Marine productivity response to Heinrich events: a model-data comparison
International audience Marine sediments records suggest large changes in marine productivity during glacial periods, with abrupt variations especially during the Heinrich events. Here, we study the response of marine biogeochemistry to such an event by using a biogeochemical model of the global ocea...
Published in: | Climate of the Past |
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Main Authors: | , , , , |
Other Authors: | , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2012
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Online Access: | https://hal.archives-ouvertes.fr/hal-02931502 https://hal.archives-ouvertes.fr/hal-02931502/document https://hal.archives-ouvertes.fr/hal-02931502/file/cp-8-1581-2012.pdf https://doi.org/10.5194/cp-8-1581-2012 |
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Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
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English |
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[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment |
spellingShingle |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment Mariotti, V. Bopp, L. Tagliabue, A. Kageyama, M. Swingedouw, D. Marine productivity response to Heinrich events: a model-data comparison |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment |
description |
International audience Marine sediments records suggest large changes in marine productivity during glacial periods, with abrupt variations especially during the Heinrich events. Here, we study the response of marine biogeochemistry to such an event by using a biogeochemical model of the global ocean (PISCES) coupled to an ocean-atmosphere general circulation model (IPSL-CM4). We conduct a 400-yr-long transient simulation under glacial climate conditions with a freshwater forcing of 0.1 Sv applied to the North Atlantic to mimic a Hein-rich event, alongside a glacial control simulation. To evaluate our numerical results, we have compiled the available marine productivity records covering Heinrich events. We find that simulated primary productivity and organic carbon export decrease globally (by 16 % for both) during a Hein-rich event, albeit with large regional variations. In our experiments , the North Atlantic displays a significant decrease, whereas the Southern Ocean shows an increase, in agreement with paleo-productivity reconstructions. In the Equatorial Pacific , the model simulates an increase in organic matter export production but decreased biogenic silica export. This antagonistic behaviour results from changes in relative uptake of carbon and silicic acid by diatoms. Reasonable agreement between model and data for the large-scale response to Hein-rich events gives confidence in models used to predict future centennial changes in marine production. In addition, our model allows us to investigate the mechanisms behind the observed changes in the response to Heinrich events. |
author2 |
Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ) University of Cape Town Council for Scientific and Industrial Research Cape Town (CSIR) Ministery of Science and Technology Modélisation du climat (CLIM) Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-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)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ) |
format |
Article in Journal/Newspaper |
author |
Mariotti, V. Bopp, L. Tagliabue, A. Kageyama, M. Swingedouw, D. |
author_facet |
Mariotti, V. Bopp, L. Tagliabue, A. Kageyama, M. Swingedouw, D. |
author_sort |
Mariotti, V. |
title |
Marine productivity response to Heinrich events: a model-data comparison |
title_short |
Marine productivity response to Heinrich events: a model-data comparison |
title_full |
Marine productivity response to Heinrich events: a model-data comparison |
title_fullStr |
Marine productivity response to Heinrich events: a model-data comparison |
title_full_unstemmed |
Marine productivity response to Heinrich events: a model-data comparison |
title_sort |
marine productivity response to heinrich events: a model-data comparison |
publisher |
HAL CCSD |
publishDate |
2012 |
url |
https://hal.archives-ouvertes.fr/hal-02931502 https://hal.archives-ouvertes.fr/hal-02931502/document https://hal.archives-ouvertes.fr/hal-02931502/file/cp-8-1581-2012.pdf https://doi.org/10.5194/cp-8-1581-2012 |
geographic |
Pacific Southern Ocean |
geographic_facet |
Pacific Southern Ocean |
genre |
North Atlantic Southern Ocean |
genre_facet |
North Atlantic Southern Ocean |
op_source |
ISSN: 1814-9324 EISSN: 1814-9332 Climate of the Past https://hal.archives-ouvertes.fr/hal-02931502 Climate of the Past, European Geosciences Union (EGU), 2012, 8 (5), pp.1581-1598. ⟨10.5194/cp-8-1581-2012⟩ |
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http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.5194/cp-8-1581-2012 |
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Climate of the Past |
container_volume |
8 |
container_issue |
5 |
container_start_page |
1581 |
op_container_end_page |
1598 |
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1766128876710264832 |
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ftccsdartic:oai:HAL:hal-02931502v1 2023-05-15T17:31:21+02:00 Marine productivity response to Heinrich events: a model-data comparison Mariotti, V. Bopp, L. Tagliabue, A. Kageyama, M. Swingedouw, D. Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ) University of Cape Town Council for Scientific and Industrial Research Cape Town (CSIR) Ministery of Science and Technology Modélisation du climat (CLIM) Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-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)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ) 2012 https://hal.archives-ouvertes.fr/hal-02931502 https://hal.archives-ouvertes.fr/hal-02931502/document https://hal.archives-ouvertes.fr/hal-02931502/file/cp-8-1581-2012.pdf https://doi.org/10.5194/cp-8-1581-2012 en eng HAL CCSD European Geosciences Union (EGU) info:eu-repo/semantics/altIdentifier/doi/10.5194/cp-8-1581-2012 hal-02931502 https://hal.archives-ouvertes.fr/hal-02931502 https://hal.archives-ouvertes.fr/hal-02931502/document https://hal.archives-ouvertes.fr/hal-02931502/file/cp-8-1581-2012.pdf doi:10.5194/cp-8-1581-2012 http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess ISSN: 1814-9324 EISSN: 1814-9332 Climate of the Past https://hal.archives-ouvertes.fr/hal-02931502 Climate of the Past, European Geosciences Union (EGU), 2012, 8 (5), pp.1581-1598. ⟨10.5194/cp-8-1581-2012⟩ [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment info:eu-repo/semantics/article Journal articles 2012 ftccsdartic https://doi.org/10.5194/cp-8-1581-2012 2021-12-19T00:52:16Z International audience Marine sediments records suggest large changes in marine productivity during glacial periods, with abrupt variations especially during the Heinrich events. Here, we study the response of marine biogeochemistry to such an event by using a biogeochemical model of the global ocean (PISCES) coupled to an ocean-atmosphere general circulation model (IPSL-CM4). We conduct a 400-yr-long transient simulation under glacial climate conditions with a freshwater forcing of 0.1 Sv applied to the North Atlantic to mimic a Hein-rich event, alongside a glacial control simulation. To evaluate our numerical results, we have compiled the available marine productivity records covering Heinrich events. We find that simulated primary productivity and organic carbon export decrease globally (by 16 % for both) during a Hein-rich event, albeit with large regional variations. In our experiments , the North Atlantic displays a significant decrease, whereas the Southern Ocean shows an increase, in agreement with paleo-productivity reconstructions. In the Equatorial Pacific , the model simulates an increase in organic matter export production but decreased biogenic silica export. This antagonistic behaviour results from changes in relative uptake of carbon and silicic acid by diatoms. Reasonable agreement between model and data for the large-scale response to Hein-rich events gives confidence in models used to predict future centennial changes in marine production. In addition, our model allows us to investigate the mechanisms behind the observed changes in the response to Heinrich events. Article in Journal/Newspaper North Atlantic Southern Ocean Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Pacific Southern Ocean Climate of the Past 8 5 1581 1598 |