science/hal-02407200 https://hal.science/hal-02407200/document https://hal.science/hal-02407200/file/cp-16-867-2020.pdf https://doi.org/10.5194/cp-16-867-2020 |
genre |
Nordic Seas Northwest Atlantic |
genre_facet |
Nordic Seas Northwest Atlantic |
op_source |
ISSN: 1814-9324 EISSN: 1814-9332 Climate of the Past https://hal.science/hal-02407200 Climate of the Past, 2020, 16 (3), pp.867-883. ⟨10.5194/cp-16-867-2020⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.5194/cp-16-867-2020 info:eu-repo/grantAgreement/EC/FP7/339108/EU/Elucidating the Causes and Effects of Atlantic Circulation Changes through Model-Data Integration/ACCLIMATE hal-02407200 https://hal.science/hal-02407200 https://hal.science/hal-02407200/document https://hal.science/hal-02407200/file/cp-16-867-2020.pdf doi:10.5194/cp-16-867-2020 WOS: 000537113300001 |
op_rights |
http://creativecommons.org/licenses/by/ 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 |
_version_ |
1802647111556136960 |
spelling |
ftunivlyon:oai:HAL:hal-02407200v1 2024-06-23T07:54:50+00:00 Carbon isotopes and Pa/Th response to forced circulation changes: a model perspective Missiaen, Lise Bouttes, Nathaëlle Roche, Didier M. Dutay, Jean-Claude Quiquet, Aurélien Waelbroeck, Claire Pichat, Sylvain Peterschmitt, Jean-Yves Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA) University of New South Wales Sydney (UNSW) Modélisation du climat (CLIM) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Vrije Universiteit Amsterdam Amsterdam (VU) Institut Louis Bachelier Paléocéanographie (PALEOCEAN) Laboratoire de Géologie de Lyon - Terre, Planètes, Environnement (LGL-TPE) École normale supérieure de Lyon (ENS de Lyon)-Université Claude Bernard Lyon 1 (UCBL) Université de Lyon-Université de Lyon-Institut national des sciences de l'Univers (INSU - CNRS)-Université Jean Monnet - Saint-Étienne (UJM)-Centre National de la Recherche Scientifique (CNRS) Max Planck Institute for Chemistry (MPIC) Max-Planck-Gesellschaft Australian Research Council, ARC: DP180100048 the Australian Research Council (grant no. DP180100048). European Project: 339108,EC:FP7:ERC,ERC-2013-ADG,ACCLIMATE(2014) 2020 https://hal.science/hal-02407200 https://hal.science/hal-02407200/document https://hal.science/hal-02407200/file/cp-16-867-2020.pdf https://doi.org/10.5194/cp-16-867-2020 en eng HAL CCSD European Geosciences Union (EGU) info:eu-repo/semantics/altIdentifier/doi/10.5194/cp-16-867-2020 info:eu-repo/grantAgreement/EC/FP7/339108/EU/Elucidating the Causes and Effects of Atlantic Circulation Changes through Model-Data Integration/ACCLIMATE hal-02407200 https://hal.science/hal-02407200 https://hal.science/hal-02407200/document https://hal.science/hal-02407200/file/cp-16-867-2020.pdf doi:10.5194/cp-16-867-2020 WOS: 000537113300001 http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess ISSN: 1814-9324 EISSN: 1814-9332 Climate of the Past https://hal.science/hal-02407200 Climate of the Past, 2020, 16 (3), pp.867-883. ⟨10.5194/cp-16-867-2020⟩ iLOVECLIM [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology info:eu-repo/semantics/article Journal articles 2020 ftunivlyon https://doi.org/10.5194/cp-16-867-2020 2024-05-27T14:45:40Z International audience 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 14 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 14 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 14 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 14 C) response lags behind the sedimentary Pa=Th response by a few hundred years. Article in Journal/Newspaper Nordic Seas Northwest Atlantic Université de Lyon: HAL Climate of the Past 16 3 867 883 |