Spatial distribution of the iron supply to phytoplankton in the Southern Ocean: a model study
An upgraded version of the biogeochemical model SWAMCO is coupled to the ocean-sea-ice model NEMO-LIM to explore processes governing the spatial distribution of the iron supply to phytoplankton in the Southern Ocean. The 3-D NEMO-LIM-SWAMCO model is implemented in the ocean domain south of latitude...
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ftvliz:oai:oma.vliz.be:144310 2023-05-15T13:33:15+02:00 Spatial distribution of the iron supply to phytoplankton in the Southern Ocean: a model study Lancelot, C. de Montety, A. Goosse, H. Becquevort, S. Schoemann, V. Pasquer, B. Vancoppenolle, M. 2009 application/pdf https://www.vliz.be/imisdocs/publications/157078.pdf en eng info:eu-repo/semantics/altIdentifier/wos/000273060100009 https://www.vliz.be/imisdocs/publications/157078.pdf info:eu-repo/semantics/openAccess iBiogeosciences+612i+2861-2878 Iron Phytoplankton Spatial distribution Supply PS Southern Ocean info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2009 ftvliz 2022-05-01T09:18:32Z An upgraded version of the biogeochemical model SWAMCO is coupled to the ocean-sea-ice model NEMO-LIM to explore processes governing the spatial distribution of the iron supply to phytoplankton in the Southern Ocean. The 3-D NEMO-LIM-SWAMCO model is implemented in the ocean domain south of latitude 30° S and runs are performed over September 1989–December 2000. Model scenarios include potential iron sources (atmospheric deposition, iceberg calving/melting and continental sediments) as well as iron storage within sea ice, all formulated based on a literature review. When all these processes are included, the simulated iron profiles and phytoplankton bloom distributions show satisfactory agreement with observations. Analyses of simulations and sensitivity tests point to the key role played by continental sediments as a primary source for iron. Iceberg calving and melting contribute by up to 25% of Chl- a simulated in areas influenced by icebergs while atmospheric deposition has little effect at high latitudes. Activating sea ice-ocean iron exchanges redistribute iron geographically. Stored in the ice during winter formation, iron is then transported due to ice motion and is released and made available to phytoplankton during summer melt, in the vicinity of the marginal ice zones. Transient iron storage and transport associated with sea ice dynamics stimulate summer phytoplankton blooming (up to 3 mg Chl- a m -3 in the Weddell Sea and off East Antarctica but not in the Ross, Bellingshausen and Amundsen Seas. This contrasted feature results from the simulated variable content of iron in sea ice and release of melting ice showing higher ice-ocean iron fluxes in the continental shelves of the Weddell and Ross Seas than in the Eastern Weddell Sea and the Bellingshausen-Amundsen Seas. This study confirms that iron sources and transport in the Southern Ocean likely provide important mechanisms in the geographical development of phytoplankton blooms and associated ecosystems Article in Journal/Newspaper Antarc* Antarctica East Antarctica Sea ice Southern Ocean Weddell Sea Flanders Marine Institute (VLIZ): Open Marine Archive (OMA) East Antarctica Southern Ocean Weddell Weddell Sea |
institution |
Open Polar |
collection |
Flanders Marine Institute (VLIZ): Open Marine Archive (OMA) |
op_collection_id |
ftvliz |
language |
English |
topic |
Iron Phytoplankton Spatial distribution Supply PS Southern Ocean |
spellingShingle |
Iron Phytoplankton Spatial distribution Supply PS Southern Ocean Lancelot, C. de Montety, A. Goosse, H. Becquevort, S. Schoemann, V. Pasquer, B. Vancoppenolle, M. Spatial distribution of the iron supply to phytoplankton in the Southern Ocean: a model study |
topic_facet |
Iron Phytoplankton Spatial distribution Supply PS Southern Ocean |
description |
An upgraded version of the biogeochemical model SWAMCO is coupled to the ocean-sea-ice model NEMO-LIM to explore processes governing the spatial distribution of the iron supply to phytoplankton in the Southern Ocean. The 3-D NEMO-LIM-SWAMCO model is implemented in the ocean domain south of latitude 30° S and runs are performed over September 1989–December 2000. Model scenarios include potential iron sources (atmospheric deposition, iceberg calving/melting and continental sediments) as well as iron storage within sea ice, all formulated based on a literature review. When all these processes are included, the simulated iron profiles and phytoplankton bloom distributions show satisfactory agreement with observations. Analyses of simulations and sensitivity tests point to the key role played by continental sediments as a primary source for iron. Iceberg calving and melting contribute by up to 25% of Chl- a simulated in areas influenced by icebergs while atmospheric deposition has little effect at high latitudes. Activating sea ice-ocean iron exchanges redistribute iron geographically. Stored in the ice during winter formation, iron is then transported due to ice motion and is released and made available to phytoplankton during summer melt, in the vicinity of the marginal ice zones. Transient iron storage and transport associated with sea ice dynamics stimulate summer phytoplankton blooming (up to 3 mg Chl- a m -3 in the Weddell Sea and off East Antarctica but not in the Ross, Bellingshausen and Amundsen Seas. This contrasted feature results from the simulated variable content of iron in sea ice and release of melting ice showing higher ice-ocean iron fluxes in the continental shelves of the Weddell and Ross Seas than in the Eastern Weddell Sea and the Bellingshausen-Amundsen Seas. This study confirms that iron sources and transport in the Southern Ocean likely provide important mechanisms in the geographical development of phytoplankton blooms and associated ecosystems |
format |
Article in Journal/Newspaper |
author |
Lancelot, C. de Montety, A. Goosse, H. Becquevort, S. Schoemann, V. Pasquer, B. Vancoppenolle, M. |
author_facet |
Lancelot, C. de Montety, A. Goosse, H. Becquevort, S. Schoemann, V. Pasquer, B. Vancoppenolle, M. |
author_sort |
Lancelot, C. |
title |
Spatial distribution of the iron supply to phytoplankton in the Southern Ocean: a model study |
title_short |
Spatial distribution of the iron supply to phytoplankton in the Southern Ocean: a model study |
title_full |
Spatial distribution of the iron supply to phytoplankton in the Southern Ocean: a model study |
title_fullStr |
Spatial distribution of the iron supply to phytoplankton in the Southern Ocean: a model study |
title_full_unstemmed |
Spatial distribution of the iron supply to phytoplankton in the Southern Ocean: a model study |
title_sort |
spatial distribution of the iron supply to phytoplankton in the southern ocean: a model study |
publishDate |
2009 |
url |
https://www.vliz.be/imisdocs/publications/157078.pdf |
geographic |
East Antarctica Southern Ocean Weddell Weddell Sea |
geographic_facet |
East Antarctica Southern Ocean Weddell Weddell Sea |
genre |
Antarc* Antarctica East Antarctica Sea ice Southern Ocean Weddell Sea |
genre_facet |
Antarc* Antarctica East Antarctica Sea ice Southern Ocean Weddell Sea |
op_source |
iBiogeosciences+612i+2861-2878 |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/000273060100009 https://www.vliz.be/imisdocs/publications/157078.pdf |
op_rights |
info:eu-repo/semantics/openAccess |
_version_ |
1766040304836673536 |