Marine productivity response to Heinrich events: a model-data comparison
Copyright: 2012 European Geosciences Union. This is an Open Access journal. This journal authorizes the publication of the information herewith contained. Published in Climate of the Past, vol. 8(5), pp 1581-1598 Marine sediments records suggest large changes in marine productivity during glacial pe...
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ftcsir:oai:researchspace.csir.co.za:10204/6720 2023-05-15T17:31:31+02:00 Marine productivity response to Heinrich events: a model-data comparison Mariotti, V Bopp, L Tagliabue, A Kageyama, M Swingedouw, D 2012-10 application/pdf http://hdl.handle.net/10204/6720 http://www.clim-past.net/8/1581/2012/cp-8-1581-2012.pdf en eng European Geosciences Union Workflow;10245 Mariotti, V, Bopp, L, Tagliabue, A, Kageyama, M and Swingedouw, D. 2012. Marine productivity response to Heinrich events: a model-data comparison. Climate of the Past, vol. 8(5), pp 1581-1598 1814-9324 http://www.clim-past.net/8/1581/2012/cp-8-1581-2012.pdf http://hdl.handle.net/10204/6720 Marine sediments Heinrich events Marine productivity Article 2012 ftcsir 2022-05-19T06:14:06Z Copyright: 2012 European Geosciences Union. This is an Open Access journal. This journal authorizes the publication of the information herewith contained. Published in Climate of the Past, vol. 8(5), pp 1581-1598 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 Council for Scientific and Industrial Research (South Africa): CSIR Research Space Pacific Southern Ocean |
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Open Polar |
collection |
Council for Scientific and Industrial Research (South Africa): CSIR Research Space |
op_collection_id |
ftcsir |
language |
English |
topic |
Marine sediments Heinrich events Marine productivity |
spellingShingle |
Marine sediments Heinrich events Marine productivity Mariotti, V Bopp, L Tagliabue, A Kageyama, M Swingedouw, D Marine productivity response to Heinrich events: a model-data comparison |
topic_facet |
Marine sediments Heinrich events Marine productivity |
description |
Copyright: 2012 European Geosciences Union. This is an Open Access journal. This journal authorizes the publication of the information herewith contained. Published in Climate of the Past, vol. 8(5), pp 1581-1598 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 |
European Geosciences Union |
publishDate |
2012 |
url |
http://hdl.handle.net/10204/6720 http://www.clim-past.net/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 |
Workflow;10245 Mariotti, V, Bopp, L, Tagliabue, A, Kageyama, M and Swingedouw, D. 2012. Marine productivity response to Heinrich events: a model-data comparison. Climate of the Past, vol. 8(5), pp 1581-1598 1814-9324 http://www.clim-past.net/8/1581/2012/cp-8-1581-2012.pdf http://hdl.handle.net/10204/6720 |
_version_ |
1766129152151257088 |