Sea Ice CO2 Dynamics Across Seasons: Impact of Processes at the Interfaces
Winter to summer CO2 dynamics within landfast sea ice in McMurdo Sound (Antarctica) were investigated using bulk ice pCO2 measurements, air-snow-ice CO2 fluxes, dissolved inorganic carbon (DIC), total alkalinity (TA), and ikaite saturation state. Our results suggest depth-dependent biotic and abioti...
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ftunivbruxelles:oai:dipot.ulb.ac.be:2013/308566 2024-04-28T07:56:49+00:00 Sea Ice CO2 Dynamics Across Seasons: Impact of Processes at the Interfaces Van Der Linden, Fanny Tison, Jean-Louis Champenois, W. Moreau, Sébastien Carnat, Gauthier Kotovitch, Marie Fripiat, François Deman, Florian Roukaerts, Arnout Dehairs, F. Wauthy, Sarah Lourenço, A. Vivier, Frédéric Haskell, T.G. Delille, B. 2020-06-01 1 full-text file(s): application/pdf http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/308566 https://dipot.ulb.ac.be/dspace/bitstream/2013/308566/3/Vanderlinden-revised-final.pdf en eng uri/info:doi/10.1029/2019JC015807 uri/info:scp/85087511405 https://dipot.ulb.ac.be/dspace/bitstream/2013/308566/3/Vanderlinden-revised-final.pdf http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/308566 1 full-text file(s): info:eu-repo/semantics/openAccess Journal of geophysical research. Oceans, 125 (6 Sciences exactes et naturelles air-sea ice fluxes Antarctica biofilm carbon dioxide sea ice trophic status info:eu-repo/semantics/article info:ulb-repo/semantics/articlePeerReview info:ulb-repo/semantics/openurl/article 2020 ftunivbruxelles 2024-04-10T00:08:55Z Winter to summer CO2 dynamics within landfast sea ice in McMurdo Sound (Antarctica) were investigated using bulk ice pCO2 measurements, air-snow-ice CO2 fluxes, dissolved inorganic carbon (DIC), total alkalinity (TA), and ikaite saturation state. Our results suggest depth-dependent biotic and abiotic controls that led us to discriminate the ice column in three layers. At the surface, winter pCO2 supersaturation drove CO2 release to the atmosphere while spring-summer pCO2 undersaturation led to CO2 uptake most of the time. CO2 fluxes showed a diel pattern superimposed upon this seasonal pattern which was potentially assigned to either ice skin freeze-thaw cycles or diel changes in net community production. In the ice interior, the pCO2 decrease across the season was driven by physical processes, mainly independent of the autotrophic and heterotrophic phases. Bottom sea ice was characterized by a massive biomass build-up counterintuitively associated with transient heterotrophic activity and nitrate plus nitrite accumulation. This inconsistency is likely related to the formation of a biofilm. This biofilm hosts both autotrophic and heterotrophic activities at the bottom of the ice during spring and may promote calcium carbonate precipitation. SCOPUS: ar.j info:eu-repo/semantics/published Article in Journal/Newspaper Antarc* Antarctica McMurdo Sound Sea ice DI-fusion : dépôt institutionnel de l'Université libre de Bruxelles (ULB) |
institution |
Open Polar |
collection |
DI-fusion : dépôt institutionnel de l'Université libre de Bruxelles (ULB) |
op_collection_id |
ftunivbruxelles |
language |
English |
topic |
Sciences exactes et naturelles air-sea ice fluxes Antarctica biofilm carbon dioxide sea ice trophic status |
spellingShingle |
Sciences exactes et naturelles air-sea ice fluxes Antarctica biofilm carbon dioxide sea ice trophic status Van Der Linden, Fanny Tison, Jean-Louis Champenois, W. Moreau, Sébastien Carnat, Gauthier Kotovitch, Marie Fripiat, François Deman, Florian Roukaerts, Arnout Dehairs, F. Wauthy, Sarah Lourenço, A. Vivier, Frédéric Haskell, T.G. Delille, B. Sea Ice CO2 Dynamics Across Seasons: Impact of Processes at the Interfaces |
topic_facet |
Sciences exactes et naturelles air-sea ice fluxes Antarctica biofilm carbon dioxide sea ice trophic status |
description |
Winter to summer CO2 dynamics within landfast sea ice in McMurdo Sound (Antarctica) were investigated using bulk ice pCO2 measurements, air-snow-ice CO2 fluxes, dissolved inorganic carbon (DIC), total alkalinity (TA), and ikaite saturation state. Our results suggest depth-dependent biotic and abiotic controls that led us to discriminate the ice column in three layers. At the surface, winter pCO2 supersaturation drove CO2 release to the atmosphere while spring-summer pCO2 undersaturation led to CO2 uptake most of the time. CO2 fluxes showed a diel pattern superimposed upon this seasonal pattern which was potentially assigned to either ice skin freeze-thaw cycles or diel changes in net community production. In the ice interior, the pCO2 decrease across the season was driven by physical processes, mainly independent of the autotrophic and heterotrophic phases. Bottom sea ice was characterized by a massive biomass build-up counterintuitively associated with transient heterotrophic activity and nitrate plus nitrite accumulation. This inconsistency is likely related to the formation of a biofilm. This biofilm hosts both autotrophic and heterotrophic activities at the bottom of the ice during spring and may promote calcium carbonate precipitation. SCOPUS: ar.j info:eu-repo/semantics/published |
format |
Article in Journal/Newspaper |
author |
Van Der Linden, Fanny Tison, Jean-Louis Champenois, W. Moreau, Sébastien Carnat, Gauthier Kotovitch, Marie Fripiat, François Deman, Florian Roukaerts, Arnout Dehairs, F. Wauthy, Sarah Lourenço, A. Vivier, Frédéric Haskell, T.G. Delille, B. |
author_facet |
Van Der Linden, Fanny Tison, Jean-Louis Champenois, W. Moreau, Sébastien Carnat, Gauthier Kotovitch, Marie Fripiat, François Deman, Florian Roukaerts, Arnout Dehairs, F. Wauthy, Sarah Lourenço, A. Vivier, Frédéric Haskell, T.G. Delille, B. |
author_sort |
Van Der Linden, Fanny |
title |
Sea Ice CO2 Dynamics Across Seasons: Impact of Processes at the Interfaces |
title_short |
Sea Ice CO2 Dynamics Across Seasons: Impact of Processes at the Interfaces |
title_full |
Sea Ice CO2 Dynamics Across Seasons: Impact of Processes at the Interfaces |
title_fullStr |
Sea Ice CO2 Dynamics Across Seasons: Impact of Processes at the Interfaces |
title_full_unstemmed |
Sea Ice CO2 Dynamics Across Seasons: Impact of Processes at the Interfaces |
title_sort |
sea ice co2 dynamics across seasons: impact of processes at the interfaces |
publishDate |
2020 |
url |
http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/308566 https://dipot.ulb.ac.be/dspace/bitstream/2013/308566/3/Vanderlinden-revised-final.pdf |
genre |
Antarc* Antarctica McMurdo Sound Sea ice |
genre_facet |
Antarc* Antarctica McMurdo Sound Sea ice |
op_source |
Journal of geophysical research. Oceans, 125 (6 |
op_relation |
uri/info:doi/10.1029/2019JC015807 uri/info:scp/85087511405 https://dipot.ulb.ac.be/dspace/bitstream/2013/308566/3/Vanderlinden-revised-final.pdf http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/308566 |
op_rights |
1 full-text file(s): info:eu-repo/semantics/openAccess |
_version_ |
1797585105479270400 |