Influence of glacial water and carbonate minerals on wintertime sea-ice biogeochemistry and the CO2 system in an Arctic fjord in Svalbard
The effect of freshwater sources on wintertime sea-ice CO2 processes was studied from the glacier front to the outer Tempelfjorden, Svalbard, in sea ice, glacier ice, brine and snow. March–April 2012 was mild, and the fjord was mainly covered with drift ice, in contrast to the observed thicker fast...
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Online Access: | https://hdl.handle.net/11250/2689523 https://doi.org/10.1017/aog.2020.52 |
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ftimr:oai:imr.brage.unit.no:11250/2689523 2023-05-15T13:29:06+02:00 Influence of glacial water and carbonate minerals on wintertime sea-ice biogeochemistry and the CO2 system in an Arctic fjord in Svalbard Fransson, Agneta Chierici, Melissa Nomura, Daiki Granskog, Mats Kristiansen, Svein Martma, Tõnu Nehrke, Gernot 2020 application/pdf https://hdl.handle.net/11250/2689523 https://doi.org/10.1017/aog.2020.52 eng eng Annals of Glaciology. 2020, 1-21. urn:issn:0260-3055 https://hdl.handle.net/11250/2689523 https://doi.org/10.1017/aog.2020.52 cristin:1849262 1-21 Annals of Glaciology Peer reviewed Journal article 2020 ftimr https://doi.org/10.1017/aog.2020.52 2021-09-23T20:14:41Z The effect of freshwater sources on wintertime sea-ice CO2 processes was studied from the glacier front to the outer Tempelfjorden, Svalbard, in sea ice, glacier ice, brine and snow. March–April 2012 was mild, and the fjord was mainly covered with drift ice, in contrast to the observed thicker fast ice in the colder April 2013. This resulted in different physical and chemical properties of the sea ice and under-ice water. Data from stable oxygen isotopic ratios and salinity showed that the sea ice at the glacier front in April 2012 contained on average 54% of frozen-in glacial meltwater. This was five times higher than in April 2013, where the ice was frozen seawater. In April 2012, the largest excess of sea-ice total alkalinity (AT), carbonate ion ([CO32−]) and bicarbonate ion concentrations ([HCO3−]) relative to salinity was mainly related to dissolved dolomite and calcite incorporated during freezing of mineral-enriched glacial water. In April 2013, the excess of these variables was mainly due to ikaite dissolution as a result of sea-ice processes. Dolomite dissolution increased sea-ice AT twice as much as ikaite and calcite dissolution, implying different buffering capacity and potential for ocean CO2 uptake in a changing climate. publishedVersion Article in Journal/Newspaper Annals of Glaciology Arctic glacier Sea ice Svalbard Tempelfjord* Tempelfjorden Institute for Marine Research: Brage IMR Arctic Svalbard Tempelfjorden ENVELOPE(17.076,17.076,78.404,78.404) Annals of Glaciology 61 83 320 340 |
institution |
Open Polar |
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Institute for Marine Research: Brage IMR |
op_collection_id |
ftimr |
language |
English |
description |
The effect of freshwater sources on wintertime sea-ice CO2 processes was studied from the glacier front to the outer Tempelfjorden, Svalbard, in sea ice, glacier ice, brine and snow. March–April 2012 was mild, and the fjord was mainly covered with drift ice, in contrast to the observed thicker fast ice in the colder April 2013. This resulted in different physical and chemical properties of the sea ice and under-ice water. Data from stable oxygen isotopic ratios and salinity showed that the sea ice at the glacier front in April 2012 contained on average 54% of frozen-in glacial meltwater. This was five times higher than in April 2013, where the ice was frozen seawater. In April 2012, the largest excess of sea-ice total alkalinity (AT), carbonate ion ([CO32−]) and bicarbonate ion concentrations ([HCO3−]) relative to salinity was mainly related to dissolved dolomite and calcite incorporated during freezing of mineral-enriched glacial water. In April 2013, the excess of these variables was mainly due to ikaite dissolution as a result of sea-ice processes. Dolomite dissolution increased sea-ice AT twice as much as ikaite and calcite dissolution, implying different buffering capacity and potential for ocean CO2 uptake in a changing climate. publishedVersion |
format |
Article in Journal/Newspaper |
author |
Fransson, Agneta Chierici, Melissa Nomura, Daiki Granskog, Mats Kristiansen, Svein Martma, Tõnu Nehrke, Gernot |
spellingShingle |
Fransson, Agneta Chierici, Melissa Nomura, Daiki Granskog, Mats Kristiansen, Svein Martma, Tõnu Nehrke, Gernot Influence of glacial water and carbonate minerals on wintertime sea-ice biogeochemistry and the CO2 system in an Arctic fjord in Svalbard |
author_facet |
Fransson, Agneta Chierici, Melissa Nomura, Daiki Granskog, Mats Kristiansen, Svein Martma, Tõnu Nehrke, Gernot |
author_sort |
Fransson, Agneta |
title |
Influence of glacial water and carbonate minerals on wintertime sea-ice biogeochemistry and the CO2 system in an Arctic fjord in Svalbard |
title_short |
Influence of glacial water and carbonate minerals on wintertime sea-ice biogeochemistry and the CO2 system in an Arctic fjord in Svalbard |
title_full |
Influence of glacial water and carbonate minerals on wintertime sea-ice biogeochemistry and the CO2 system in an Arctic fjord in Svalbard |
title_fullStr |
Influence of glacial water and carbonate minerals on wintertime sea-ice biogeochemistry and the CO2 system in an Arctic fjord in Svalbard |
title_full_unstemmed |
Influence of glacial water and carbonate minerals on wintertime sea-ice biogeochemistry and the CO2 system in an Arctic fjord in Svalbard |
title_sort |
influence of glacial water and carbonate minerals on wintertime sea-ice biogeochemistry and the co2 system in an arctic fjord in svalbard |
publishDate |
2020 |
url |
https://hdl.handle.net/11250/2689523 https://doi.org/10.1017/aog.2020.52 |
long_lat |
ENVELOPE(17.076,17.076,78.404,78.404) |
geographic |
Arctic Svalbard Tempelfjorden |
geographic_facet |
Arctic Svalbard Tempelfjorden |
genre |
Annals of Glaciology Arctic glacier Sea ice Svalbard Tempelfjord* Tempelfjorden |
genre_facet |
Annals of Glaciology Arctic glacier Sea ice Svalbard Tempelfjord* Tempelfjorden |
op_source |
1-21 Annals of Glaciology |
op_relation |
Annals of Glaciology. 2020, 1-21. urn:issn:0260-3055 https://hdl.handle.net/11250/2689523 https://doi.org/10.1017/aog.2020.52 cristin:1849262 |
op_doi |
https://doi.org/10.1017/aog.2020.52 |
container_title |
Annals of Glaciology |
container_volume |
61 |
container_issue |
83 |
container_start_page |
320 |
op_container_end_page |
340 |
_version_ |
1765998477879279616 |