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 (CO 2 ), although to what extent is not clear. Here, we analyze CO 2 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...
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ftvliz:oai:oma.vliz.be:246792 2023-05-15T15:39:42+02:00 Drivers of inorganic carbon dynamics in first-year sea ice: a model study Moreau, S. Vancoppenolle, M. Delille, B. Tison, J.-L. Zhou, J. Kotovitch, M. Thomas, N Geilfus, X Goosse, H. 2015 http://www.vliz.be/nl/open-marien-archief?module=ref&refid=246792 en eng info:eu-repo/semantics/altIdentifier/wos/000349890000028 info:eu-repo/semantics/altIdentifier/doi/doi.org/10.1002/2014JC010388 http://www.vliz.be/nl/open-marien-archief?module=ref&refid=246792 info:eu-repo/semantics/restrictedAccess %3Ci%3EJ.+Geophys.+Res.+Oceans%28120%29%3C%2Fi%3E%3A+471-495.+%3Ca+href%3D%22https%3A%2F%2Fdx.doi.org%2F10.1002%2F2014JC010388%22+target%3D%22_blank%22%3Ehttps%3A%2F%2Fdx.doi.org%2F10.1002%2F2014JC010388%3C%2Fa%3E info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2015 ftvliz https://doi.org/10.1002/2014JC010388 2022-05-01T10:25:57Z Sea ice is an active source or a sink for carbon dioxide (CO 2 ), although to what extent is not clear. Here, we analyze CO 2 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 CO 2 by primary production and respiration, the precipitation and dissolution of ikaite (CaCO 3 ·6H 2 O) and ice-air CO 2 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 CO 2 fluxes, ikaite formation, and net primary production, are secondary factors. In terms of ice-atmosphere CO 2 exchanges, sea ice is a net CO 2 source and sink in winter and summer, respectively. The formulation of the ice-atmosphere CO 2 flux impacts the simulated near-surface CO 2 partial pressure ( p CO 2 ), but not the DIC budget. Because the simulated ice-atmosphere CO 2 fluxes are limited by DIC stocks, and therefore <2 mmol m -2 d -1 , we argue that the observed much larger CO 2 fluxes from eddy covariance retrievals cannot be explained by a sea ice direct source and must involve other processes or other sources of CO 2 . Finally, the simulations suggest that near-surface TA/DIC ratios of ~2, sometimes used as an indicator of calcification, would rather suggest outgassing. Article in Journal/Newspaper Barrow Point Barrow Sea ice Alaska Flanders Marine Institute (VLIZ): Open Marine Archive (OMA) Journal of Geophysical Research: Oceans 120 1 471 495 |
institution |
Open Polar |
collection |
Flanders Marine Institute (VLIZ): Open Marine Archive (OMA) |
op_collection_id |
ftvliz |
language |
English |
description |
Sea ice is an active source or a sink for carbon dioxide (CO 2 ), although to what extent is not clear. Here, we analyze CO 2 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 CO 2 by primary production and respiration, the precipitation and dissolution of ikaite (CaCO 3 ·6H 2 O) and ice-air CO 2 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 CO 2 fluxes, ikaite formation, and net primary production, are secondary factors. In terms of ice-atmosphere CO 2 exchanges, sea ice is a net CO 2 source and sink in winter and summer, respectively. The formulation of the ice-atmosphere CO 2 flux impacts the simulated near-surface CO 2 partial pressure ( p CO 2 ), but not the DIC budget. Because the simulated ice-atmosphere CO 2 fluxes are limited by DIC stocks, and therefore <2 mmol m -2 d -1 , we argue that the observed much larger CO 2 fluxes from eddy covariance retrievals cannot be explained by a sea ice direct source and must involve other processes or other sources of CO 2 . Finally, the simulations suggest that near-surface TA/DIC ratios of ~2, sometimes used as an indicator of calcification, would rather suggest outgassing. |
format |
Article in Journal/Newspaper |
author |
Moreau, S. Vancoppenolle, M. Delille, B. Tison, J.-L. Zhou, J. Kotovitch, M. Thomas, N Geilfus, X Goosse, H. |
spellingShingle |
Moreau, S. Vancoppenolle, M. Delille, B. Tison, J.-L. Zhou, J. Kotovitch, M. Thomas, N Geilfus, X Goosse, H. Drivers of inorganic carbon dynamics in first-year sea ice: a model study |
author_facet |
Moreau, S. Vancoppenolle, M. Delille, B. Tison, J.-L. Zhou, J. Kotovitch, M. Thomas, N Geilfus, X Goosse, H. |
author_sort |
Moreau, S. |
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://www.vliz.be/nl/open-marien-archief?module=ref&refid=246792 |
genre |
Barrow Point Barrow Sea ice Alaska |
genre_facet |
Barrow Point Barrow Sea ice Alaska |
op_source |
%3Ci%3EJ.+Geophys.+Res.+Oceans%28120%29%3C%2Fi%3E%3A+471-495.+%3Ca+href%3D%22https%3A%2F%2Fdx.doi.org%2F10.1002%2F2014JC010388%22+target%3D%22_blank%22%3Ehttps%3A%2F%2Fdx.doi.org%2F10.1002%2F2014JC010388%3C%2Fa%3E |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/000349890000028 info:eu-repo/semantics/altIdentifier/doi/doi.org/10.1002/2014JC010388 http://www.vliz.be/nl/open-marien-archief?module=ref&refid=246792 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1002/2014JC010388 |
container_title |
Journal of Geophysical Research: Oceans |
container_volume |
120 |
container_issue |
1 |
container_start_page |
471 |
op_container_end_page |
495 |
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1766371759170256896 |