Spatial distribution of the iron supply to phytoplankton in the Southern Ocean: a model study
An upgraded version of the biogeochemical modelSWAMCO is coupled to the ocean-sea-ice model NEMOLIMto explore processes governing the spatial distributionof the iron supply to phytoplankton in the Southern Ocean.The 3-D NEMO-LIM-SWAMCO model is implemented inthe ocean domain south of latitude 30 S a...
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ftunivtasecite:oai:ecite.utas.edu.au:62627 2023-05-15T13:59:47+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://doi.org/10.5194/bg-6-2861-2009 http://ecite.utas.edu.au/62627 en eng Copernicus Publications http://ecite.utas.edu.au/62627/1/Lancelot2009.pdf http://dx.doi.org/10.5194/bg-6-2861-2009 Lancelot, C and de Montety, A and Goosse, H and Becquevort, S and Schoemann, V and Pasquer, B and Vancoppenolle, M, Spatial distribution of the iron supply to phytoplankton in the Southern Ocean: a model study, Biogeosciences, 6, (12) pp. 2861-2878. ISSN 1726-4170 (2009) [Refereed Article] http://ecite.utas.edu.au/62627 Environmental Sciences Ecological applications Ecosystem function Refereed Article PeerReviewed 2009 ftunivtasecite https://doi.org/10.5194/bg-6-2861-2009 2022-07-11T22:16:44Z An upgraded version of the biogeochemical modelSWAMCO is coupled to the ocean-sea-ice model NEMOLIMto explore processes governing the spatial distributionof the iron supply to phytoplankton in the Southern Ocean.The 3-D NEMO-LIM-SWAMCO model is implemented inthe ocean domain south of latitude 30 S and runs are performedover September 1989-December 2000. Model scenariosinclude potential iron sources (atmospheric deposition,iceberg calving/melting and continental sediments) aswell as iron storage within sea ice, all formulated based on aliterature review. When all these processes are included, thesimulated iron profiles and phytoplankton bloom distributionsshow satisfactory agreement with observations. Analysesof simulations and sensitivity tests point to the keyrole played by continental sediments as a primary source foriron. Iceberg calving and melting contribute by up to 25% ofChl-a simulated in areas influenced by icebergs while atmosphericdeposition has little effect at high latitudes. Activatingsea ice-ocean iron exchanges redistribute iron geographically.Stored in the ice during winter formation, iron is thentransported due to ice motion and is released and made availableto phytoplankton during summer melt, in the vicinity ofthe marginal ice zones. Transient iron storage and transportassociated with sea ice dynamics stimulate summer phytoplanktonblooming (up to 3 mg Chl-a m-3) in the WeddellSea and off East Antarctica but not in the Ross, Bellingshausenand Amundsen Seas. This contrasted feature resultsfrom the simulated variable content of iron in sea ice and releaseof melting ice showing higher ice-ocean iron fluxes inthe continental shelves of the Weddell and Ross Seas than inthe Eastern Weddell Sea and the Bellingshausen-Amundsen Seas. This study confirms that iron sources and transport inthe Southern Ocean likely provide important mechanisms inthe geographical development of phytoplankton blooms andassociated ecosystems. Article in Journal/Newspaper Antarc* Antarctica East Antarctica Sea ice Southern Ocean Weddell Sea eCite UTAS (University of Tasmania) East Antarctica Southern Ocean Weddell Weddell Sea Biogeosciences 6 12 2861 2878 |
institution |
Open Polar |
collection |
eCite UTAS (University of Tasmania) |
op_collection_id |
ftunivtasecite |
language |
English |
topic |
Environmental Sciences Ecological applications Ecosystem function |
spellingShingle |
Environmental Sciences Ecological applications Ecosystem function 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 |
Environmental Sciences Ecological applications Ecosystem function |
description |
An upgraded version of the biogeochemical modelSWAMCO is coupled to the ocean-sea-ice model NEMOLIMto explore processes governing the spatial distributionof the iron supply to phytoplankton in the Southern Ocean.The 3-D NEMO-LIM-SWAMCO model is implemented inthe ocean domain south of latitude 30 S and runs are performedover September 1989-December 2000. Model scenariosinclude potential iron sources (atmospheric deposition,iceberg calving/melting and continental sediments) aswell as iron storage within sea ice, all formulated based on aliterature review. When all these processes are included, thesimulated iron profiles and phytoplankton bloom distributionsshow satisfactory agreement with observations. Analysesof simulations and sensitivity tests point to the keyrole played by continental sediments as a primary source foriron. Iceberg calving and melting contribute by up to 25% ofChl-a simulated in areas influenced by icebergs while atmosphericdeposition has little effect at high latitudes. Activatingsea ice-ocean iron exchanges redistribute iron geographically.Stored in the ice during winter formation, iron is thentransported due to ice motion and is released and made availableto phytoplankton during summer melt, in the vicinity ofthe marginal ice zones. Transient iron storage and transportassociated with sea ice dynamics stimulate summer phytoplanktonblooming (up to 3 mg Chl-a m-3) in the WeddellSea and off East Antarctica but not in the Ross, Bellingshausenand Amundsen Seas. This contrasted feature resultsfrom the simulated variable content of iron in sea ice and releaseof melting ice showing higher ice-ocean iron fluxes inthe continental shelves of the Weddell and Ross Seas than inthe Eastern Weddell Sea and the Bellingshausen-Amundsen Seas. This study confirms that iron sources and transport inthe Southern Ocean likely provide important mechanisms inthe geographical development of phytoplankton blooms andassociated 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 |
publisher |
Copernicus Publications |
publishDate |
2009 |
url |
https://doi.org/10.5194/bg-6-2861-2009 http://ecite.utas.edu.au/62627 |
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_relation |
http://ecite.utas.edu.au/62627/1/Lancelot2009.pdf http://dx.doi.org/10.5194/bg-6-2861-2009 Lancelot, C and de Montety, A and Goosse, H and Becquevort, S and Schoemann, V and Pasquer, B and Vancoppenolle, M, Spatial distribution of the iron supply to phytoplankton in the Southern Ocean: a model study, Biogeosciences, 6, (12) pp. 2861-2878. ISSN 1726-4170 (2009) [Refereed Article] http://ecite.utas.edu.au/62627 |
op_doi |
https://doi.org/10.5194/bg-6-2861-2009 |
container_title |
Biogeosciences |
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6 |
container_issue |
12 |
container_start_page |
2861 |
op_container_end_page |
2878 |
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1766268590549368832 |