Diffusive and advective cross-frontal fluxes of inorganic nutrients and dissolved inorganic carbon in the Barents Sea in autumn
The Atlantic Water, entering the Arctic through the Barents Sea and Fram Strait, is the main source of nutrients in the Arctic Ocean. The Barents Sea is divided by the Polar Front into an Atlantic-dominated domain in the south, and an Arctic-dominated domain in the north. The Polar Front is a thermo...
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Online Access: | https://hdl.handle.net/11250/3106070 https://doi.org/10.1016/j.pocean.2023.103161 |
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ftimr:oai:imr.brage.unit.no:11250/3106070 2023-12-31T10:03:14+01:00 Diffusive and advective cross-frontal fluxes of inorganic nutrients and dissolved inorganic carbon in the Barents Sea in autumn Koenig, Zoe Charlotte Fer, Ilker Chierici, Melissa Fransson, Agneta Jones, Elizabeth Marie Kolås, Eivind Hugaas 2023 application/pdf https://hdl.handle.net/11250/3106070 https://doi.org/10.1016/j.pocean.2023.103161 eng eng Progress in Oceanography. 2023, 219 . urn:issn:0079-6611 https://hdl.handle.net/11250/3106070 https://doi.org/10.1016/j.pocean.2023.103161 cristin:2207497 13 219 Progress in Oceanography Peer reviewed Journal article 2023 ftimr https://doi.org/10.1016/j.pocean.2023.103161 2023-12-06T23:47:43Z The Atlantic Water, entering the Arctic through the Barents Sea and Fram Strait, is the main source of nutrients in the Arctic Ocean. The Barents Sea is divided by the Polar Front into an Atlantic-dominated domain in the south, and an Arctic-dominated domain in the north. The Polar Front is a thermohaline structure, which is topographically-steered at sub-surface, and influenced by the seasonal sea ice edge near the surface. Exchanges of nutrients between the inflowing Atlantic Water and the surrounding waters are key for the primary production in the Barents Sea. In October 2020, we measured nutrients (nitrate, phosphate and silicic acid), dissolved inorganic carbon (DIC), ocean stratification, currents and turbulence in the vicinity of the Polar Front in the Barents Sea within the framework of the Nansen Legacy project, allowing estimates of horizontal and vertical advective fluxes and turbulent fluxes of nitrate and DIC. We studied the autumn situation when primary production was declining. We found a substantial transfer of nitrate and DIC across the Polar Front from the Atlantic domain to the Arctic domain. Up to one quarter of the replenishment of the nitrate in the mixed layer during winter could be attributed to vertical mixing during wind events, shared approximately equally between advective and turbulent fluxes. The vertical turbulent fluxes bring nutrients from the subsurface Atlantic Water to the surface. We also identified an export of nitrate and DIC from the Barents Sea to the Nordic Seas occurring along the eastern shelf of Svalbard. Our study shows the role of vertical fluxes in fall and winter to precondition for the following spring bloom. publishedVersion Article in Journal/Newspaper Arctic Arctic Ocean Barents Sea Fram Strait Nordic Seas Sea ice Svalbard Institute for Marine Research: Brage IMR Progress in Oceanography 219 103161 |
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Open Polar |
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Institute for Marine Research: Brage IMR |
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ftimr |
language |
English |
description |
The Atlantic Water, entering the Arctic through the Barents Sea and Fram Strait, is the main source of nutrients in the Arctic Ocean. The Barents Sea is divided by the Polar Front into an Atlantic-dominated domain in the south, and an Arctic-dominated domain in the north. The Polar Front is a thermohaline structure, which is topographically-steered at sub-surface, and influenced by the seasonal sea ice edge near the surface. Exchanges of nutrients between the inflowing Atlantic Water and the surrounding waters are key for the primary production in the Barents Sea. In October 2020, we measured nutrients (nitrate, phosphate and silicic acid), dissolved inorganic carbon (DIC), ocean stratification, currents and turbulence in the vicinity of the Polar Front in the Barents Sea within the framework of the Nansen Legacy project, allowing estimates of horizontal and vertical advective fluxes and turbulent fluxes of nitrate and DIC. We studied the autumn situation when primary production was declining. We found a substantial transfer of nitrate and DIC across the Polar Front from the Atlantic domain to the Arctic domain. Up to one quarter of the replenishment of the nitrate in the mixed layer during winter could be attributed to vertical mixing during wind events, shared approximately equally between advective and turbulent fluxes. The vertical turbulent fluxes bring nutrients from the subsurface Atlantic Water to the surface. We also identified an export of nitrate and DIC from the Barents Sea to the Nordic Seas occurring along the eastern shelf of Svalbard. Our study shows the role of vertical fluxes in fall and winter to precondition for the following spring bloom. publishedVersion |
format |
Article in Journal/Newspaper |
author |
Koenig, Zoe Charlotte Fer, Ilker Chierici, Melissa Fransson, Agneta Jones, Elizabeth Marie Kolås, Eivind Hugaas |
spellingShingle |
Koenig, Zoe Charlotte Fer, Ilker Chierici, Melissa Fransson, Agneta Jones, Elizabeth Marie Kolås, Eivind Hugaas Diffusive and advective cross-frontal fluxes of inorganic nutrients and dissolved inorganic carbon in the Barents Sea in autumn |
author_facet |
Koenig, Zoe Charlotte Fer, Ilker Chierici, Melissa Fransson, Agneta Jones, Elizabeth Marie Kolås, Eivind Hugaas |
author_sort |
Koenig, Zoe Charlotte |
title |
Diffusive and advective cross-frontal fluxes of inorganic nutrients and dissolved inorganic carbon in the Barents Sea in autumn |
title_short |
Diffusive and advective cross-frontal fluxes of inorganic nutrients and dissolved inorganic carbon in the Barents Sea in autumn |
title_full |
Diffusive and advective cross-frontal fluxes of inorganic nutrients and dissolved inorganic carbon in the Barents Sea in autumn |
title_fullStr |
Diffusive and advective cross-frontal fluxes of inorganic nutrients and dissolved inorganic carbon in the Barents Sea in autumn |
title_full_unstemmed |
Diffusive and advective cross-frontal fluxes of inorganic nutrients and dissolved inorganic carbon in the Barents Sea in autumn |
title_sort |
diffusive and advective cross-frontal fluxes of inorganic nutrients and dissolved inorganic carbon in the barents sea in autumn |
publishDate |
2023 |
url |
https://hdl.handle.net/11250/3106070 https://doi.org/10.1016/j.pocean.2023.103161 |
genre |
Arctic Arctic Ocean Barents Sea Fram Strait Nordic Seas Sea ice Svalbard |
genre_facet |
Arctic Arctic Ocean Barents Sea Fram Strait Nordic Seas Sea ice Svalbard |
op_source |
13 219 Progress in Oceanography |
op_relation |
Progress in Oceanography. 2023, 219 . urn:issn:0079-6611 https://hdl.handle.net/11250/3106070 https://doi.org/10.1016/j.pocean.2023.103161 cristin:2207497 |
op_doi |
https://doi.org/10.1016/j.pocean.2023.103161 |
container_title |
Progress in Oceanography |
container_volume |
219 |
container_start_page |
103161 |
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1786819356316925952 |