Evidence of freezing pressure in sea ice discrete brine inclusions and its impact on aqueous-gaseous equilibrium
peer reviewed Sea ice in part controls surface water properties and the ocean-atmosphere exchange of greenhouse gases at high latitudes. In sea ice gas exists dissolved in brine and as air bubbles contained in liquid brine inclusions, or as bubbles trapped directly within the ice matrix. Current res...
Published in: | Journal of Geophysical Research: Oceans |
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Online Access: | https://orbi.uliege.be/handle/2268/232173 https://orbi.uliege.be/bitstream/2268/232173/1/AGU-018JC014597R-3.pdf https://doi.org/10.1029/2018JC014597 |
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ftorbi:oai:orbi.ulg.ac.be:2268/232173 2024-10-13T14:10:41+00:00 Evidence of freezing pressure in sea ice discrete brine inclusions and its impact on aqueous-gaseous equilibrium Crabeck, Odile Galley, R.J. Mercury, L. Delille, Bruno Tison, J.-L. Rysgaard, S. FOCUS - Freshwater and OCeanic science Unit of reSearch - ULiège 2019-02 https://orbi.uliege.be/handle/2268/232173 https://orbi.uliege.be/bitstream/2268/232173/1/AGU-018JC014597R-3.pdf https://doi.org/10.1029/2018JC014597 en eng Wiley urn:issn:2169-9275 urn:issn:2169-9291 https://orbi.uliege.be/handle/2268/232173 info:hdl:2268/232173 doi:10.1029/2018JC014597 open access http://purl.org/coar/access_right/c_abf2 info:eu-repo/semantics/openAccess Journal of Geophysical Research. Oceans, 124 (2019-02) Physical chemical mathematical & earth Sciences Earth sciences & physical geography Physique chimie mathématiques & sciences de la terre Sciences de la terre & géographie physique journal article http://purl.org/coar/resource_type/c_6501 info:eu-repo/semantics/article peer reviewed 2019 ftorbi https://doi.org/10.1029/2018JC014597 2024-09-27T07:01:43Z peer reviewed Sea ice in part controls surface water properties and the ocean-atmosphere exchange of greenhouse gases at high latitudes. In sea ice gas exists dissolved in brine and as air bubbles contained in liquid brine inclusions, or as bubbles trapped directly within the ice matrix. Current research on gas dynamics within the ocean-sea ice-atmosphere interface has been based on the premise that brine with dissolved air becomes supersaturated with respect to the atmosphere during ice growth. Based on Henry’s Law, gas bubbles within brine should grow when brine reaches saturation during cooling, given that the total partial pressure of atmospheric gases is above the implicit pressure in brine of 1 atm. Using high-resolution light microscopy time series imagery of gas bubble evolution inside discrete brine pockets, we observed bubbles shrinking during cooling events in response to the development of freezing pressure above 3 atm. During warming of discrete brine pockets, existing bubbles expand and new bubbles nucleate in response to depressurization. Pressure variation within these inclusions has direct impacts on aqueous-gaseous equilibrium, indicating that Henry's Law at a constant pressure of 1 atm is inadequate to assess the partitioning between dissolved and gaseous fractions of gas in sea ice. This new evidence of pressure build-up in discrete brine inclusions controlling the solubility of gas and nucleation of bubbles in these inclusions has the potential to affect the transport pathways of air bubbles and dissolved gases within sea ice-ocean-atmosphere interface and modifies brine biochemical properties. Article in Journal/Newspaper Sea ice University of Liège: ORBi (Open Repository and Bibliography) Journal of Geophysical Research: Oceans 124 3 1660 1678 |
institution |
Open Polar |
collection |
University of Liège: ORBi (Open Repository and Bibliography) |
op_collection_id |
ftorbi |
language |
English |
topic |
Physical chemical mathematical & earth Sciences Earth sciences & physical geography Physique chimie mathématiques & sciences de la terre Sciences de la terre & géographie physique |
spellingShingle |
Physical chemical mathematical & earth Sciences Earth sciences & physical geography Physique chimie mathématiques & sciences de la terre Sciences de la terre & géographie physique Crabeck, Odile Galley, R.J. Mercury, L. Delille, Bruno Tison, J.-L. Rysgaard, S. Evidence of freezing pressure in sea ice discrete brine inclusions and its impact on aqueous-gaseous equilibrium |
topic_facet |
Physical chemical mathematical & earth Sciences Earth sciences & physical geography Physique chimie mathématiques & sciences de la terre Sciences de la terre & géographie physique |
description |
peer reviewed Sea ice in part controls surface water properties and the ocean-atmosphere exchange of greenhouse gases at high latitudes. In sea ice gas exists dissolved in brine and as air bubbles contained in liquid brine inclusions, or as bubbles trapped directly within the ice matrix. Current research on gas dynamics within the ocean-sea ice-atmosphere interface has been based on the premise that brine with dissolved air becomes supersaturated with respect to the atmosphere during ice growth. Based on Henry’s Law, gas bubbles within brine should grow when brine reaches saturation during cooling, given that the total partial pressure of atmospheric gases is above the implicit pressure in brine of 1 atm. Using high-resolution light microscopy time series imagery of gas bubble evolution inside discrete brine pockets, we observed bubbles shrinking during cooling events in response to the development of freezing pressure above 3 atm. During warming of discrete brine pockets, existing bubbles expand and new bubbles nucleate in response to depressurization. Pressure variation within these inclusions has direct impacts on aqueous-gaseous equilibrium, indicating that Henry's Law at a constant pressure of 1 atm is inadequate to assess the partitioning between dissolved and gaseous fractions of gas in sea ice. This new evidence of pressure build-up in discrete brine inclusions controlling the solubility of gas and nucleation of bubbles in these inclusions has the potential to affect the transport pathways of air bubbles and dissolved gases within sea ice-ocean-atmosphere interface and modifies brine biochemical properties. |
author2 |
FOCUS - Freshwater and OCeanic science Unit of reSearch - ULiège |
format |
Article in Journal/Newspaper |
author |
Crabeck, Odile Galley, R.J. Mercury, L. Delille, Bruno Tison, J.-L. Rysgaard, S. |
author_facet |
Crabeck, Odile Galley, R.J. Mercury, L. Delille, Bruno Tison, J.-L. Rysgaard, S. |
author_sort |
Crabeck, Odile |
title |
Evidence of freezing pressure in sea ice discrete brine inclusions and its impact on aqueous-gaseous equilibrium |
title_short |
Evidence of freezing pressure in sea ice discrete brine inclusions and its impact on aqueous-gaseous equilibrium |
title_full |
Evidence of freezing pressure in sea ice discrete brine inclusions and its impact on aqueous-gaseous equilibrium |
title_fullStr |
Evidence of freezing pressure in sea ice discrete brine inclusions and its impact on aqueous-gaseous equilibrium |
title_full_unstemmed |
Evidence of freezing pressure in sea ice discrete brine inclusions and its impact on aqueous-gaseous equilibrium |
title_sort |
evidence of freezing pressure in sea ice discrete brine inclusions and its impact on aqueous-gaseous equilibrium |
publisher |
Wiley |
publishDate |
2019 |
url |
https://orbi.uliege.be/handle/2268/232173 https://orbi.uliege.be/bitstream/2268/232173/1/AGU-018JC014597R-3.pdf https://doi.org/10.1029/2018JC014597 |
genre |
Sea ice |
genre_facet |
Sea ice |
op_source |
Journal of Geophysical Research. Oceans, 124 (2019-02) |
op_relation |
urn:issn:2169-9275 urn:issn:2169-9291 https://orbi.uliege.be/handle/2268/232173 info:hdl:2268/232173 doi:10.1029/2018JC014597 |
op_rights |
open access http://purl.org/coar/access_right/c_abf2 info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1029/2018JC014597 |
container_title |
Journal of Geophysical Research: Oceans |
container_volume |
124 |
container_issue |
3 |
container_start_page |
1660 |
op_container_end_page |
1678 |
_version_ |
1812818063544811520 |