Assessment of the sea-ice carbon pump: Insights from a three-dimensional ocean-sea-ice biogeochemical model (NEMO-LIM-PISCES)
Abstract 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 car...
Published in: | Elementa: Science of the Anthropocene |
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2016
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Online Access: | https://doi.org/10.12952/journal.elementa.000122 https://doaj.org/article/3461cfe788e9487fa8c0c4f12d978343 |
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fttriple:oai:gotriple.eu:oai:doaj.org/article:3461cfe788e9487fa8c0c4f12d978343 2023-05-15T14:29:20+02:00 Assessment of the sea-ice carbon pump: Insights from a three-dimensional ocean-sea-ice biogeochemical model (NEMO-LIM-PISCES) Sébastien Moreau Martin Vancoppenolle Laurent Bopp Oliver Aumont Gurvan Madec Bruno Delille Jean-Louis Tison Pierre-Yves Barriat Hugues Goosse 2016-08-01 https://doi.org/10.12952/journal.elementa.000122 https://doaj.org/article/3461cfe788e9487fa8c0c4f12d978343 en eng BioOne 2325-1026 doi:10.12952/journal.elementa.000122 https://doaj.org/article/3461cfe788e9487fa8c0c4f12d978343 undefined Elementa: Science of the Anthropocene (2016) carbon sea-ice Earth System Model envir geo Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2016 fttriple https://doi.org/10.12952/journal.elementa.000122 2023-01-22T18:59:58Z Abstract 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 Arctic Sea ice Southern Ocean Unknown Arctic Southern Ocean Elementa: Science of the Anthropocene 4 |
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Open Polar |
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Unknown |
op_collection_id |
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language |
English |
topic |
carbon sea-ice Earth System Model envir geo |
spellingShingle |
carbon sea-ice Earth System Model envir geo Sébastien Moreau Martin Vancoppenolle Laurent Bopp Oliver Aumont Gurvan Madec Bruno Delille Jean-Louis Tison Pierre-Yves Barriat Hugues Goosse Assessment of the sea-ice carbon pump: Insights from a three-dimensional ocean-sea-ice biogeochemical model (NEMO-LIM-PISCES) |
topic_facet |
carbon sea-ice Earth System Model envir geo |
description |
Abstract 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. |
format |
Article in Journal/Newspaper |
author |
Sébastien Moreau Martin Vancoppenolle Laurent Bopp Oliver Aumont Gurvan Madec Bruno Delille Jean-Louis Tison Pierre-Yves Barriat Hugues Goosse |
author_facet |
Sébastien Moreau Martin Vancoppenolle Laurent Bopp Oliver Aumont Gurvan Madec Bruno Delille Jean-Louis Tison Pierre-Yves Barriat Hugues Goosse |
author_sort |
Sébastien Moreau |
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://doi.org/10.12952/journal.elementa.000122 https://doaj.org/article/3461cfe788e9487fa8c0c4f12d978343 |
geographic |
Arctic Southern Ocean |
geographic_facet |
Arctic Southern Ocean |
genre |
Arctic Basin Arctic Sea ice Southern Ocean |
genre_facet |
Arctic Basin Arctic Sea ice Southern Ocean |
op_source |
Elementa: Science of the Anthropocene (2016) |
op_relation |
2325-1026 doi:10.12952/journal.elementa.000122 https://doaj.org/article/3461cfe788e9487fa8c0c4f12d978343 |
op_rights |
undefined |
op_doi |
https://doi.org/10.12952/journal.elementa.000122 |
container_title |
Elementa: Science of the Anthropocene |
container_volume |
4 |
_version_ |
1766303377644322816 |