Dynamics of pCO2 and related air-ice CO2 fluxes in the Arctic coastal zone (Amundsen Gulf, Beaufort Sea)
We present an Arctic seasonal survey of carbon dioxide partial pressure (pCO2) dynamics within sea ice brine and related air-ice CO 2 fluxes. The survey was carried out from early spring to the beginning of summer in the Arctic coastal waters of the Amundsen Gulf. High concentrations of pCO2 (up to...
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ftunivbruxelles:oai:dipot.ulb.ac.be:2013/129565 2023-05-15T13:22:52+02:00 Dynamics of pCO2 and related air-ice CO2 fluxes in the Arctic coastal zone (Amundsen Gulf, Beaufort Sea) Geilfus, Nicolas Xavier Carnat, Gauthier Papakyriakou, Tim Tison, Jean-Louis Else, Brent Thomas, Helmuth Shadwick, Elizabeth H. Delille, Bruno 2012 No full-text files http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/129565 en eng uri/info:doi/10.1029/2011JC007118 uri/info:scp/84856966005 http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/129565 Journal of geophysical research, 117 Glaciologie Climatologie Géographie physique Océanographie physique et chimique info:eu-repo/semantics/article info:ulb-repo/semantics/articlePeerReview info:ulb-repo/semantics/openurl/article 2012 ftunivbruxelles 2022-06-12T21:18:18Z We present an Arctic seasonal survey of carbon dioxide partial pressure (pCO2) dynamics within sea ice brine and related air-ice CO 2 fluxes. The survey was carried out from early spring to the beginning of summer in the Arctic coastal waters of the Amundsen Gulf. High concentrations of pCO2 (up to 1834 atm) were observed in the sea ice in early April as a consequence of concentration of solutes in brines, CaCO 3 precipitation and microbial respiration. CaCO3 precipitation was detected through anomalies in total alkalinity (TA) and dissolved inorganic carbon (DIC). This precipitation seems to have occurred in highly saline brine in the upper part of the ice cover and in bulk ice. As summer draws near, the ice temperature increases and brine pCO2 shifts from a large supersaturation (1834 atm) to a marked undersaturation (down to almost 0 atm). This decrease was ascribed to brine dilution by ice meltwater, dissolution of CaCO3 and photosynthesis during the sympagic algal bloom. The magnitude of the CO2 fluxes was controlled by ice temperature (through its control on brine volume and brine channels connectivity) and the concentration gradient between brine and the atmosphere. However, the state of the ice-interface clearly affects air-ice CO2 fluxes. Copyright 2012 by the American Geophysical Union. SCOPUS: ar.j info:eu-repo/semantics/published Article in Journal/Newspaper Amundsen Gulf Arctic Beaufort Sea Sea ice DI-fusion : dépôt institutionnel de l'Université libre de Bruxelles (ULB) Arctic |
institution |
Open Polar |
collection |
DI-fusion : dépôt institutionnel de l'Université libre de Bruxelles (ULB) |
op_collection_id |
ftunivbruxelles |
language |
English |
topic |
Glaciologie Climatologie Géographie physique Océanographie physique et chimique |
spellingShingle |
Glaciologie Climatologie Géographie physique Océanographie physique et chimique Geilfus, Nicolas Xavier Carnat, Gauthier Papakyriakou, Tim Tison, Jean-Louis Else, Brent Thomas, Helmuth Shadwick, Elizabeth H. Delille, Bruno Dynamics of pCO2 and related air-ice CO2 fluxes in the Arctic coastal zone (Amundsen Gulf, Beaufort Sea) |
topic_facet |
Glaciologie Climatologie Géographie physique Océanographie physique et chimique |
description |
We present an Arctic seasonal survey of carbon dioxide partial pressure (pCO2) dynamics within sea ice brine and related air-ice CO 2 fluxes. The survey was carried out from early spring to the beginning of summer in the Arctic coastal waters of the Amundsen Gulf. High concentrations of pCO2 (up to 1834 atm) were observed in the sea ice in early April as a consequence of concentration of solutes in brines, CaCO 3 precipitation and microbial respiration. CaCO3 precipitation was detected through anomalies in total alkalinity (TA) and dissolved inorganic carbon (DIC). This precipitation seems to have occurred in highly saline brine in the upper part of the ice cover and in bulk ice. As summer draws near, the ice temperature increases and brine pCO2 shifts from a large supersaturation (1834 atm) to a marked undersaturation (down to almost 0 atm). This decrease was ascribed to brine dilution by ice meltwater, dissolution of CaCO3 and photosynthesis during the sympagic algal bloom. The magnitude of the CO2 fluxes was controlled by ice temperature (through its control on brine volume and brine channels connectivity) and the concentration gradient between brine and the atmosphere. However, the state of the ice-interface clearly affects air-ice CO2 fluxes. Copyright 2012 by the American Geophysical Union. SCOPUS: ar.j info:eu-repo/semantics/published |
format |
Article in Journal/Newspaper |
author |
Geilfus, Nicolas Xavier Carnat, Gauthier Papakyriakou, Tim Tison, Jean-Louis Else, Brent Thomas, Helmuth Shadwick, Elizabeth H. Delille, Bruno |
author_facet |
Geilfus, Nicolas Xavier Carnat, Gauthier Papakyriakou, Tim Tison, Jean-Louis Else, Brent Thomas, Helmuth Shadwick, Elizabeth H. Delille, Bruno |
author_sort |
Geilfus, Nicolas Xavier |
title |
Dynamics of pCO2 and related air-ice CO2 fluxes in the Arctic coastal zone (Amundsen Gulf, Beaufort Sea) |
title_short |
Dynamics of pCO2 and related air-ice CO2 fluxes in the Arctic coastal zone (Amundsen Gulf, Beaufort Sea) |
title_full |
Dynamics of pCO2 and related air-ice CO2 fluxes in the Arctic coastal zone (Amundsen Gulf, Beaufort Sea) |
title_fullStr |
Dynamics of pCO2 and related air-ice CO2 fluxes in the Arctic coastal zone (Amundsen Gulf, Beaufort Sea) |
title_full_unstemmed |
Dynamics of pCO2 and related air-ice CO2 fluxes in the Arctic coastal zone (Amundsen Gulf, Beaufort Sea) |
title_sort |
dynamics of pco2 and related air-ice co2 fluxes in the arctic coastal zone (amundsen gulf, beaufort sea) |
publishDate |
2012 |
url |
http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/129565 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Amundsen Gulf Arctic Beaufort Sea Sea ice |
genre_facet |
Amundsen Gulf Arctic Beaufort Sea Sea ice |
op_source |
Journal of geophysical research, 117 |
op_relation |
uri/info:doi/10.1029/2011JC007118 uri/info:scp/84856966005 http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/129565 |
_version_ |
1766367560808267776 |