Evidence of Freezing Pressure in Sea Ice Discrete Brine Inclusions and Its Impact on Aqueous-Gaseous Equilibrium
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 d...
Published in: | Journal of Geophysical Research: Oceans |
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Format: | Article in Journal/Newspaper |
Language: | English |
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2019
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Online Access: | https://pure.au.dk/portal/en/publications/f3f82369-e429-4f2c-a9f7-62ae757e9c89 https://doi.org/10.1029/2018JC014597 https://pure.au.dk/ws/files/193951148/Evidence_of_Freezing_Pressure_in_Sea_Ice_Discrete_Brine_Inclusions_and_Its_Impact_on_Aqueous_Gaseous_Equilibrium.pdf http://www.scopus.com/inward/record.url?scp=85062989686&partnerID=8YFLogxK |
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ftuniaarhuspubl:oai:pure.atira.dk:publications/f3f82369-e429-4f2c-a9f7-62ae757e9c89 2024-04-28T08:37:34+00:00 Evidence of Freezing Pressure in Sea Ice Discrete Brine Inclusions and Its Impact on Aqueous-Gaseous Equilibrium Crabeck, O. Galley, R. J. Mercury, L. Delille, B. Tison, J. L. Rysgaard, S. 2019-03 application/pdf https://pure.au.dk/portal/en/publications/f3f82369-e429-4f2c-a9f7-62ae757e9c89 https://doi.org/10.1029/2018JC014597 https://pure.au.dk/ws/files/193951148/Evidence_of_Freezing_Pressure_in_Sea_Ice_Discrete_Brine_Inclusions_and_Its_Impact_on_Aqueous_Gaseous_Equilibrium.pdf http://www.scopus.com/inward/record.url?scp=85062989686&partnerID=8YFLogxK eng eng https://pure.au.dk/portal/en/publications/f3f82369-e429-4f2c-a9f7-62ae757e9c89 info:eu-repo/semantics/openAccess Crabeck , O , Galley , R J , Mercury , L , Delille , B , Tison , J L & Rysgaard , S 2019 , ' Evidence of Freezing Pressure in Sea Ice Discrete Brine Inclusions and Its Impact on Aqueous-Gaseous Equilibrium ' , Journal of Geophysical Research: Oceans , vol. 124 , no. 3 , pp. 1660-1678 . https://doi.org/10.1029/2018JC014597 brine bubble gas O2 Ar N2 pressure sea ice VOLUME SEAWATER SOLUBILITY OXYGEN SALT TEMPERATURE GROWTH WATER article 2019 ftuniaarhuspubl https://doi.org/10.1029/2018JC014597 2024-04-10T23:43:45Z 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 1atm. 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 3atm. 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 1atm 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. Plain Language Summary Sea ice plays an important role in controlling surface water properties and the ocean-atmosphere exchange of greenhouse gases at high latitudes. Within sea ice, gas exists dissolved in brine and as air bubbles contained in liquid brine inclusions. The amount of gas dissolved in brine as well as the amount of gas contained in air bubbles depends of the aqueous-gaseous equilibrium described by the ... Article in Journal/Newspaper Sea ice Aarhus University: Research Journal of Geophysical Research: Oceans 124 3 1660 1678 |
institution |
Open Polar |
collection |
Aarhus University: Research |
op_collection_id |
ftuniaarhuspubl |
language |
English |
topic |
brine bubble gas O2 Ar N2 pressure sea ice VOLUME SEAWATER SOLUBILITY OXYGEN SALT TEMPERATURE GROWTH WATER |
spellingShingle |
brine bubble gas O2 Ar N2 pressure sea ice VOLUME SEAWATER SOLUBILITY OXYGEN SALT TEMPERATURE GROWTH WATER Crabeck, O. Galley, R. J. Mercury, L. Delille, B. Tison, J. L. Rysgaard, S. Evidence of Freezing Pressure in Sea Ice Discrete Brine Inclusions and Its Impact on Aqueous-Gaseous Equilibrium |
topic_facet |
brine bubble gas O2 Ar N2 pressure sea ice VOLUME SEAWATER SOLUBILITY OXYGEN SALT TEMPERATURE GROWTH WATER |
description |
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 1atm. 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 3atm. 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 1atm 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. Plain Language Summary Sea ice plays an important role in controlling surface water properties and the ocean-atmosphere exchange of greenhouse gases at high latitudes. Within sea ice, gas exists dissolved in brine and as air bubbles contained in liquid brine inclusions. The amount of gas dissolved in brine as well as the amount of gas contained in air bubbles depends of the aqueous-gaseous equilibrium described by the ... |
format |
Article in Journal/Newspaper |
author |
Crabeck, O. Galley, R. J. Mercury, L. Delille, B. Tison, J. L. Rysgaard, S. |
author_facet |
Crabeck, O. Galley, R. J. Mercury, L. Delille, B. Tison, J. L. Rysgaard, S. |
author_sort |
Crabeck, O. |
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 |
publishDate |
2019 |
url |
https://pure.au.dk/portal/en/publications/f3f82369-e429-4f2c-a9f7-62ae757e9c89 https://doi.org/10.1029/2018JC014597 https://pure.au.dk/ws/files/193951148/Evidence_of_Freezing_Pressure_in_Sea_Ice_Discrete_Brine_Inclusions_and_Its_Impact_on_Aqueous_Gaseous_Equilibrium.pdf http://www.scopus.com/inward/record.url?scp=85062989686&partnerID=8YFLogxK |
genre |
Sea ice |
genre_facet |
Sea ice |
op_source |
Crabeck , O , Galley , R J , Mercury , L , Delille , B , Tison , J L & Rysgaard , S 2019 , ' Evidence of Freezing Pressure in Sea Ice Discrete Brine Inclusions and Its Impact on Aqueous-Gaseous Equilibrium ' , Journal of Geophysical Research: Oceans , vol. 124 , no. 3 , pp. 1660-1678 . https://doi.org/10.1029/2018JC014597 |
op_relation |
https://pure.au.dk/portal/en/publications/f3f82369-e429-4f2c-a9f7-62ae757e9c89 |
op_rights |
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 |
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1797568938581688320 |