Net Community Production and Carbon Exchange From Winter to Summer in the Atlantic Water Inflow to the Arctic Ocean
The eastern Fram Strait and area north of Svalbard, are influenced by the inflow of warm Atlantic water, which is high in nutrients and CO2, influencing the carbon flux into the Arctic Ocean. However, these estimates are mainly based on summer data and there is still doubt on the size of the net oce...
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2019
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Online Access: | https://doi.org/10.3389/fmars.2019.00528 https://doaj.org/article/19a995b397b2432495de3c33221c9d43 |
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ftdoajarticles:oai:doaj.org/article:19a995b397b2432495de3c33221c9d43 2023-05-15T14:59:09+02:00 Net Community Production and Carbon Exchange From Winter to Summer in the Atlantic Water Inflow to the Arctic Ocean Melissa Chierici Maria Vernet Agneta Fransson Knut Yngve Børsheim 2019-09-01T00:00:00Z https://doi.org/10.3389/fmars.2019.00528 https://doaj.org/article/19a995b397b2432495de3c33221c9d43 EN eng Frontiers Media S.A. https://www.frontiersin.org/article/10.3389/fmars.2019.00528/full https://doaj.org/toc/2296-7745 2296-7745 doi:10.3389/fmars.2019.00528 https://doaj.org/article/19a995b397b2432495de3c33221c9d43 Frontiers in Marine Science, Vol 6 (2019) Atlantic water sea ice melt water Fram Strait and Svalbard shelf ocean CO2 sink denitrification primary production Science Q General. Including nature conservation geographical distribution QH1-199.5 article 2019 ftdoajarticles https://doi.org/10.3389/fmars.2019.00528 2022-12-31T02:22:37Z The eastern Fram Strait and area north of Svalbard, are influenced by the inflow of warm Atlantic water, which is high in nutrients and CO2, influencing the carbon flux into the Arctic Ocean. However, these estimates are mainly based on summer data and there is still doubt on the size of the net ocean Arctic CO2 sink. We use data on carbonate chemistry and nutrients from three cruises in 2014 in the CarbonBridge project (January, May, and August) and one in Fram Strait (August). We describe the seasonal variability and the major drivers explaining the inorganic carbon change (CDIC) in the upper 50 m, such as photosynthesis (CBIO), and air-sea CO2 exchange (CEXCH). Remotely sensed data describes the evolution of the bloom and net community production. The focus area encompasses the meltwater-influenced domain (MWD) along the ice edge, the Atlantic water inflow (AWD), and the West Spitsbergen shelf (SD). The CBIO total was 2.2 mol C m–2 in the MWD derived from the nitrate consumption between January and May. Between January and August, the CBIO was 3.0 mol C m–2 in the AWD, thus CBIO between May and August was 0.8 mol C m–2. The ocean in our study area mainly acted as a CO2 sink throughout the period. The mean CO2 sink varied between 0.1 and 2.1 mol C m–2 in the AWD in August. By the end of August, the AWD acted as a CO2 source of 0.7 mol C m–2, attributed to vertical mixing of CO2-rich waters and contribution from respiratory CO2 as net community production declined. The oceanic CO2 uptake (CEXCH) from the atmosphere had an impact on CDIC between 5 and 36%, which is of similar magnitude as the impact of the calcium carbonate (CaCO3, CCALC) dissolution of 6–18%. CCALC was attributed to be caused by a combination of the sea-ice ikaite dissolution and dissolution of advected CaCO3 shells from the south. Indications of denitrification were observed, associated with sea-ice meltwater and bottom shelf processes. CBIO played a major role (48–89%) for the impact on CDIC. Article in Journal/Newspaper Arctic Arctic Ocean Fram Strait Sea ice Svalbard Spitsbergen Directory of Open Access Journals: DOAJ Articles Arctic Arctic Ocean Svalbard Frontiers in Marine Science 6 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Atlantic water sea ice melt water Fram Strait and Svalbard shelf ocean CO2 sink denitrification primary production Science Q General. Including nature conservation geographical distribution QH1-199.5 |
spellingShingle |
Atlantic water sea ice melt water Fram Strait and Svalbard shelf ocean CO2 sink denitrification primary production Science Q General. Including nature conservation geographical distribution QH1-199.5 Melissa Chierici Maria Vernet Agneta Fransson Knut Yngve Børsheim Net Community Production and Carbon Exchange From Winter to Summer in the Atlantic Water Inflow to the Arctic Ocean |
topic_facet |
Atlantic water sea ice melt water Fram Strait and Svalbard shelf ocean CO2 sink denitrification primary production Science Q General. Including nature conservation geographical distribution QH1-199.5 |
description |
The eastern Fram Strait and area north of Svalbard, are influenced by the inflow of warm Atlantic water, which is high in nutrients and CO2, influencing the carbon flux into the Arctic Ocean. However, these estimates are mainly based on summer data and there is still doubt on the size of the net ocean Arctic CO2 sink. We use data on carbonate chemistry and nutrients from three cruises in 2014 in the CarbonBridge project (January, May, and August) and one in Fram Strait (August). We describe the seasonal variability and the major drivers explaining the inorganic carbon change (CDIC) in the upper 50 m, such as photosynthesis (CBIO), and air-sea CO2 exchange (CEXCH). Remotely sensed data describes the evolution of the bloom and net community production. The focus area encompasses the meltwater-influenced domain (MWD) along the ice edge, the Atlantic water inflow (AWD), and the West Spitsbergen shelf (SD). The CBIO total was 2.2 mol C m–2 in the MWD derived from the nitrate consumption between January and May. Between January and August, the CBIO was 3.0 mol C m–2 in the AWD, thus CBIO between May and August was 0.8 mol C m–2. The ocean in our study area mainly acted as a CO2 sink throughout the period. The mean CO2 sink varied between 0.1 and 2.1 mol C m–2 in the AWD in August. By the end of August, the AWD acted as a CO2 source of 0.7 mol C m–2, attributed to vertical mixing of CO2-rich waters and contribution from respiratory CO2 as net community production declined. The oceanic CO2 uptake (CEXCH) from the atmosphere had an impact on CDIC between 5 and 36%, which is of similar magnitude as the impact of the calcium carbonate (CaCO3, CCALC) dissolution of 6–18%. CCALC was attributed to be caused by a combination of the sea-ice ikaite dissolution and dissolution of advected CaCO3 shells from the south. Indications of denitrification were observed, associated with sea-ice meltwater and bottom shelf processes. CBIO played a major role (48–89%) for the impact on CDIC. |
format |
Article in Journal/Newspaper |
author |
Melissa Chierici Maria Vernet Agneta Fransson Knut Yngve Børsheim |
author_facet |
Melissa Chierici Maria Vernet Agneta Fransson Knut Yngve Børsheim |
author_sort |
Melissa Chierici |
title |
Net Community Production and Carbon Exchange From Winter to Summer in the Atlantic Water Inflow to the Arctic Ocean |
title_short |
Net Community Production and Carbon Exchange From Winter to Summer in the Atlantic Water Inflow to the Arctic Ocean |
title_full |
Net Community Production and Carbon Exchange From Winter to Summer in the Atlantic Water Inflow to the Arctic Ocean |
title_fullStr |
Net Community Production and Carbon Exchange From Winter to Summer in the Atlantic Water Inflow to the Arctic Ocean |
title_full_unstemmed |
Net Community Production and Carbon Exchange From Winter to Summer in the Atlantic Water Inflow to the Arctic Ocean |
title_sort |
net community production and carbon exchange from winter to summer in the atlantic water inflow to the arctic ocean |
publisher |
Frontiers Media S.A. |
publishDate |
2019 |
url |
https://doi.org/10.3389/fmars.2019.00528 https://doaj.org/article/19a995b397b2432495de3c33221c9d43 |
geographic |
Arctic Arctic Ocean Svalbard |
geographic_facet |
Arctic Arctic Ocean Svalbard |
genre |
Arctic Arctic Ocean Fram Strait Sea ice Svalbard Spitsbergen |
genre_facet |
Arctic Arctic Ocean Fram Strait Sea ice Svalbard Spitsbergen |
op_source |
Frontiers in Marine Science, Vol 6 (2019) |
op_relation |
https://www.frontiersin.org/article/10.3389/fmars.2019.00528/full https://doaj.org/toc/2296-7745 2296-7745 doi:10.3389/fmars.2019.00528 https://doaj.org/article/19a995b397b2432495de3c33221c9d43 |
op_doi |
https://doi.org/10.3389/fmars.2019.00528 |
container_title |
Frontiers in Marine Science |
container_volume |
6 |
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1766331290664042496 |