CO 2 and CH 4 in sea ice from a subarctic fjord under influence of riverine input
We present CH4 concentration [CH4] and the partial pressure of CO2 (pCO2) in bulk sea ice from subarctic, land-fast sea ice in the Kapisillit fjord, Greenland. The bulk ice [CH4] ranged from 1.8 to 12.1 nmol L−1, which corresponds to a partial pressure range of 3 to 28 ppmv. This is markedly higher...
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2014
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ftuniaarhuspubl:oai:pure.atira.dk:publications/8fe279bb-d4ab-415b-967a-2ff80240e59c 2024-02-11T10:01:21+01:00 CO 2 and CH 4 in sea ice from a subarctic fjord under influence of riverine input Crabeck, O. Delille, B. Thomas, D. N. Geilfus, Nicolas-Xavier Rysgaard, Søren Tison, J.-L. 2014 application/pdf https://pure.au.dk/portal/en/publications/8fe279bb-d4ab-415b-967a-2ff80240e59c https://doi.org/10.5194/bg-11-6525-2014 https://pure.au.dk/ws/files/83506038/Crabeck_et_al_2014_.pdf eng eng https://pure.au.dk/portal/en/publications/8fe279bb-d4ab-415b-967a-2ff80240e59c info:eu-repo/semantics/restrictedAccess Crabeck , O , Delille , B , Thomas , D N , Geilfus , N-X , Rysgaard , S & Tison , J-L 2014 , ' CO 2 and CH 4 in sea ice from a subarctic fjord under influence of riverine input ' , Biogeosciences , vol. 11 , pp. 6525-6538 . https://doi.org/10.5194/bg-11-6525-2014 article 2014 ftuniaarhuspubl https://doi.org/10.5194/bg-11-6525-2014 2024-01-17T23:59:21Z We present CH4 concentration [CH4] and the partial pressure of CO2 (pCO2) in bulk sea ice from subarctic, land-fast sea ice in the Kapisillit fjord, Greenland. The bulk ice [CH4] ranged from 1.8 to 12.1 nmol L−1, which corresponds to a partial pressure range of 3 to 28 ppmv. This is markedly higher than the average atmospheric methane content of 1.9 ppmv. Most of the trapped methane within the sea ice was evidently contained inside bubbles, and only a minor portion was dissolved in the brine. The bulk ice pCO2 ranged from 60 to 330 ppmv showing that sea ice at temperatures above −4 °C is under-saturated compared to the atmosphere (390 ppmv). Our study adds to the few existing studies of CH4 and CO2 in sea ice and concludes that sub-arctic sea can be a sink for atmospheric CO2, while being a net source of CH4. Processes related to the freezing and melting of sea ice represents large unknowns to the exchange of CO2 but also CH4. It is therefore imperative to assess the consequences of these unknowns through further field campaigns and targeted research under other sea ice conditions at both hemispheres. Article in Journal/Newspaper Arctic Greenland Kapisillit Sea ice Subarctic Aarhus University: Research Arctic Greenland Kapisillit ENVELOPE(-50.271,-50.271,64.435,64.435) Biogeosciences 11 23 6525 6538 |
institution |
Open Polar |
collection |
Aarhus University: Research |
op_collection_id |
ftuniaarhuspubl |
language |
English |
description |
We present CH4 concentration [CH4] and the partial pressure of CO2 (pCO2) in bulk sea ice from subarctic, land-fast sea ice in the Kapisillit fjord, Greenland. The bulk ice [CH4] ranged from 1.8 to 12.1 nmol L−1, which corresponds to a partial pressure range of 3 to 28 ppmv. This is markedly higher than the average atmospheric methane content of 1.9 ppmv. Most of the trapped methane within the sea ice was evidently contained inside bubbles, and only a minor portion was dissolved in the brine. The bulk ice pCO2 ranged from 60 to 330 ppmv showing that sea ice at temperatures above −4 °C is under-saturated compared to the atmosphere (390 ppmv). Our study adds to the few existing studies of CH4 and CO2 in sea ice and concludes that sub-arctic sea can be a sink for atmospheric CO2, while being a net source of CH4. Processes related to the freezing and melting of sea ice represents large unknowns to the exchange of CO2 but also CH4. It is therefore imperative to assess the consequences of these unknowns through further field campaigns and targeted research under other sea ice conditions at both hemispheres. |
format |
Article in Journal/Newspaper |
author |
Crabeck, O. Delille, B. Thomas, D. N. Geilfus, Nicolas-Xavier Rysgaard, Søren Tison, J.-L. |
spellingShingle |
Crabeck, O. Delille, B. Thomas, D. N. Geilfus, Nicolas-Xavier Rysgaard, Søren Tison, J.-L. CO 2 and CH 4 in sea ice from a subarctic fjord under influence of riverine input |
author_facet |
Crabeck, O. Delille, B. Thomas, D. N. Geilfus, Nicolas-Xavier Rysgaard, Søren Tison, J.-L. |
author_sort |
Crabeck, O. |
title |
CO 2 and CH 4 in sea ice from a subarctic fjord under influence of riverine input |
title_short |
CO 2 and CH 4 in sea ice from a subarctic fjord under influence of riverine input |
title_full |
CO 2 and CH 4 in sea ice from a subarctic fjord under influence of riverine input |
title_fullStr |
CO 2 and CH 4 in sea ice from a subarctic fjord under influence of riverine input |
title_full_unstemmed |
CO 2 and CH 4 in sea ice from a subarctic fjord under influence of riverine input |
title_sort |
co 2 and ch 4 in sea ice from a subarctic fjord under influence of riverine input |
publishDate |
2014 |
url |
https://pure.au.dk/portal/en/publications/8fe279bb-d4ab-415b-967a-2ff80240e59c https://doi.org/10.5194/bg-11-6525-2014 https://pure.au.dk/ws/files/83506038/Crabeck_et_al_2014_.pdf |
long_lat |
ENVELOPE(-50.271,-50.271,64.435,64.435) |
geographic |
Arctic Greenland Kapisillit |
geographic_facet |
Arctic Greenland Kapisillit |
genre |
Arctic Greenland Kapisillit Sea ice Subarctic |
genre_facet |
Arctic Greenland Kapisillit Sea ice Subarctic |
op_source |
Crabeck , O , Delille , B , Thomas , D N , Geilfus , N-X , Rysgaard , S & Tison , J-L 2014 , ' CO 2 and CH 4 in sea ice from a subarctic fjord under influence of riverine input ' , Biogeosciences , vol. 11 , pp. 6525-6538 . https://doi.org/10.5194/bg-11-6525-2014 |
op_relation |
https://pure.au.dk/portal/en/publications/8fe279bb-d4ab-415b-967a-2ff80240e59c |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.5194/bg-11-6525-2014 |
container_title |
Biogeosciences |
container_volume |
11 |
container_issue |
23 |
container_start_page |
6525 |
op_container_end_page |
6538 |
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1790597165855277056 |