Iron Incorporation From Seawater Into Antarctic Sea Ice: A Model Study
International audience Sea ice acts as an iron (Fe) reservoir in the Southern Ocean (SO) where primary productivity is largely Felimited. The mechanisms leading to Fe enrichment in sea ice result from the combination of poorlyunderstood and largely unexplored physical and biological processes. We an...
Published in: | Global Biogeochemical Cycles |
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Main Authors: | , , |
Other Authors: | , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2020
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Online Access: | https://hal.science/hal-03015242 https://hal.science/hal-03015242/document https://hal.science/hal-03015242/file/Person_et_al_GBC2020.pdf https://doi.org/10.1029/2020GB006665 |
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ftunivnantes:oai:HAL:hal-03015242v1 |
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record_format |
openpolar |
institution |
Open Polar |
collection |
Université de Nantes: HAL-UNIV-NANTES |
op_collection_id |
ftunivnantes |
language |
English |
topic |
sea ice iron Southern Ocean biogeochemistry fertilization modeling [SDE.MCG]Environmental Sciences/Global Changes [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
spellingShingle |
sea ice iron Southern Ocean biogeochemistry fertilization modeling [SDE.MCG]Environmental Sciences/Global Changes [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere Person, Renaud Vancoppenolle, M. Aumont, O. Iron Incorporation From Seawater Into Antarctic Sea Ice: A Model Study |
topic_facet |
sea ice iron Southern Ocean biogeochemistry fertilization modeling [SDE.MCG]Environmental Sciences/Global Changes [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
description |
International audience Sea ice acts as an iron (Fe) reservoir in the Southern Ocean (SO) where primary productivity is largely Felimited. The mechanisms leading to Fe enrichment in sea ice result from the combination of poorlyunderstood and largely unexplored physical and biological processes. We analyze the biogeochemicalimpacts of three plausible idealized formulations of dissolved Fe (DFe) incorporation into sea icecorresponding to (i) constant Fe concentration in sea ice, (ii) constant ocean‐ice Feflux, and (iii) ocean‐iceFeflux linearly varying with seawater Fe concentration in a global ocean‐sea‐ice‐biogeochemical model,focusing on the SO. The three formulations simulate different geographical distributions of DFeconcentrations in sea ice. Iron in sea ice remains largely uncertain due to the limited number of spatial andseasonal observations, poorly constrained Fe sources and sinks, and significant uncertainties in simulatedsea ice and hydrography. Despite these differences, the fertilization effect by sea ice on phytoplanktonphotosynthesis is qualitatively similar regardless of the formulation considered. Iron incorporation duringsea‐ice formation, transport, and melt release, common to all formulations, dominates over differences insea‐ice Fe concentrations. Formulating the Fe incorporation rate as proportional to seawater Feconcentrations gives the closest agreement tofield observations. With this formulation, sediments work insynergy with Fe transport to fertilize the waters north of the continental shelf. Southern Ocean primaryproduction and export production increase by 5–10% and 9–19%, respectively, when Fe incorporation intosea ice is considered, suggesting a moderate effect of Fe‐bearing sea ice on marine productivit |
author2 |
Nucleus for European Modeling of the Ocean (NEMO R&D ) Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques (LOCEAN) Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)) École normale supérieure - Paris (ENS-PSL) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)-École normale supérieure - Paris (ENS-PSL) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité) ANR-16-CE01-0014,SOBUMS,Comprendre la réponse du cycle du carbone dans l'océan austral au stress climatique(2016) |
format |
Article in Journal/Newspaper |
author |
Person, Renaud Vancoppenolle, M. Aumont, O. |
author_facet |
Person, Renaud Vancoppenolle, M. Aumont, O. |
author_sort |
Person, Renaud |
title |
Iron Incorporation From Seawater Into Antarctic Sea Ice: A Model Study |
title_short |
Iron Incorporation From Seawater Into Antarctic Sea Ice: A Model Study |
title_full |
Iron Incorporation From Seawater Into Antarctic Sea Ice: A Model Study |
title_fullStr |
Iron Incorporation From Seawater Into Antarctic Sea Ice: A Model Study |
title_full_unstemmed |
Iron Incorporation From Seawater Into Antarctic Sea Ice: A Model Study |
title_sort |
iron incorporation from seawater into antarctic sea ice: a model study |
publisher |
HAL CCSD |
publishDate |
2020 |
url |
https://hal.science/hal-03015242 https://hal.science/hal-03015242/document https://hal.science/hal-03015242/file/Person_et_al_GBC2020.pdf https://doi.org/10.1029/2020GB006665 |
geographic |
Antarctic Southern Ocean |
geographic_facet |
Antarctic Southern Ocean |
genre |
Antarc* Antarctic Sea ice Southern Ocean |
genre_facet |
Antarc* Antarctic Sea ice Southern Ocean |
op_source |
ISSN: 0886-6236 EISSN: 1944-8224 Global Biogeochemical Cycles https://hal.science/hal-03015242 Global Biogeochemical Cycles, 2020, 34 (11), pp.e2020GB006665. ⟨10.1029/2020GB006665⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/2020GB006665 hal-03015242 https://hal.science/hal-03015242 https://hal.science/hal-03015242/document https://hal.science/hal-03015242/file/Person_et_al_GBC2020.pdf doi:10.1029/2020GB006665 IRD: fdi:010080435 WOS: 000595748400006 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1029/2020GB006665 |
container_title |
Global Biogeochemical Cycles |
container_volume |
34 |
container_issue |
11 |
_version_ |
1766028434644926464 |
spelling |
ftunivnantes:oai:HAL:hal-03015242v1 2023-05-15T13:32:34+02:00 Iron Incorporation From Seawater Into Antarctic Sea Ice: A Model Study Person, Renaud Vancoppenolle, M. Aumont, O. Nucleus for European Modeling of the Ocean (NEMO R&D ) Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques (LOCEAN) Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)) École normale supérieure - Paris (ENS-PSL) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)-École normale supérieure - Paris (ENS-PSL) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité) ANR-16-CE01-0014,SOBUMS,Comprendre la réponse du cycle du carbone dans l'océan austral au stress climatique(2016) 2020-11 https://hal.science/hal-03015242 https://hal.science/hal-03015242/document https://hal.science/hal-03015242/file/Person_et_al_GBC2020.pdf https://doi.org/10.1029/2020GB006665 en eng HAL CCSD American Geophysical Union info:eu-repo/semantics/altIdentifier/doi/10.1029/2020GB006665 hal-03015242 https://hal.science/hal-03015242 https://hal.science/hal-03015242/document https://hal.science/hal-03015242/file/Person_et_al_GBC2020.pdf doi:10.1029/2020GB006665 IRD: fdi:010080435 WOS: 000595748400006 info:eu-repo/semantics/OpenAccess ISSN: 0886-6236 EISSN: 1944-8224 Global Biogeochemical Cycles https://hal.science/hal-03015242 Global Biogeochemical Cycles, 2020, 34 (11), pp.e2020GB006665. ⟨10.1029/2020GB006665⟩ sea ice iron Southern Ocean biogeochemistry fertilization modeling [SDE.MCG]Environmental Sciences/Global Changes [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere info:eu-repo/semantics/article Journal articles 2020 ftunivnantes https://doi.org/10.1029/2020GB006665 2023-01-18T00:33:23Z International audience Sea ice acts as an iron (Fe) reservoir in the Southern Ocean (SO) where primary productivity is largely Felimited. The mechanisms leading to Fe enrichment in sea ice result from the combination of poorlyunderstood and largely unexplored physical and biological processes. We analyze the biogeochemicalimpacts of three plausible idealized formulations of dissolved Fe (DFe) incorporation into sea icecorresponding to (i) constant Fe concentration in sea ice, (ii) constant ocean‐ice Feflux, and (iii) ocean‐iceFeflux linearly varying with seawater Fe concentration in a global ocean‐sea‐ice‐biogeochemical model,focusing on the SO. The three formulations simulate different geographical distributions of DFeconcentrations in sea ice. Iron in sea ice remains largely uncertain due to the limited number of spatial andseasonal observations, poorly constrained Fe sources and sinks, and significant uncertainties in simulatedsea ice and hydrography. Despite these differences, the fertilization effect by sea ice on phytoplanktonphotosynthesis is qualitatively similar regardless of the formulation considered. Iron incorporation duringsea‐ice formation, transport, and melt release, common to all formulations, dominates over differences insea‐ice Fe concentrations. Formulating the Fe incorporation rate as proportional to seawater Feconcentrations gives the closest agreement tofield observations. With this formulation, sediments work insynergy with Fe transport to fertilize the waters north of the continental shelf. Southern Ocean primaryproduction and export production increase by 5–10% and 9–19%, respectively, when Fe incorporation intosea ice is considered, suggesting a moderate effect of Fe‐bearing sea ice on marine productivit Article in Journal/Newspaper Antarc* Antarctic Sea ice Southern Ocean Université de Nantes: HAL-UNIV-NANTES Antarctic Southern Ocean Global Biogeochemical Cycles 34 11 |