Export of nutrients from the Arctic Ocean
This study provides the first physically based mass-balanced transport estimates of dissolved inorganic nutrients (nitrate, phosphate, and silicate) for the Arctic Ocean. Using an inverse model-generated velocity field in combination with a quasi-synoptic assemblage of hydrographic and hydrochemical...
Published in: | Journal of Geophysical Research: Oceans |
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2013
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Online Access: | http://nora.nerc.ac.uk/id/eprint/501870/ https://nora.nerc.ac.uk/id/eprint/501870/1/jgrc20063_TorresValdes.pdf https://doi.org/10.1002/jgrc.20063 |
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ftnerc:oai:nora.nerc.ac.uk:501870 2023-05-15T14:27:09+02:00 Export of nutrients from the Arctic Ocean Torres-valdes, Sinhué Tsubouchi, Takamasa Bacon, Sheldon Naveira-Garabato, Alberto C. Sanders, Richard McLaughlin, Fiona A. Petrie, Brian Kattner, Gerhard Azetsu-Scott, Kumiko Whitledge, Terry E. 2013-04 text http://nora.nerc.ac.uk/id/eprint/501870/ https://nora.nerc.ac.uk/id/eprint/501870/1/jgrc20063_TorresValdes.pdf https://doi.org/10.1002/jgrc.20063 en eng https://nora.nerc.ac.uk/id/eprint/501870/1/jgrc20063_TorresValdes.pdf Torres-valdes, Sinhué; Tsubouchi, Takamasa; Bacon, Sheldon orcid:0000-0002-2471-9373 Naveira-Garabato, Alberto C.; Sanders, Richard orcid:0000-0002-6884-7131 McLaughlin, Fiona A.; Petrie, Brian; Kattner, Gerhard; Azetsu-Scott, Kumiko; Whitledge, Terry E. 2013 Export of nutrients from the Arctic Ocean. Journal of Geophysical Research: Oceans, 118 (4). 1625-1644. https://doi.org/10.1002/jgrc.20063 <https://doi.org/10.1002/jgrc.20063> Publication - Article PeerReviewed 2013 ftnerc https://doi.org/10.1002/jgrc.20063 2023-02-04T19:36:56Z This study provides the first physically based mass-balanced transport estimates of dissolved inorganic nutrients (nitrate, phosphate, and silicate) for the Arctic Ocean. Using an inverse model-generated velocity field in combination with a quasi-synoptic assemblage of hydrographic and hydrochemical data, we quantify nutrient transports across the main Arctic Ocean gateways: Davis Strait, Fram Strait, the Barents Sea Opening (BSO), and Bering Strait. We found that the major exports of all three nutrients occur via Davis Strait. Transports associated with the East Greenland Current are almost balanced by transports associated with the West Spitsbergen Current. The most important imports of nitrate and phosphate to the Arctic occur via the BSO, and the most important import of silicate occurs via Bering Strait. Oceanic budgets show that statistically robust net silicate and phosphate exports exist, while the net nitrate flux is zero, within the uncertainty limits. The Arctic Ocean is a net exporter of silicate (−15.7 ± 3.2 kmol s−1) and phosphate (−1.0 ± 0.3 kmol s−1; net ± 1 standard error) to the North Atlantic. The export of excess phosphate (relative to nitrate) from the Arctic, calculated at −1.1 ± 0.3 kmol s−1, is almost twice as large as previously estimated. Net transports of silicate and phosphate from the Arctic Ocean provide 12% and 90%, respectively, of the net southward fluxes estimated at 47°N in the North Atlantic. Additional sources of nutrients that may offset nutrient imbalances are explored, and the relevance and the pathway of nutrient transports to the North Atlantic are discussed. Article in Journal/Newspaper Arctic Arctic Arctic Ocean Barents Sea Bering Strait Davis Strait East Greenland east greenland current Fram Strait Greenland North Atlantic Spitsbergen Natural Environment Research Council: NERC Open Research Archive Arctic Arctic Ocean Barents Sea Bering Strait Greenland Journal of Geophysical Research: Oceans 118 4 1625 1644 |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
English |
description |
This study provides the first physically based mass-balanced transport estimates of dissolved inorganic nutrients (nitrate, phosphate, and silicate) for the Arctic Ocean. Using an inverse model-generated velocity field in combination with a quasi-synoptic assemblage of hydrographic and hydrochemical data, we quantify nutrient transports across the main Arctic Ocean gateways: Davis Strait, Fram Strait, the Barents Sea Opening (BSO), and Bering Strait. We found that the major exports of all three nutrients occur via Davis Strait. Transports associated with the East Greenland Current are almost balanced by transports associated with the West Spitsbergen Current. The most important imports of nitrate and phosphate to the Arctic occur via the BSO, and the most important import of silicate occurs via Bering Strait. Oceanic budgets show that statistically robust net silicate and phosphate exports exist, while the net nitrate flux is zero, within the uncertainty limits. The Arctic Ocean is a net exporter of silicate (−15.7 ± 3.2 kmol s−1) and phosphate (−1.0 ± 0.3 kmol s−1; net ± 1 standard error) to the North Atlantic. The export of excess phosphate (relative to nitrate) from the Arctic, calculated at −1.1 ± 0.3 kmol s−1, is almost twice as large as previously estimated. Net transports of silicate and phosphate from the Arctic Ocean provide 12% and 90%, respectively, of the net southward fluxes estimated at 47°N in the North Atlantic. Additional sources of nutrients that may offset nutrient imbalances are explored, and the relevance and the pathway of nutrient transports to the North Atlantic are discussed. |
format |
Article in Journal/Newspaper |
author |
Torres-valdes, Sinhué Tsubouchi, Takamasa Bacon, Sheldon Naveira-Garabato, Alberto C. Sanders, Richard McLaughlin, Fiona A. Petrie, Brian Kattner, Gerhard Azetsu-Scott, Kumiko Whitledge, Terry E. |
spellingShingle |
Torres-valdes, Sinhué Tsubouchi, Takamasa Bacon, Sheldon Naveira-Garabato, Alberto C. Sanders, Richard McLaughlin, Fiona A. Petrie, Brian Kattner, Gerhard Azetsu-Scott, Kumiko Whitledge, Terry E. Export of nutrients from the Arctic Ocean |
author_facet |
Torres-valdes, Sinhué Tsubouchi, Takamasa Bacon, Sheldon Naveira-Garabato, Alberto C. Sanders, Richard McLaughlin, Fiona A. Petrie, Brian Kattner, Gerhard Azetsu-Scott, Kumiko Whitledge, Terry E. |
author_sort |
Torres-valdes, Sinhué |
title |
Export of nutrients from the Arctic Ocean |
title_short |
Export of nutrients from the Arctic Ocean |
title_full |
Export of nutrients from the Arctic Ocean |
title_fullStr |
Export of nutrients from the Arctic Ocean |
title_full_unstemmed |
Export of nutrients from the Arctic Ocean |
title_sort |
export of nutrients from the arctic ocean |
publishDate |
2013 |
url |
http://nora.nerc.ac.uk/id/eprint/501870/ https://nora.nerc.ac.uk/id/eprint/501870/1/jgrc20063_TorresValdes.pdf https://doi.org/10.1002/jgrc.20063 |
geographic |
Arctic Arctic Ocean Barents Sea Bering Strait Greenland |
geographic_facet |
Arctic Arctic Ocean Barents Sea Bering Strait Greenland |
genre |
Arctic Arctic Arctic Ocean Barents Sea Bering Strait Davis Strait East Greenland east greenland current Fram Strait Greenland North Atlantic Spitsbergen |
genre_facet |
Arctic Arctic Arctic Ocean Barents Sea Bering Strait Davis Strait East Greenland east greenland current Fram Strait Greenland North Atlantic Spitsbergen |
op_relation |
https://nora.nerc.ac.uk/id/eprint/501870/1/jgrc20063_TorresValdes.pdf Torres-valdes, Sinhué; Tsubouchi, Takamasa; Bacon, Sheldon orcid:0000-0002-2471-9373 Naveira-Garabato, Alberto C.; Sanders, Richard orcid:0000-0002-6884-7131 McLaughlin, Fiona A.; Petrie, Brian; Kattner, Gerhard; Azetsu-Scott, Kumiko; Whitledge, Terry E. 2013 Export of nutrients from the Arctic Ocean. Journal of Geophysical Research: Oceans, 118 (4). 1625-1644. https://doi.org/10.1002/jgrc.20063 <https://doi.org/10.1002/jgrc.20063> |
op_doi |
https://doi.org/10.1002/jgrc.20063 |
container_title |
Journal of Geophysical Research: Oceans |
container_volume |
118 |
container_issue |
4 |
container_start_page |
1625 |
op_container_end_page |
1644 |
_version_ |
1766300744989802496 |