CO2 and CH4 in sea ice from a subarctic fjord under influence of riverine input
We present the CH4 concentration [CH4], the partial pressure of CO2 (pCO2) and the total gas content in bulk sea ice from subarctic, land-fast sea ice in the Kapisillit fjord, Greenland. Fjord systems are characterized by freshwater runoff and riverine input and based on dδ18O data, we show that >...
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ftunivbruxelles:oai:dipot.ulb.ac.be:2013/186046 2023-05-15T16:29:28+02:00 CO2 and CH4 in sea ice from a subarctic fjord under influence of riverine input Crabeck, O. Delille, Bruno Thomas, D. R. Geilfus, Nicolas Xavier Rysgaard, Søren Tison, Jean-Louis 2014-12-01 1 full-text file(s): application/pdf http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/186046 https://dipot.ulb.ac.be/dspace/bitstream/2013/186046/3/doi_169673.pdf en eng uri/info:doi/10.5194/bg-11-6525-2014 uri/info:scp/84914142105 https://dipot.ulb.ac.be/dspace/bitstream/2013/186046/3/doi_169673.pdf http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/186046 1 full-text file(s): info:eu-repo/semantics/openAccess Biogeosciences, 11 Sciences exactes et naturelles info:eu-repo/semantics/article info:ulb-repo/semantics/articlePeerReview info:ulb-repo/semantics/openurl/article 2014 ftunivbruxelles 2022-06-12T21:04:37Z We present the CH4 concentration [CH4], the partial pressure of CO2 (pCO2) and the total gas content in bulk sea ice from subarctic, land-fast sea ice in the Kapisillit fjord, Greenland. Fjord systems are characterized by freshwater runoff and riverine input and based on dδ18O data, we show that > 30% of the surface water originated from periodic river input during ice growth. This resulted in fresher sea-ice layers with higher gas content than is typical from marine sea ice. The bulk ice [CH4] ranged from 1.8 to 12.1 nmol Lg-1, which corresponds to a partial pressure ranging from 3 to 28 ppmv. This is markedly higher than the average atmospheric methane content of 1.9 ppmv. Evidently most of the trapped methane within the ice was contained inside bubbles, and only a minor portion was dissolved in the brines. The bulk ice pCO2 ranged from 60 to 330 ppmv indicating that sea ice at temperatures above -4 °C is undersaturated compared to the atmosphere (390 ppmv). This study adds to the few existing studies of CH4 and CO2 in sea ice, and we conclude that subarctic seawater can be a sink for atmospheric CO2, while being a net source of CH4. SCOPUS: ar.j info:eu-repo/semantics/published Article in Journal/Newspaper Greenland Kapisillit Sea ice Subarctic DI-fusion : dépôt institutionnel de l'Université libre de Bruxelles (ULB) Greenland Kapisillit ENVELOPE(-50.271,-50.271,64.435,64.435) |
institution |
Open Polar |
collection |
DI-fusion : dépôt institutionnel de l'Université libre de Bruxelles (ULB) |
op_collection_id |
ftunivbruxelles |
language |
English |
topic |
Sciences exactes et naturelles |
spellingShingle |
Sciences exactes et naturelles Crabeck, O. Delille, Bruno Thomas, D. R. Geilfus, Nicolas Xavier Rysgaard, Søren Tison, Jean-Louis CO2 and CH4 in sea ice from a subarctic fjord under influence of riverine input |
topic_facet |
Sciences exactes et naturelles |
description |
We present the CH4 concentration [CH4], the partial pressure of CO2 (pCO2) and the total gas content in bulk sea ice from subarctic, land-fast sea ice in the Kapisillit fjord, Greenland. Fjord systems are characterized by freshwater runoff and riverine input and based on dδ18O data, we show that > 30% of the surface water originated from periodic river input during ice growth. This resulted in fresher sea-ice layers with higher gas content than is typical from marine sea ice. The bulk ice [CH4] ranged from 1.8 to 12.1 nmol Lg-1, which corresponds to a partial pressure ranging from 3 to 28 ppmv. This is markedly higher than the average atmospheric methane content of 1.9 ppmv. Evidently most of the trapped methane within the ice was contained inside bubbles, and only a minor portion was dissolved in the brines. The bulk ice pCO2 ranged from 60 to 330 ppmv indicating that sea ice at temperatures above -4 °C is undersaturated compared to the atmosphere (390 ppmv). This study adds to the few existing studies of CH4 and CO2 in sea ice, and we conclude that subarctic seawater can be a sink for atmospheric CO2, while being a net source of CH4. SCOPUS: ar.j info:eu-repo/semantics/published |
format |
Article in Journal/Newspaper |
author |
Crabeck, O. Delille, Bruno Thomas, D. R. Geilfus, Nicolas Xavier Rysgaard, Søren Tison, Jean-Louis |
author_facet |
Crabeck, O. Delille, Bruno Thomas, D. R. Geilfus, Nicolas Xavier Rysgaard, Søren Tison, Jean-Louis |
author_sort |
Crabeck, O. |
title |
CO2 and CH4 in sea ice from a subarctic fjord under influence of riverine input |
title_short |
CO2 and CH4 in sea ice from a subarctic fjord under influence of riverine input |
title_full |
CO2 and CH4 in sea ice from a subarctic fjord under influence of riverine input |
title_fullStr |
CO2 and CH4 in sea ice from a subarctic fjord under influence of riverine input |
title_full_unstemmed |
CO2 and CH4 in sea ice from a subarctic fjord under influence of riverine input |
title_sort |
co2 and ch4 in sea ice from a subarctic fjord under influence of riverine input |
publishDate |
2014 |
url |
http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/186046 https://dipot.ulb.ac.be/dspace/bitstream/2013/186046/3/doi_169673.pdf |
long_lat |
ENVELOPE(-50.271,-50.271,64.435,64.435) |
geographic |
Greenland Kapisillit |
geographic_facet |
Greenland Kapisillit |
genre |
Greenland Kapisillit Sea ice Subarctic |
genre_facet |
Greenland Kapisillit Sea ice Subarctic |
op_source |
Biogeosciences, 11 |
op_relation |
uri/info:doi/10.5194/bg-11-6525-2014 uri/info:scp/84914142105 https://dipot.ulb.ac.be/dspace/bitstream/2013/186046/3/doi_169673.pdf http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/186046 |
op_rights |
1 full-text file(s): info:eu-repo/semantics/openAccess |
_version_ |
1766019160746229760 |