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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ftunivbruxelles:oai:dipot.ulb.ac.be:2013/189092 2023-05-15T13:42:08+02:00 Southern Ocean CO2 sink: The contribution of the sea ice Delille, Bruno Vancoppenolle, Martin Geilfus, Nicolas Xavier Tilbrook, Bronte Lannuzel, Delphine Schoemann, Véronique Becquevort, Sylvie Carnat, Gauthier Delille, D. Lancelot, Christiane Chou, Lei Dieckmann, Gerhard Tison, Jean-Louis 2014 1 full-text file(s): application/pdf http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/189092 https://dipot.ulb.ac.be/dspace/bitstream/2013/189092/3/189092.pdf en eng uri/info:doi/10.1002/2014JC009941 local/http://dx.doi.org/10.1002/2014JC009941 https://dipot.ulb.ac.be/dspace/bitstream/2013/189092/3/189092.pdf http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/189092 1 full-text file(s): info:eu-repo/semantics/restrictedAccess Journal of geophysical research. Oceans, 119 (9 Climatologie Glaciologie Océanographie physique et chimique Sciences exactes et naturelles sea ice Antarctic carbon dioxide CaCO3 precipitation NEMO-LIM3 info:eu-repo/semantics/article info:ulb-repo/semantics/articlePeerReview info:ulb-repo/semantics/openurl/article 2014 ftunivbruxelles https://doi.org/10.1002/2014JC009941 2022-06-12T20:38:10Z 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 estimates 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. FLWIN info:eu-repo/semantics/published Article in Journal/Newspaper Antarc* Antarctic Sea ice Southern Ocean DI-fusion : dépôt institutionnel de l'Université libre de Bruxelles (ULB) Antarctic Southern Ocean The Antarctic Journal of Geophysical Research: Oceans 119 9 6340 6355 |
institution |
Open Polar |
collection |
DI-fusion : dépôt institutionnel de l'Université libre de Bruxelles (ULB) |
op_collection_id |
ftunivbruxelles |
language |
English |
topic |
Climatologie Glaciologie Océanographie physique et chimique Sciences exactes et naturelles sea ice Antarctic carbon dioxide CaCO3 precipitation NEMO-LIM3 |
spellingShingle |
Climatologie Glaciologie Océanographie physique et chimique Sciences exactes et naturelles sea ice Antarctic carbon dioxide CaCO3 precipitation NEMO-LIM3 Delille, Bruno Vancoppenolle, Martin Geilfus, Nicolas Xavier Tilbrook, Bronte Lannuzel, Delphine Schoemann, Véronique Becquevort, Sylvie Carnat, Gauthier Delille, D. Lancelot, Christiane Chou, Lei Dieckmann, Gerhard Tison, Jean-Louis Southern Ocean CO2 sink: The contribution of the sea ice |
topic_facet |
Climatologie Glaciologie Océanographie physique et chimique Sciences exactes et naturelles sea ice Antarctic carbon dioxide CaCO3 precipitation NEMO-LIM3 |
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 estimates 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. FLWIN info:eu-repo/semantics/published |
format |
Article in Journal/Newspaper |
author |
Delille, Bruno Vancoppenolle, Martin Geilfus, Nicolas Xavier Tilbrook, Bronte Lannuzel, Delphine Schoemann, Véronique Becquevort, Sylvie Carnat, Gauthier Delille, D. Lancelot, Christiane Chou, Lei Dieckmann, Gerhard Tison, Jean-Louis |
author_facet |
Delille, Bruno Vancoppenolle, Martin Geilfus, Nicolas Xavier Tilbrook, Bronte Lannuzel, Delphine Schoemann, Véronique Becquevort, Sylvie Carnat, Gauthier Delille, D. Lancelot, Christiane Chou, Lei Dieckmann, Gerhard Tison, Jean-Louis |
author_sort |
Delille, Bruno |
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 |
http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/189092 https://dipot.ulb.ac.be/dspace/bitstream/2013/189092/3/189092.pdf |
geographic |
Antarctic Southern Ocean The Antarctic |
geographic_facet |
Antarctic Southern Ocean The Antarctic |
genre |
Antarc* Antarctic Sea ice Southern Ocean |
genre_facet |
Antarc* Antarctic Sea ice Southern Ocean |
op_source |
Journal of geophysical research. Oceans, 119 (9 |
op_relation |
uri/info:doi/10.1002/2014JC009941 local/http://dx.doi.org/10.1002/2014JC009941 https://dipot.ulb.ac.be/dspace/bitstream/2013/189092/3/189092.pdf http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/189092 |
op_rights |
1 full-text file(s): 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 |
_version_ |
1766163056511942656 |