Assessment of the sea-ice carbon pump: Insights from a three-dimensional ocean-sea-ice biogeochemical model (NEMO-LIM-PISCES)
peer reviewed The role of sea ice in the carbon cycle is minimally represented in current Earth System Models (ESMs). Among potentially important flaws, mentioned by several authors and generally overlooked during ESM design, is the link between sea-ice growth and melt and oceanic dissolved inorgani...
Published in: | Elementa: Science of the Anthropocene |
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Format: | Article in Journal/Newspaper |
Language: | English |
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2016
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Online Access: | https://orbi.uliege.be/handle/2268/201072 https://orbi.uliege.be/bitstream/2268/201072/1/Moreau%20et%20al%202016.pdf https://doi.org/10.12952/journal.elementa.000122 |
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ftorbi:oai:orbi.ulg.ac.be:2268/201072 2024-04-21T07:54:37+00:00 Assessment of the sea-ice carbon pump: Insights from a three-dimensional ocean-sea-ice biogeochemical model (NEMO-LIM-PISCES) Moreau, Sébastien Vancoppenolle, Martin Bopp, Laurent Aumont, Oliver Madec, Gurvan Delille, Bruno Tison, Jean-Louis Barriat, Pierre-Yves Goosse, Hugues FOCUS - Freshwater and OCeanic science Unit of reSearch - ULiège 2016-08-03 https://orbi.uliege.be/handle/2268/201072 https://orbi.uliege.be/bitstream/2268/201072/1/Moreau%20et%20al%202016.pdf https://doi.org/10.12952/journal.elementa.000122 en eng BioOne https://www.elementascience.org/articles/122?#.V7r0QwuB5QU.mendeley urn:issn:2325-1026 https://orbi.uliege.be/handle/2268/201072 info:hdl:2268/201072 https://orbi.uliege.be/bitstream/2268/201072/1/Moreau%20et%20al%202016.pdf doi:10.12952/journal.elementa.000122 scopus-id:2-s2.0-84986275072 open access http://purl.org/coar/access_right/c_abf2 info:eu-repo/semantics/openAccess Elementa: Science of the Anthropocene, 4 (1), 000122 (2016-08-03) Physical chemical mathematical & earth Sciences Earth sciences & physical geography Physique chimie mathématiques & sciences de la terre Sciences de la terre & géographie physique journal article http://purl.org/coar/resource_type/c_6501 info:eu-repo/semantics/article peer reviewed 2016 ftorbi https://doi.org/10.12952/journal.elementa.000122 2024-03-27T14:59:50Z peer reviewed The role of sea ice in the carbon cycle is minimally represented in current Earth System Models (ESMs). Among potentially important flaws, mentioned by several authors and generally overlooked during ESM design, is the link between sea-ice growth and melt and oceanic dissolved inorganic carbon (DIC) and total alkalinity (TA). Here we investigate whether this link is indeed an important feature of the marine carbon cycle misrepresented in ESMs. We use an ocean general circulation model (NEMO-LIM-PISCES) with sea-ice and marine carbon cycle components, forced by atmospheric reanalyses, adding a first-order representation of DIC and TA storage and release in/from sea ice. Our results suggest that DIC rejection during sea-ice growth releases several hundred Tg C yr−1 to the surface ocean, of which < 2% is exported to depth, leading to a notable but weak redistribution of DIC towards deep polar basins. Active carbon processes (mainly CaCO3 precipitation but also ice-atmosphere CO2 fluxes and net community production) increasing the TA/DIC ratio in sea-ice modified ocean-atmosphere CO2 fluxes by a few Tg C yr−1 in the sea-ice zone, with specific hemispheric effects: DIC content of the Arctic basin decreased but DIC content of the Southern Ocean increased. For the global ocean, DIC content increased by 4 Tg C yr−1 or 2 Pg C after 500 years of model run. The simulated numbers are generally small compared to the present-day global ocean annual CO2 sink (2.6 ± 0.5 Pg C yr−1 ). However, sea-ice carbon processes seem important at regional scales as they act significantly on DIC redistribution within and outside polar basins. The efficiency of carbon export to depth depends on the representation of surface-subsurface exchanges and their relationship with sea ice, and could differ substantially if a higher resolution or different ocean model were used. Article in Journal/Newspaper Arctic Basin Sea ice Southern Ocean University of Liège: ORBi (Open Repository and Bibliography) Elementa: Science of the Anthropocene 4 |
institution |
Open Polar |
collection |
University of Liège: ORBi (Open Repository and Bibliography) |
op_collection_id |
ftorbi |
language |
English |
topic |
Physical chemical mathematical & earth Sciences Earth sciences & physical geography Physique chimie mathématiques & sciences de la terre Sciences de la terre & géographie physique |
spellingShingle |
Physical chemical mathematical & earth Sciences Earth sciences & physical geography Physique chimie mathématiques & sciences de la terre Sciences de la terre & géographie physique Moreau, Sébastien Vancoppenolle, Martin Bopp, Laurent Aumont, Oliver Madec, Gurvan Delille, Bruno Tison, Jean-Louis Barriat, Pierre-Yves Goosse, Hugues Assessment of the sea-ice carbon pump: Insights from a three-dimensional ocean-sea-ice biogeochemical model (NEMO-LIM-PISCES) |
topic_facet |
Physical chemical mathematical & earth Sciences Earth sciences & physical geography Physique chimie mathématiques & sciences de la terre Sciences de la terre & géographie physique |
description |
peer reviewed The role of sea ice in the carbon cycle is minimally represented in current Earth System Models (ESMs). Among potentially important flaws, mentioned by several authors and generally overlooked during ESM design, is the link between sea-ice growth and melt and oceanic dissolved inorganic carbon (DIC) and total alkalinity (TA). Here we investigate whether this link is indeed an important feature of the marine carbon cycle misrepresented in ESMs. We use an ocean general circulation model (NEMO-LIM-PISCES) with sea-ice and marine carbon cycle components, forced by atmospheric reanalyses, adding a first-order representation of DIC and TA storage and release in/from sea ice. Our results suggest that DIC rejection during sea-ice growth releases several hundred Tg C yr−1 to the surface ocean, of which < 2% is exported to depth, leading to a notable but weak redistribution of DIC towards deep polar basins. Active carbon processes (mainly CaCO3 precipitation but also ice-atmosphere CO2 fluxes and net community production) increasing the TA/DIC ratio in sea-ice modified ocean-atmosphere CO2 fluxes by a few Tg C yr−1 in the sea-ice zone, with specific hemispheric effects: DIC content of the Arctic basin decreased but DIC content of the Southern Ocean increased. For the global ocean, DIC content increased by 4 Tg C yr−1 or 2 Pg C after 500 years of model run. The simulated numbers are generally small compared to the present-day global ocean annual CO2 sink (2.6 ± 0.5 Pg C yr−1 ). However, sea-ice carbon processes seem important at regional scales as they act significantly on DIC redistribution within and outside polar basins. The efficiency of carbon export to depth depends on the representation of surface-subsurface exchanges and their relationship with sea ice, and could differ substantially if a higher resolution or different ocean model were used. |
author2 |
FOCUS - Freshwater and OCeanic science Unit of reSearch - ULiège |
format |
Article in Journal/Newspaper |
author |
Moreau, Sébastien Vancoppenolle, Martin Bopp, Laurent Aumont, Oliver Madec, Gurvan Delille, Bruno Tison, Jean-Louis Barriat, Pierre-Yves Goosse, Hugues |
author_facet |
Moreau, Sébastien Vancoppenolle, Martin Bopp, Laurent Aumont, Oliver Madec, Gurvan Delille, Bruno Tison, Jean-Louis Barriat, Pierre-Yves Goosse, Hugues |
author_sort |
Moreau, Sébastien |
title |
Assessment of the sea-ice carbon pump: Insights from a three-dimensional ocean-sea-ice biogeochemical model (NEMO-LIM-PISCES) |
title_short |
Assessment of the sea-ice carbon pump: Insights from a three-dimensional ocean-sea-ice biogeochemical model (NEMO-LIM-PISCES) |
title_full |
Assessment of the sea-ice carbon pump: Insights from a three-dimensional ocean-sea-ice biogeochemical model (NEMO-LIM-PISCES) |
title_fullStr |
Assessment of the sea-ice carbon pump: Insights from a three-dimensional ocean-sea-ice biogeochemical model (NEMO-LIM-PISCES) |
title_full_unstemmed |
Assessment of the sea-ice carbon pump: Insights from a three-dimensional ocean-sea-ice biogeochemical model (NEMO-LIM-PISCES) |
title_sort |
assessment of the sea-ice carbon pump: insights from a three-dimensional ocean-sea-ice biogeochemical model (nemo-lim-pisces) |
publisher |
BioOne |
publishDate |
2016 |
url |
https://orbi.uliege.be/handle/2268/201072 https://orbi.uliege.be/bitstream/2268/201072/1/Moreau%20et%20al%202016.pdf https://doi.org/10.12952/journal.elementa.000122 |
genre |
Arctic Basin Sea ice Southern Ocean |
genre_facet |
Arctic Basin Sea ice Southern Ocean |
op_source |
Elementa: Science of the Anthropocene, 4 (1), 000122 (2016-08-03) |
op_relation |
https://www.elementascience.org/articles/122?#.V7r0QwuB5QU.mendeley urn:issn:2325-1026 https://orbi.uliege.be/handle/2268/201072 info:hdl:2268/201072 https://orbi.uliege.be/bitstream/2268/201072/1/Moreau%20et%20al%202016.pdf doi:10.12952/journal.elementa.000122 scopus-id:2-s2.0-84986275072 |
op_rights |
open access http://purl.org/coar/access_right/c_abf2 info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.12952/journal.elementa.000122 |
container_title |
Elementa: Science of the Anthropocene |
container_volume |
4 |
_version_ |
1796937092897439744 |