Marine productivity response to Heinrich events: a model-data comparison
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 a...
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2012
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00024022 2023-05-15T17:30:51+02:00 Marine productivity response to Heinrich events: a model-data comparison Mariotti, V. Bopp, L. Tagliabue, A. Kageyama, M. Swingedouw, D. 2012-10 electronic https://doi.org/10.5194/cp-8-1581-2012 https://noa.gwlb.de/receive/cop_mods_00024022 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00023977/cp-8-1581-2012.pdf https://cp.copernicus.org/articles/8/1581/2012/cp-8-1581-2012.pdf eng eng Copernicus Publications Climate of the Past -- http://www.copernicus.org/EGU/cp/cp/published_papers.html -- http://www.bibliothek.uni-regensburg.de/ezeit/?2217985 -- 1814-9332 https://doi.org/10.5194/cp-8-1581-2012 https://noa.gwlb.de/receive/cop_mods_00024022 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00023977/cp-8-1581-2012.pdf https://cp.copernicus.org/articles/8/1581/2012/cp-8-1581-2012.pdf uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2012 ftnonlinearchiv https://doi.org/10.5194/cp-8-1581-2012 2022-02-08T22:50:21Z 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 Heinrich 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 Heinrich 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 Heinrich 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 Niedersächsisches Online-Archiv NOA Pacific Southern Ocean Climate of the Past 8 5 1581 1598 |
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ftnonlinearchiv |
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English |
topic |
article Verlagsveröffentlichung |
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article Verlagsveröffentlichung Mariotti, V. Bopp, L. Tagliabue, A. Kageyama, M. Swingedouw, D. Marine productivity response to Heinrich events: a model-data comparison |
topic_facet |
article Verlagsveröffentlichung |
description |
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 Heinrich 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 Heinrich 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 Heinrich 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. |
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 |
Copernicus Publications |
publishDate |
2012 |
url |
https://doi.org/10.5194/cp-8-1581-2012 https://noa.gwlb.de/receive/cop_mods_00024022 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00023977/cp-8-1581-2012.pdf https://cp.copernicus.org/articles/8/1581/2012/cp-8-1581-2012.pdf |
geographic |
Pacific Southern Ocean |
geographic_facet |
Pacific Southern Ocean |
genre |
North Atlantic Southern Ocean |
genre_facet |
North Atlantic Southern Ocean |
op_relation |
Climate of the Past -- http://www.copernicus.org/EGU/cp/cp/published_papers.html -- http://www.bibliothek.uni-regensburg.de/ezeit/?2217985 -- 1814-9332 https://doi.org/10.5194/cp-8-1581-2012 https://noa.gwlb.de/receive/cop_mods_00024022 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00023977/cp-8-1581-2012.pdf https://cp.copernicus.org/articles/8/1581/2012/cp-8-1581-2012.pdf |
op_rights |
uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/cp-8-1581-2012 |
container_title |
Climate of the Past |
container_volume |
8 |
container_issue |
5 |
container_start_page |
1581 |
op_container_end_page |
1598 |
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1766127954580996096 |