Modeling argon dynamics in first-year sea ice
Recent studies suggest an active role of sea ice as a source or sink for climatically significant gases such as CO2 and dimethylsulfide (DMS). In this context, modelling can help to understand and upscale the physical and biogeochemical processes that affect gas production, consumption and transport...
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ftunistlouisbrus:oai:dial.uclouvain.be:boreal:122254 2024-05-12T08:01:44+00:00 Modeling argon dynamics in first-year sea ice Moreau, Sébastien Vancoppenolle, Martin Zhou, Jiayun Tison, Jean-Louis Delille, Bruno Goosse, Hugues UCL - SST/ELI/ELIC - Earth & Climate 2013 http://hdl.handle.net/2078.1/122254 eng eng Elsevier Inc. boreal:122254 http://hdl.handle.net/2078.1/122254 urn:ISSN:1463-5003 urn:EISSN:1463-5011 Ocean Modelling Argon Sea ice Modelling Gas bubbles Gas exchange info:eu-repo/semantics/article 2013 ftunistlouisbrus 2024-04-18T18:02:24Z Recent studies suggest an active role of sea ice as a source or sink for climatically significant gases such as CO2 and dimethylsulfide (DMS). In this context, modelling can help to understand and upscale the physical and biogeochemical processes that affect gas production, consumption and transport within sea ice. Focusing on physical processes, we aim at constraining the dynamics of Argon (Ar), a biogeochemically inert gas, within first year sea ice, using observation data and a one-dimensional halo-thermodynamic sea ice model, including parameterization of gas physics. The incorporation and transport of dissolved Ar within sea ice and its rejection via gas-enriched brine drainage to the ocean, are modeled following fluid transport equations through sea ice. Gas bubbles nucleate within sea ice when Ar is above saturation and when the total partial pressure of all four major atmospheric gases (N2, O2, Ar and CO2) is above the brine hydrostatic pressure.The uplift of gas bubbles due to buoyancy is allowed when the brine network is connected with a brine volume above a given threshold. Ice-atmosphere Ar fluxes are formulated as a diffusive process proportional to the differential partial pressure of Ar between brine inclusions and the atmosphere. Twosimulations corresponding to twocase studies that took place at Point Barrow (Alaska, 2009) and during an ice-tank experiment (INTERICE IV, Hamburg, Germany, 2009) are presented. Basal entrapment and vertical transport due to brine motion enable a qualitatively sound representation of the vertical profile of the total Ar (i.e. the Ar dissolved in brine inclusions and contained in gas bubbles; TAr). Sensitivity analyses suggest that gas bubbles nucleation and rise are of most importance to describe gas dynamics within sea ice. Ice-atmosphere Ar fluxes and the associated parameters do not drastically change the simulated TAr. Ar dynamics are dominated by uptake, transport by brine dynamics and bubble nucleation in winter and early spring; and by an intense and rapid ... Article in Journal/Newspaper Barrow Point Barrow Sea ice Alaska DIAL@USL-B (Université Saint-Louis, Bruxelles) |
institution |
Open Polar |
collection |
DIAL@USL-B (Université Saint-Louis, Bruxelles) |
op_collection_id |
ftunistlouisbrus |
language |
English |
topic |
Argon Sea ice Modelling Gas bubbles Gas exchange |
spellingShingle |
Argon Sea ice Modelling Gas bubbles Gas exchange Moreau, Sébastien Vancoppenolle, Martin Zhou, Jiayun Tison, Jean-Louis Delille, Bruno Goosse, Hugues Modeling argon dynamics in first-year sea ice |
topic_facet |
Argon Sea ice Modelling Gas bubbles Gas exchange |
description |
Recent studies suggest an active role of sea ice as a source or sink for climatically significant gases such as CO2 and dimethylsulfide (DMS). In this context, modelling can help to understand and upscale the physical and biogeochemical processes that affect gas production, consumption and transport within sea ice. Focusing on physical processes, we aim at constraining the dynamics of Argon (Ar), a biogeochemically inert gas, within first year sea ice, using observation data and a one-dimensional halo-thermodynamic sea ice model, including parameterization of gas physics. The incorporation and transport of dissolved Ar within sea ice and its rejection via gas-enriched brine drainage to the ocean, are modeled following fluid transport equations through sea ice. Gas bubbles nucleate within sea ice when Ar is above saturation and when the total partial pressure of all four major atmospheric gases (N2, O2, Ar and CO2) is above the brine hydrostatic pressure.The uplift of gas bubbles due to buoyancy is allowed when the brine network is connected with a brine volume above a given threshold. Ice-atmosphere Ar fluxes are formulated as a diffusive process proportional to the differential partial pressure of Ar between brine inclusions and the atmosphere. Twosimulations corresponding to twocase studies that took place at Point Barrow (Alaska, 2009) and during an ice-tank experiment (INTERICE IV, Hamburg, Germany, 2009) are presented. Basal entrapment and vertical transport due to brine motion enable a qualitatively sound representation of the vertical profile of the total Ar (i.e. the Ar dissolved in brine inclusions and contained in gas bubbles; TAr). Sensitivity analyses suggest that gas bubbles nucleation and rise are of most importance to describe gas dynamics within sea ice. Ice-atmosphere Ar fluxes and the associated parameters do not drastically change the simulated TAr. Ar dynamics are dominated by uptake, transport by brine dynamics and bubble nucleation in winter and early spring; and by an intense and rapid ... |
author2 |
UCL - SST/ELI/ELIC - Earth & Climate |
format |
Article in Journal/Newspaper |
author |
Moreau, Sébastien Vancoppenolle, Martin Zhou, Jiayun Tison, Jean-Louis Delille, Bruno Goosse, Hugues |
author_facet |
Moreau, Sébastien Vancoppenolle, Martin Zhou, Jiayun Tison, Jean-Louis Delille, Bruno Goosse, Hugues |
author_sort |
Moreau, Sébastien |
title |
Modeling argon dynamics in first-year sea ice |
title_short |
Modeling argon dynamics in first-year sea ice |
title_full |
Modeling argon dynamics in first-year sea ice |
title_fullStr |
Modeling argon dynamics in first-year sea ice |
title_full_unstemmed |
Modeling argon dynamics in first-year sea ice |
title_sort |
modeling argon dynamics in first-year sea ice |
publisher |
Elsevier Inc. |
publishDate |
2013 |
url |
http://hdl.handle.net/2078.1/122254 |
genre |
Barrow Point Barrow Sea ice Alaska |
genre_facet |
Barrow Point Barrow Sea ice Alaska |
op_source |
Ocean Modelling |
op_relation |
boreal:122254 http://hdl.handle.net/2078.1/122254 urn:ISSN:1463-5003 urn:EISSN:1463-5011 |
_version_ |
1798843841252425728 |