Insights into oxygen transport and net community production in sea ice from oxygen, nitrogen and argon concentrations
We present and compare the dynamics (i.e., changes in standing stocks, saturation levels and concentrations) of O 2 , Ar and N 2 in landfast sea ice, collected in Barrow (Alaska), from February through June 2009. The comparison suggests that the dynamic of O 2 in sea ice strongly depends on physical...
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ftcopernicus:oai:publications.copernicus.org:bg23559 2023-05-15T15:39:43+02:00 Insights into oxygen transport and net community production in sea ice from oxygen, nitrogen and argon concentrations Zhou, J. Delille, B. Brabant, F. Tison, J.-L. 2018-09-27 application/pdf https://doi.org/10.5194/bg-11-5007-2014 https://www.biogeosciences.net/11/5007/2014/ eng eng doi:10.5194/bg-11-5007-2014 https://www.biogeosciences.net/11/5007/2014/ eISSN: 1726-4189 Text 2018 ftcopernicus https://doi.org/10.5194/bg-11-5007-2014 2019-12-24T09:54:11Z We present and compare the dynamics (i.e., changes in standing stocks, saturation levels and concentrations) of O 2 , Ar and N 2 in landfast sea ice, collected in Barrow (Alaska), from February through June 2009. The comparison suggests that the dynamic of O 2 in sea ice strongly depends on physical processes (gas incorporation and subsequent transport). Since Ar and N 2 are only sensitive to the physical processes in the present study, we then discuss the use of O 2 / Ar and O 2 / N 2 to correct for the physical contribution to O 2 supersaturations, and to determine the net community production (NCP). We conclude that O 2 / Ar suits better than O 2 / N 2 , due to the relative abundance of O 2 , N 2 and Ar, and the lower biases when gas bubble formation and gas diffusion are maximized. We further estimate NCP in the impermeable layers during ice growth, which ranged from −6.6 to 3.6 μmol O 2 L −1 d −1 , and the concentrations of O 2 due to biological activity in the permeable layers during ice decay (3.8 to 122 μmol O 2 L −1 ). We finally highlight the key issues to solve for more accurate NCP estimates in the future. Text Barrow Sea ice Alaska Copernicus Publications: E-Journals Biogeosciences 11 18 5007 5020 |
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Open Polar |
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Copernicus Publications: E-Journals |
op_collection_id |
ftcopernicus |
language |
English |
description |
We present and compare the dynamics (i.e., changes in standing stocks, saturation levels and concentrations) of O 2 , Ar and N 2 in landfast sea ice, collected in Barrow (Alaska), from February through June 2009. The comparison suggests that the dynamic of O 2 in sea ice strongly depends on physical processes (gas incorporation and subsequent transport). Since Ar and N 2 are only sensitive to the physical processes in the present study, we then discuss the use of O 2 / Ar and O 2 / N 2 to correct for the physical contribution to O 2 supersaturations, and to determine the net community production (NCP). We conclude that O 2 / Ar suits better than O 2 / N 2 , due to the relative abundance of O 2 , N 2 and Ar, and the lower biases when gas bubble formation and gas diffusion are maximized. We further estimate NCP in the impermeable layers during ice growth, which ranged from −6.6 to 3.6 μmol O 2 L −1 d −1 , and the concentrations of O 2 due to biological activity in the permeable layers during ice decay (3.8 to 122 μmol O 2 L −1 ). We finally highlight the key issues to solve for more accurate NCP estimates in the future. |
format |
Text |
author |
Zhou, J. Delille, B. Brabant, F. Tison, J.-L. |
spellingShingle |
Zhou, J. Delille, B. Brabant, F. Tison, J.-L. Insights into oxygen transport and net community production in sea ice from oxygen, nitrogen and argon concentrations |
author_facet |
Zhou, J. Delille, B. Brabant, F. Tison, J.-L. |
author_sort |
Zhou, J. |
title |
Insights into oxygen transport and net community production in sea ice from oxygen, nitrogen and argon concentrations |
title_short |
Insights into oxygen transport and net community production in sea ice from oxygen, nitrogen and argon concentrations |
title_full |
Insights into oxygen transport and net community production in sea ice from oxygen, nitrogen and argon concentrations |
title_fullStr |
Insights into oxygen transport and net community production in sea ice from oxygen, nitrogen and argon concentrations |
title_full_unstemmed |
Insights into oxygen transport and net community production in sea ice from oxygen, nitrogen and argon concentrations |
title_sort |
insights into oxygen transport and net community production in sea ice from oxygen, nitrogen and argon concentrations |
publishDate |
2018 |
url |
https://doi.org/10.5194/bg-11-5007-2014 https://www.biogeosciences.net/11/5007/2014/ |
genre |
Barrow Sea ice Alaska |
genre_facet |
Barrow Sea ice Alaska |
op_source |
eISSN: 1726-4189 |
op_relation |
doi:10.5194/bg-11-5007-2014 https://www.biogeosciences.net/11/5007/2014/ |
op_doi |
https://doi.org/10.5194/bg-11-5007-2014 |
container_title |
Biogeosciences |
container_volume |
11 |
container_issue |
18 |
container_start_page |
5007 |
op_container_end_page |
5020 |
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1766371771672428544 |