Investigating the role of the coupling between the ocean, the sea ice and the atmosphere in the biogeochemical cycle of CH4

The contribution of the ocean to the atmospheric methane (CH4) budget is poorly understood. In polar regions, this contribution is further influenced by the sea-ice cover. Sea ice has long been considered as an inert and impermeable barrier, but recent studies have highlighted the existence of gas f...

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Main Authors: Jacques, C., Sapart, C.J., Thornton, B., Delille, Bruno, Carnat, G., Crill, P., Gkritzalis, T., Röckmann, T., van der Veen, C.
Other Authors: FOCUS - Freshwater and OCeanic science Unit of reSearch - ULiège
Format: Conference Object
Language:English
Published: 2019
Subjects:
Online Access:https://orbi.uliege.be/handle/2268/244525
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spelling ftorbi:oai:orbi.ulg.ac.be:2268/244525 2024-04-21T08:10:50+00:00 Investigating the role of the coupling between the ocean, the sea ice and the atmosphere in the biogeochemical cycle of CH4 Jacques, C. Sapart, C.J. Thornton, B. Delille, Bruno Carnat, G. Crill, P. Gkritzalis, T. Röckmann, T. van der Veen, C. FOCUS - Freshwater and OCeanic science Unit of reSearch - ULiège 2019-08 https://orbi.uliege.be/handle/2268/244525 en eng https://orbi.uliege.be/handle/2268/244525 info:hdl:2268/244525 International Symposium on Sea ice at the Interface, Winnipeg, Canada [CA], 18-23 August 2019 Physical chemical mathematical & earth Sciences Earth sciences & physical geography Physique chimie mathématiques & sciences de la terre Sciences de la terre & géographie physique conference poster not in proceedings http://purl.org/coar/resource_type/c_18co info:eu-repo/semantics/conferencePoster 2019 ftorbi 2024-03-27T14:50:20Z The contribution of the ocean to the atmospheric methane (CH4) budget is poorly understood. In polar regions, this contribution is further influenced by the sea-ice cover. Sea ice has long been considered as an inert and impermeable barrier, but recent studies have highlighted the existence of gas fluxes at the atmosphere–sea-ice and sea-ice–seawater interfaces. These fluxes are to date poorly characterized and quantified, so that the role of sea ice as a net sink or source of CH4 is still unclear. The PIPERS (Polynyas, Ice Production, and seasonal Evolution in the Ross Sea) expedition on the icebreaker Nathaniel B. Palmer provided a unique opportunity to investigate the complex coupling between the ocean, the sea ice and the atmosphere, at the beginning of winter 2017. As the season was progressing, we could study how sea-ice formation influences the biogeochemical cycle of CH4. We performed continuous measurements of dissolved CH4 in surface waters together with CH4 mixing ratio in the atmosphere. Discrete samples were also collected both to calibrate continuous systems and to carry out subsequent stable isotope analyses. A total of 17 ice cores dedicated to CH4 concentration measurements were drilled in the Ross Sea pack ice and in the vicinity of the Terra Nova Bay polynya. Additional analyses, such as characterization of ice texture and physical properties, were conducted on these cores. This multiparametric dataset will allows us to determine the distribution of CH4 between the ocean, the sea ice and the atmosphere during sea-ice formation and help us to unravel the net role of sea ice in the CH4 budget. Conference Object Ross Sea Sea ice University of Liège: ORBi (Open Repository and Bibliography)
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
Jacques, C.
Sapart, C.J.
Thornton, B.
Delille, Bruno
Carnat, G.
Crill, P.
Gkritzalis, T.
Röckmann, T.
van der Veen, C.
Investigating the role of the coupling between the ocean, the sea ice and the atmosphere in the biogeochemical cycle of CH4
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 The contribution of the ocean to the atmospheric methane (CH4) budget is poorly understood. In polar regions, this contribution is further influenced by the sea-ice cover. Sea ice has long been considered as an inert and impermeable barrier, but recent studies have highlighted the existence of gas fluxes at the atmosphere–sea-ice and sea-ice–seawater interfaces. These fluxes are to date poorly characterized and quantified, so that the role of sea ice as a net sink or source of CH4 is still unclear. The PIPERS (Polynyas, Ice Production, and seasonal Evolution in the Ross Sea) expedition on the icebreaker Nathaniel B. Palmer provided a unique opportunity to investigate the complex coupling between the ocean, the sea ice and the atmosphere, at the beginning of winter 2017. As the season was progressing, we could study how sea-ice formation influences the biogeochemical cycle of CH4. We performed continuous measurements of dissolved CH4 in surface waters together with CH4 mixing ratio in the atmosphere. Discrete samples were also collected both to calibrate continuous systems and to carry out subsequent stable isotope analyses. A total of 17 ice cores dedicated to CH4 concentration measurements were drilled in the Ross Sea pack ice and in the vicinity of the Terra Nova Bay polynya. Additional analyses, such as characterization of ice texture and physical properties, were conducted on these cores. This multiparametric dataset will allows us to determine the distribution of CH4 between the ocean, the sea ice and the atmosphere during sea-ice formation and help us to unravel the net role of sea ice in the CH4 budget.
author2 FOCUS - Freshwater and OCeanic science Unit of reSearch - ULiège
format Conference Object
author Jacques, C.
Sapart, C.J.
Thornton, B.
Delille, Bruno
Carnat, G.
Crill, P.
Gkritzalis, T.
Röckmann, T.
van der Veen, C.
author_facet Jacques, C.
Sapart, C.J.
Thornton, B.
Delille, Bruno
Carnat, G.
Crill, P.
Gkritzalis, T.
Röckmann, T.
van der Veen, C.
author_sort Jacques, C.
title Investigating the role of the coupling between the ocean, the sea ice and the atmosphere in the biogeochemical cycle of CH4
title_short Investigating the role of the coupling between the ocean, the sea ice and the atmosphere in the biogeochemical cycle of CH4
title_full Investigating the role of the coupling between the ocean, the sea ice and the atmosphere in the biogeochemical cycle of CH4
title_fullStr Investigating the role of the coupling between the ocean, the sea ice and the atmosphere in the biogeochemical cycle of CH4
title_full_unstemmed Investigating the role of the coupling between the ocean, the sea ice and the atmosphere in the biogeochemical cycle of CH4
title_sort investigating the role of the coupling between the ocean, the sea ice and the atmosphere in the biogeochemical cycle of ch4
publishDate 2019
url https://orbi.uliege.be/handle/2268/244525
genre Ross Sea
Sea ice
genre_facet Ross Sea
Sea ice
op_source International Symposium on Sea ice at the Interface, Winnipeg, Canada [CA], 18-23 August 2019
op_relation https://orbi.uliege.be/handle/2268/244525
info:hdl:2268/244525
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