Southern Ocean CO2 sink: the contribution of the sea ice
We report first direct measurements of the partial pressure of CO2 (pCO2) within Antarctic pack sea ice brines and related CO2 fluxes across the air-ice interface. From late winter to summer, brines encased in the ice change from a CO2 large oversaturation, relative to the atmosphere, to a marked un...
Published in: | Journal of Geophysical Research: Oceans |
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2014
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ftuniaarhuspubl:oai:pure.atira.dk:publications/7eb5dc0a-b31a-4df8-8eac-9d45926fbc09 2024-04-28T07:56:30+00:00 Southern Ocean CO2 sink: the contribution of the sea ice Delille, B. Vancoppenolle, Martin Geilfus, Nicolas-Xavier Tilbrook, T. Lannuzel, Delphine Schoemann, V. Becquevort, S Carnat, Gauthier Delille, D. Lancelot, C. Chou, C. Dieckmann, Gerhard S. Tison, J.-L. 2014 application/pdf https://pure.au.dk/portal/en/publications/7eb5dc0a-b31a-4df8-8eac-9d45926fbc09 https://doi.org/10.1002/2014JC009941 https://pure.au.dk/ws/files/82099656/Delille_et_al_2014_.pdf eng eng https://pure.au.dk/portal/en/publications/7eb5dc0a-b31a-4df8-8eac-9d45926fbc09 info:eu-repo/semantics/restrictedAccess Delille , B , Vancoppenolle , M , Geilfus , N-X , Tilbrook , T , Lannuzel , D , Schoemann , V , Becquevort , S , Carnat , G , Delille , D , Lancelot , C , Chou , C , Dieckmann , G S & Tison , J-L 2014 , ' Southern Ocean CO2 sink: the contribution of the sea ice ' , Journal of Geophysical Research: Oceans , vol. 119 , no. 9 , pp. 6340-6355 . https://doi.org/10.1002/2014JC009941 article 2014 ftuniaarhuspubl https://doi.org/10.1002/2014JC009941 2024-04-10T23:41:05Z We report first direct measurements of the partial pressure of CO2 (pCO2) within Antarctic pack sea ice brines and related CO2 fluxes across the air-ice interface. From late winter to summer, brines encased in the ice change from a CO2 large oversaturation, relative to the atmosphere, to a marked undersaturation while the underlying oceanic waters remains slightly oversaturated. The decrease from winter to summer of pCO2 in the brines is driven by dilution with melting ice, dissolution of carbonate crystals, and net primary production. As the ice warms, its permeability increases, allowing CO2 transfer at the air-sea ice interface. The sea ice changes from a transient source to a sink for atmospheric CO2. We upscale these observations to the whole Antarctic sea ice cover using the NEMO-LIM3 large-scale sea ice-ocean and provide first esti- mates of spring and summer CO2 uptake from the atmosphere by Antarctic sea ice. Over the spring- summer period, the Antarctic sea ice cover is a net sink of atmospheric CO2 of 0.029 Pg C, about 58% of the estimated annual uptake from the Southern Ocean. Sea ice then contributes significantly to the sink of CO2 of the Southern Ocean. Article in Journal/Newspaper Antarc* Antarctic Sea ice Southern Ocean Aarhus University: Research Journal of Geophysical Research: Oceans 119 9 6340 6355 |
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Open Polar |
collection |
Aarhus University: Research |
op_collection_id |
ftuniaarhuspubl |
language |
English |
description |
We report first direct measurements of the partial pressure of CO2 (pCO2) within Antarctic pack sea ice brines and related CO2 fluxes across the air-ice interface. From late winter to summer, brines encased in the ice change from a CO2 large oversaturation, relative to the atmosphere, to a marked undersaturation while the underlying oceanic waters remains slightly oversaturated. The decrease from winter to summer of pCO2 in the brines is driven by dilution with melting ice, dissolution of carbonate crystals, and net primary production. As the ice warms, its permeability increases, allowing CO2 transfer at the air-sea ice interface. The sea ice changes from a transient source to a sink for atmospheric CO2. We upscale these observations to the whole Antarctic sea ice cover using the NEMO-LIM3 large-scale sea ice-ocean and provide first esti- mates of spring and summer CO2 uptake from the atmosphere by Antarctic sea ice. Over the spring- summer period, the Antarctic sea ice cover is a net sink of atmospheric CO2 of 0.029 Pg C, about 58% of the estimated annual uptake from the Southern Ocean. Sea ice then contributes significantly to the sink of CO2 of the Southern Ocean. |
format |
Article in Journal/Newspaper |
author |
Delille, B. Vancoppenolle, Martin Geilfus, Nicolas-Xavier Tilbrook, T. Lannuzel, Delphine Schoemann, V. Becquevort, S Carnat, Gauthier Delille, D. Lancelot, C. Chou, C. Dieckmann, Gerhard S. Tison, J.-L. |
spellingShingle |
Delille, B. Vancoppenolle, Martin Geilfus, Nicolas-Xavier Tilbrook, T. Lannuzel, Delphine Schoemann, V. Becquevort, S Carnat, Gauthier Delille, D. Lancelot, C. Chou, C. Dieckmann, Gerhard S. Tison, J.-L. Southern Ocean CO2 sink: the contribution of the sea ice |
author_facet |
Delille, B. Vancoppenolle, Martin Geilfus, Nicolas-Xavier Tilbrook, T. Lannuzel, Delphine Schoemann, V. Becquevort, S Carnat, Gauthier Delille, D. Lancelot, C. Chou, C. Dieckmann, Gerhard S. Tison, J.-L. |
author_sort |
Delille, B. |
title |
Southern Ocean CO2 sink: the contribution of the sea ice |
title_short |
Southern Ocean CO2 sink: the contribution of the sea ice |
title_full |
Southern Ocean CO2 sink: the contribution of the sea ice |
title_fullStr |
Southern Ocean CO2 sink: the contribution of the sea ice |
title_full_unstemmed |
Southern Ocean CO2 sink: the contribution of the sea ice |
title_sort |
southern ocean co2 sink: the contribution of the sea ice |
publishDate |
2014 |
url |
https://pure.au.dk/portal/en/publications/7eb5dc0a-b31a-4df8-8eac-9d45926fbc09 https://doi.org/10.1002/2014JC009941 https://pure.au.dk/ws/files/82099656/Delille_et_al_2014_.pdf |
genre |
Antarc* Antarctic Sea ice Southern Ocean |
genre_facet |
Antarc* Antarctic Sea ice Southern Ocean |
op_source |
Delille , B , Vancoppenolle , M , Geilfus , N-X , Tilbrook , T , Lannuzel , D , Schoemann , V , Becquevort , S , Carnat , G , Delille , D , Lancelot , C , Chou , C , Dieckmann , G S & Tison , J-L 2014 , ' Southern Ocean CO2 sink: the contribution of the sea ice ' , Journal of Geophysical Research: Oceans , vol. 119 , no. 9 , pp. 6340-6355 . https://doi.org/10.1002/2014JC009941 |
op_relation |
https://pure.au.dk/portal/en/publications/7eb5dc0a-b31a-4df8-8eac-9d45926fbc09 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1002/2014JC009941 |
container_title |
Journal of Geophysical Research: Oceans |
container_volume |
119 |
container_issue |
9 |
container_start_page |
6340 |
op_container_end_page |
6355 |
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1797583504246046720 |