Drivers of inorganic carbon dynamics in first year sea ice: A model study
Sea ice is an active source or a sink for carbon dioxide (CO2), although to what extent is not clear. Here, we analyze CO2 dynamics within sea ice using a one-dimensional halothermodynamic sea ice model including gas physics and carbon biogeochemistry. The ice-ocean fluxes, and vertical transport, o...
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ftunivbruxelles:oai:dipot.ulb.ac.be:2013/191798 2023-05-15T15:39:42+02:00 Drivers of inorganic carbon dynamics in first year sea ice: A model study Moreau, Sébastien Vancoppenolle, Martin Delille, Bruno Tison, Jean-Louis Zhou, Jiayun Kotovitch, Marie Thomas, D. R. Geilfus, Nicolas Xavier Goosse, Hugues 2015-01-29 No full-text files http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/191798 en eng uri/info:doi/10.1002/2014JC010388 uri/info:scp/84923257335 http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/191798 Journal of Geophysical Research: Oceans, 120 Sciences exactes et naturelles biogeochemistry modeling sea ice info:eu-repo/semantics/article info:ulb-repo/semantics/articlePeerReview info:ulb-repo/semantics/openurl/article 2015 ftunivbruxelles 2022-06-12T20:33:42Z Sea ice is an active source or a sink for carbon dioxide (CO2), although to what extent is not clear. Here, we analyze CO2 dynamics within sea ice using a one-dimensional halothermodynamic sea ice model including gas physics and carbon biogeochemistry. The ice-ocean fluxes, and vertical transport, of total dissolved inorganic carbon (DIC) and total alkalinity (TA) are represented using fluid transport equations. Carbonate chemistry, the consumption, and release of CO2 by primary production and respiration, the precipitation and dissolution of ikaite (CaCO3·6H2O) and ice-air CO2 fluxes, are also included. The model is evaluated using observations from a 6 month field study at Point Barrow, Alaska, and an ice-tank experiment. At Barrow, results show that the DIC budget is mainly driven by physical processes, wheras brine-air CO2 fluxes, ikaite formation, and net primary production, are secondary factors. In terms of ice-atmosphere CO2 exchanges, sea ice is a net CO2 source and sink in winter and summer, respectively. The formulation of the ice-atmosphere CO2 flux impacts the simulated near-surface CO2 partial pressure (pCO2), but not the DIC budget. Because the simulated ice-atmosphere CO2 fluxes are limited by DIC stocks, and therefore <2 mmol m-2 d-1, we argue that the observed much larger CO2 fluxes from eddy covariance retrievals cannot be explained by a sea ice direct source and must involve other processes or other sources of CO2. Finally, the simulations suggest that near-surface TA/DIC ratios of ∼2, sometimes used as an indicator of calcification, would rather suggest outgassing. SCOPUS: ar.j SCOPUS: ar.j info:eu-repo/semantics/published Article in Journal/Newspaper Barrow Point Barrow Sea ice Alaska 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 biogeochemistry modeling sea ice |
spellingShingle |
Sciences exactes et naturelles biogeochemistry modeling sea ice Moreau, Sébastien Vancoppenolle, Martin Delille, Bruno Tison, Jean-Louis Zhou, Jiayun Kotovitch, Marie Thomas, D. R. Geilfus, Nicolas Xavier Goosse, Hugues Drivers of inorganic carbon dynamics in first year sea ice: A model study |
topic_facet |
Sciences exactes et naturelles biogeochemistry modeling sea ice |
description |
Sea ice is an active source or a sink for carbon dioxide (CO2), although to what extent is not clear. Here, we analyze CO2 dynamics within sea ice using a one-dimensional halothermodynamic sea ice model including gas physics and carbon biogeochemistry. The ice-ocean fluxes, and vertical transport, of total dissolved inorganic carbon (DIC) and total alkalinity (TA) are represented using fluid transport equations. Carbonate chemistry, the consumption, and release of CO2 by primary production and respiration, the precipitation and dissolution of ikaite (CaCO3·6H2O) and ice-air CO2 fluxes, are also included. The model is evaluated using observations from a 6 month field study at Point Barrow, Alaska, and an ice-tank experiment. At Barrow, results show that the DIC budget is mainly driven by physical processes, wheras brine-air CO2 fluxes, ikaite formation, and net primary production, are secondary factors. In terms of ice-atmosphere CO2 exchanges, sea ice is a net CO2 source and sink in winter and summer, respectively. The formulation of the ice-atmosphere CO2 flux impacts the simulated near-surface CO2 partial pressure (pCO2), but not the DIC budget. Because the simulated ice-atmosphere CO2 fluxes are limited by DIC stocks, and therefore <2 mmol m-2 d-1, we argue that the observed much larger CO2 fluxes from eddy covariance retrievals cannot be explained by a sea ice direct source and must involve other processes or other sources of CO2. Finally, the simulations suggest that near-surface TA/DIC ratios of ∼2, sometimes used as an indicator of calcification, would rather suggest outgassing. SCOPUS: ar.j SCOPUS: ar.j info:eu-repo/semantics/published |
format |
Article in Journal/Newspaper |
author |
Moreau, Sébastien Vancoppenolle, Martin Delille, Bruno Tison, Jean-Louis Zhou, Jiayun Kotovitch, Marie Thomas, D. R. Geilfus, Nicolas Xavier Goosse, Hugues |
author_facet |
Moreau, Sébastien Vancoppenolle, Martin Delille, Bruno Tison, Jean-Louis Zhou, Jiayun Kotovitch, Marie Thomas, D. R. Geilfus, Nicolas Xavier Goosse, Hugues |
author_sort |
Moreau, Sébastien |
title |
Drivers of inorganic carbon dynamics in first year sea ice: A model study |
title_short |
Drivers of inorganic carbon dynamics in first year sea ice: A model study |
title_full |
Drivers of inorganic carbon dynamics in first year sea ice: A model study |
title_fullStr |
Drivers of inorganic carbon dynamics in first year sea ice: A model study |
title_full_unstemmed |
Drivers of inorganic carbon dynamics in first year sea ice: A model study |
title_sort |
drivers of inorganic carbon dynamics in first year sea ice: a model study |
publishDate |
2015 |
url |
http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/191798 |
genre |
Barrow Point Barrow Sea ice Alaska |
genre_facet |
Barrow Point Barrow Sea ice Alaska |
op_source |
Journal of Geophysical Research: Oceans, 120 |
op_relation |
uri/info:doi/10.1002/2014JC010388 uri/info:scp/84923257335 http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/191798 |
_version_ |
1766371758071349248 |