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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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 |
_version_ |
1796952420728700928 |