Assessment of the sea-ice carbon pump: Insights from a three-dimensional ocean-sea-ice biogeochemical model (NEMO-LIM-PISCES)
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)...
Published in: | Elementa: Science of the Anthropocene |
---|---|
Main Authors: | , , , , , , , , |
Other Authors: | |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
BioOne
2016
|
Subjects: | |
Online Access: | http://hdl.handle.net/2078.1/177641 https://doi.org/10.12952/journal.elementa.000122 |
id |
ftunistlouisbrus:oai:dial.uclouvain.be:boreal:177641 |
---|---|
record_format |
openpolar |
spelling |
ftunistlouisbrus:oai:dial.uclouvain.be:boreal:177641 2024-05-12T07:57:50+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 UCL - SST/ELI/ELIC - Earth & Climate 2016 http://hdl.handle.net/2078.1/177641 https://doi.org/10.12952/journal.elementa.000122 eng eng BioOne boreal:177641 http://hdl.handle.net/2078.1/177641 doi:10.12952/journal.elementa.000122 urn:ISSN:2325-1026 urn:EISSN:2325-1026 info:eu-repo/semantics/restrictedAccess Elementa : science of the anthropocene, Vol. 4, no.4, p. 000122 (2016) CISM:CECI 1443 info:eu-repo/semantics/article 2016 ftunistlouisbrus https://doi.org/10.12952/journal.elementa.000122 2024-04-18T17:40:16Z 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 DIAL@USL-B (Université Saint-Louis, Bruxelles) Arctic Southern Ocean Elementa: Science of the Anthropocene 4 |
institution |
Open Polar |
collection |
DIAL@USL-B (Université Saint-Louis, Bruxelles) |
op_collection_id |
ftunistlouisbrus |
language |
English |
topic |
CISM:CECI 1443 |
spellingShingle |
CISM:CECI 1443 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 |
CISM:CECI 1443 |
description |
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 |
UCL - SST/ELI/ELIC - Earth & Climate |
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 |
http://hdl.handle.net/2078.1/177641 https://doi.org/10.12952/journal.elementa.000122 |
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, Vol. 4, no.4, p. 000122 (2016) |
op_relation |
boreal:177641 http://hdl.handle.net/2078.1/177641 doi:10.12952/journal.elementa.000122 urn:ISSN:2325-1026 urn:EISSN:2325-1026 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.12952/journal.elementa.000122 |
container_title |
Elementa: Science of the Anthropocene |
container_volume |
4 |
_version_ |
1798838221200687104 |