Effect of glacial drainage water on the CO2 system and ocean acidification state in an Arctic tidewater-glacier fjord during two contrasting years
In order to investigate the effect of glacial water on the CO2 system in the fjord, we studied the variability of the total alkalinity (AT), total dissolved inorganic carbon (CT), dissolved inorganic nutrients, oxygen isotopic ratio (δ18O), and freshwater fractions from the glacier front to the oute...
Published in: | Journal of Geophysical Research: Oceans |
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Online Access: | https://hdl.handle.net/11250/2994899 https://doi.org/10.1002/2014JC010320 |
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ftimr:oai:imr.brage.unit.no:11250/2994899 2023-05-15T15:09:34+02:00 Effect of glacial drainage water on the CO2 system and ocean acidification state in an Arctic tidewater-glacier fjord during two contrasting years Fransson, Agneta Ingrid Chierici, Melissa Nomura, Daiki Granskog, Mats A. Kristiansen, Svein Martma, Tõnu Nehrke, Gernot 2015 application/pdf https://hdl.handle.net/11250/2994899 https://doi.org/10.1002/2014JC010320 eng eng Journal of Geophysical Research (JGR): Oceans. 2015, 120 (4), 2413-2429. urn:issn:2169-9275 https://hdl.handle.net/11250/2994899 https://doi.org/10.1002/2014JC010320 cristin:1250146 2413-2429 120 Journal of Geophysical Research (JGR): Oceans 4 Peer reviewed Journal article 2015 ftimr https://doi.org/10.1002/2014JC010320 2022-05-11T22:40:30Z In order to investigate the effect of glacial water on the CO2 system in the fjord, we studied the variability of the total alkalinity (AT), total dissolved inorganic carbon (CT), dissolved inorganic nutrients, oxygen isotopic ratio (δ18O), and freshwater fractions from the glacier front to the outer Tempelfjorden on Spitsbergen in winter 2012 (January, March, and April) and 2013 (April) and summer/fall 2013 (September). The two contrasting years clearly showed that the influence of freshwater, mixing, and haline convection affected the chemical and physical characteristics of the fjord. The seasonal variability showed the lowest calcium carbonate saturation state (Ω) and pH values in March 2012 coinciding with the highest freshwater fractions. The highest Ω and pH were found in September 2013, mostly due to CO2 uptake during primary production. Overall, we found that increased freshwater supply decreased Ω, pH, and AT. On the other hand, we observed higher AT relative to salinity in the freshwater end-member in the mild and rainy winter of 2012 (1142 μmol kg−1) compared to AT in 2013 (526 μmol kg−1). Observations of calcite and dolomite crystals in the glacial ice suggested supply of carbonate-rich glacial drainage water to the fjord. This implies that winters with a large amount of glacial drainage water partly provide a lessening of further ocean acidification, which will also affect the air-sea CO2 exchange. publishedVersion Article in Journal/Newspaper Arctic Ocean acidification Tempelfjord* Tempelfjorden Tidewater Spitsbergen Institute for Marine Research: Brage IMR Arctic Tempelfjorden ENVELOPE(17.076,17.076,78.404,78.404) Journal of Geophysical Research: Oceans 120 4 2413 2429 |
institution |
Open Polar |
collection |
Institute for Marine Research: Brage IMR |
op_collection_id |
ftimr |
language |
English |
description |
In order to investigate the effect of glacial water on the CO2 system in the fjord, we studied the variability of the total alkalinity (AT), total dissolved inorganic carbon (CT), dissolved inorganic nutrients, oxygen isotopic ratio (δ18O), and freshwater fractions from the glacier front to the outer Tempelfjorden on Spitsbergen in winter 2012 (January, March, and April) and 2013 (April) and summer/fall 2013 (September). The two contrasting years clearly showed that the influence of freshwater, mixing, and haline convection affected the chemical and physical characteristics of the fjord. The seasonal variability showed the lowest calcium carbonate saturation state (Ω) and pH values in March 2012 coinciding with the highest freshwater fractions. The highest Ω and pH were found in September 2013, mostly due to CO2 uptake during primary production. Overall, we found that increased freshwater supply decreased Ω, pH, and AT. On the other hand, we observed higher AT relative to salinity in the freshwater end-member in the mild and rainy winter of 2012 (1142 μmol kg−1) compared to AT in 2013 (526 μmol kg−1). Observations of calcite and dolomite crystals in the glacial ice suggested supply of carbonate-rich glacial drainage water to the fjord. This implies that winters with a large amount of glacial drainage water partly provide a lessening of further ocean acidification, which will also affect the air-sea CO2 exchange. publishedVersion |
format |
Article in Journal/Newspaper |
author |
Fransson, Agneta Ingrid Chierici, Melissa Nomura, Daiki Granskog, Mats A. Kristiansen, Svein Martma, Tõnu Nehrke, Gernot |
spellingShingle |
Fransson, Agneta Ingrid Chierici, Melissa Nomura, Daiki Granskog, Mats A. Kristiansen, Svein Martma, Tõnu Nehrke, Gernot Effect of glacial drainage water on the CO2 system and ocean acidification state in an Arctic tidewater-glacier fjord during two contrasting years |
author_facet |
Fransson, Agneta Ingrid Chierici, Melissa Nomura, Daiki Granskog, Mats A. Kristiansen, Svein Martma, Tõnu Nehrke, Gernot |
author_sort |
Fransson, Agneta Ingrid |
title |
Effect of glacial drainage water on the CO2 system and ocean acidification state in an Arctic tidewater-glacier fjord during two contrasting years |
title_short |
Effect of glacial drainage water on the CO2 system and ocean acidification state in an Arctic tidewater-glacier fjord during two contrasting years |
title_full |
Effect of glacial drainage water on the CO2 system and ocean acidification state in an Arctic tidewater-glacier fjord during two contrasting years |
title_fullStr |
Effect of glacial drainage water on the CO2 system and ocean acidification state in an Arctic tidewater-glacier fjord during two contrasting years |
title_full_unstemmed |
Effect of glacial drainage water on the CO2 system and ocean acidification state in an Arctic tidewater-glacier fjord during two contrasting years |
title_sort |
effect of glacial drainage water on the co2 system and ocean acidification state in an arctic tidewater-glacier fjord during two contrasting years |
publishDate |
2015 |
url |
https://hdl.handle.net/11250/2994899 https://doi.org/10.1002/2014JC010320 |
long_lat |
ENVELOPE(17.076,17.076,78.404,78.404) |
geographic |
Arctic Tempelfjorden |
geographic_facet |
Arctic Tempelfjorden |
genre |
Arctic Ocean acidification Tempelfjord* Tempelfjorden Tidewater Spitsbergen |
genre_facet |
Arctic Ocean acidification Tempelfjord* Tempelfjorden Tidewater Spitsbergen |
op_source |
2413-2429 120 Journal of Geophysical Research (JGR): Oceans 4 |
op_relation |
Journal of Geophysical Research (JGR): Oceans. 2015, 120 (4), 2413-2429. urn:issn:2169-9275 https://hdl.handle.net/11250/2994899 https://doi.org/10.1002/2014JC010320 cristin:1250146 |
op_doi |
https://doi.org/10.1002/2014JC010320 |
container_title |
Journal of Geophysical Research: Oceans |
container_volume |
120 |
container_issue |
4 |
container_start_page |
2413 |
op_container_end_page |
2429 |
_version_ |
1766340737692073984 |