A Refinement of the Processes Controlling Dissolved Copper and Nickel Biogeochemistry: Insights From the Pan‐Arctic
Recent studies, including many from the GEOTRACES program, have expanded our knowledge of trace metals in the Arctic Ocean, an isolated ocean dominated by continental shelf and riverine inputs. Here, we report a unique, pan-Arctic linear relationship between dissolved copper (Cu) and nickel (Ni) pre...
Published in: | Journal of Geophysical Research: Oceans |
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Format: | Article in Journal/Newspaper |
Language: | English |
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AGU (American Geophysical Union)
2022
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Online Access: | https://oceanrep.geomar.de/id/eprint/56085/ https://oceanrep.geomar.de/id/eprint/56085/1/Jensen%20et%20al.pdf https://oceanrep.geomar.de/id/eprint/56085/7/2021jc018087-sup-0001-supporting https://doi.org/10.1029/2021JC018087 |
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ftoceanrep:oai:oceanrep.geomar.de:56085 2024-02-11T09:59:41+01:00 A Refinement of the Processes Controlling Dissolved Copper and Nickel Biogeochemistry: Insights From the Pan‐Arctic Jensen, Laramie T. Cullen, Jay T. Jackson, Sarah L. Gerringa, Loes J. A. Bauch, Dorothea Middag, Rob Sherrell, Robert M. Fitzsimmons, Jessica N. 2022-05-26 text other https://oceanrep.geomar.de/id/eprint/56085/ https://oceanrep.geomar.de/id/eprint/56085/1/Jensen%20et%20al.pdf https://oceanrep.geomar.de/id/eprint/56085/7/2021jc018087-sup-0001-supporting https://doi.org/10.1029/2021JC018087 en eng AGU (American Geophysical Union) Wiley https://oceanrep.geomar.de/id/eprint/56085/1/Jensen%20et%20al.pdf https://oceanrep.geomar.de/id/eprint/56085/7/2021jc018087-sup-0001-supporting Jensen, L. T., Cullen, J. T., Jackson, S. L., Gerringa, L. J. A., Bauch, D. , Middag, R., Sherrell, R. M. and Fitzsimmons, J. N. (2022) A Refinement of the Processes Controlling Dissolved Copper and Nickel Biogeochemistry: Insights From the Pan‐Arctic. Open Access Journal of Geophysical Research: Oceans, 127 (5). Art.Nr. e2021JC018087. DOI 10.1029/2021JC018087 <https://doi.org/10.1029/2021JC018087>. doi:10.1029/2021JC018087 info:eu-repo/semantics/openAccess Article PeerReviewed info:eu-repo/semantics/article 2022 ftoceanrep https://doi.org/10.1029/2021JC018087 2024-01-15T00:25:24Z Recent studies, including many from the GEOTRACES program, have expanded our knowledge of trace metals in the Arctic Ocean, an isolated ocean dominated by continental shelf and riverine inputs. Here, we report a unique, pan-Arctic linear relationship between dissolved copper (Cu) and nickel (Ni) present north of 60°N that is absent in other oceans. The correlation is driven primarily by high Cu and Ni concentrations in the low salinity, river-influenced surface Arctic and low, homogeneous concentrations in Arctic deep waters, opposing their typical global distributions. Rivers are a major source of both metals, which is most evident within the central Arctic's Transpolar Drift. Local decoupling of the linear Cu-Ni relationship along the Chukchi Shelf and within the Canada Basin upper halocline reveals that Ni is additionally modified by biological cycling and shelf sediment processes, while Cu is mostly sourced from riverine inputs and influenced by mixing. This observation highlights differences in their chemistries: Cu is more prone to complexation with organic ligands, stabilizing its riverine source fluxes into the Arctic, while Ni is more labile and is dominated by biological processes. Within the Canadian Arctic Archipelago, an important source of Arctic water to the Atlantic Ocean, contributions of Cu and Ni from meteoric waters and the halocline are attenuated during transit to the Atlantic. Additionally, Cu and Ni in deep waters diminish with age due to isolation from surface sources, with higher concentrations in the younger Eastern Arctic basins and lower concentrations in the older Western Arctic basins. Article in Journal/Newspaper Arctic Arctic Archipelago Arctic Arctic Ocean canada basin Canadian Arctic Archipelago Chukchi OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Arctic Arctic Ocean Canada Canadian Arctic Archipelago Chukchi Shelf ENVELOPE(-169.167,-169.167,70.550,70.550) Journal of Geophysical Research: Oceans 127 5 |
institution |
Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
op_collection_id |
ftoceanrep |
language |
English |
description |
Recent studies, including many from the GEOTRACES program, have expanded our knowledge of trace metals in the Arctic Ocean, an isolated ocean dominated by continental shelf and riverine inputs. Here, we report a unique, pan-Arctic linear relationship between dissolved copper (Cu) and nickel (Ni) present north of 60°N that is absent in other oceans. The correlation is driven primarily by high Cu and Ni concentrations in the low salinity, river-influenced surface Arctic and low, homogeneous concentrations in Arctic deep waters, opposing their typical global distributions. Rivers are a major source of both metals, which is most evident within the central Arctic's Transpolar Drift. Local decoupling of the linear Cu-Ni relationship along the Chukchi Shelf and within the Canada Basin upper halocline reveals that Ni is additionally modified by biological cycling and shelf sediment processes, while Cu is mostly sourced from riverine inputs and influenced by mixing. This observation highlights differences in their chemistries: Cu is more prone to complexation with organic ligands, stabilizing its riverine source fluxes into the Arctic, while Ni is more labile and is dominated by biological processes. Within the Canadian Arctic Archipelago, an important source of Arctic water to the Atlantic Ocean, contributions of Cu and Ni from meteoric waters and the halocline are attenuated during transit to the Atlantic. Additionally, Cu and Ni in deep waters diminish with age due to isolation from surface sources, with higher concentrations in the younger Eastern Arctic basins and lower concentrations in the older Western Arctic basins. |
format |
Article in Journal/Newspaper |
author |
Jensen, Laramie T. Cullen, Jay T. Jackson, Sarah L. Gerringa, Loes J. A. Bauch, Dorothea Middag, Rob Sherrell, Robert M. Fitzsimmons, Jessica N. |
spellingShingle |
Jensen, Laramie T. Cullen, Jay T. Jackson, Sarah L. Gerringa, Loes J. A. Bauch, Dorothea Middag, Rob Sherrell, Robert M. Fitzsimmons, Jessica N. A Refinement of the Processes Controlling Dissolved Copper and Nickel Biogeochemistry: Insights From the Pan‐Arctic |
author_facet |
Jensen, Laramie T. Cullen, Jay T. Jackson, Sarah L. Gerringa, Loes J. A. Bauch, Dorothea Middag, Rob Sherrell, Robert M. Fitzsimmons, Jessica N. |
author_sort |
Jensen, Laramie T. |
title |
A Refinement of the Processes Controlling Dissolved Copper and Nickel Biogeochemistry: Insights From the Pan‐Arctic |
title_short |
A Refinement of the Processes Controlling Dissolved Copper and Nickel Biogeochemistry: Insights From the Pan‐Arctic |
title_full |
A Refinement of the Processes Controlling Dissolved Copper and Nickel Biogeochemistry: Insights From the Pan‐Arctic |
title_fullStr |
A Refinement of the Processes Controlling Dissolved Copper and Nickel Biogeochemistry: Insights From the Pan‐Arctic |
title_full_unstemmed |
A Refinement of the Processes Controlling Dissolved Copper and Nickel Biogeochemistry: Insights From the Pan‐Arctic |
title_sort |
refinement of the processes controlling dissolved copper and nickel biogeochemistry: insights from the pan‐arctic |
publisher |
AGU (American Geophysical Union) |
publishDate |
2022 |
url |
https://oceanrep.geomar.de/id/eprint/56085/ https://oceanrep.geomar.de/id/eprint/56085/1/Jensen%20et%20al.pdf https://oceanrep.geomar.de/id/eprint/56085/7/2021jc018087-sup-0001-supporting https://doi.org/10.1029/2021JC018087 |
long_lat |
ENVELOPE(-169.167,-169.167,70.550,70.550) |
geographic |
Arctic Arctic Ocean Canada Canadian Arctic Archipelago Chukchi Shelf |
geographic_facet |
Arctic Arctic Ocean Canada Canadian Arctic Archipelago Chukchi Shelf |
genre |
Arctic Arctic Archipelago Arctic Arctic Ocean canada basin Canadian Arctic Archipelago Chukchi |
genre_facet |
Arctic Arctic Archipelago Arctic Arctic Ocean canada basin Canadian Arctic Archipelago Chukchi |
op_relation |
https://oceanrep.geomar.de/id/eprint/56085/1/Jensen%20et%20al.pdf https://oceanrep.geomar.de/id/eprint/56085/7/2021jc018087-sup-0001-supporting Jensen, L. T., Cullen, J. T., Jackson, S. L., Gerringa, L. J. A., Bauch, D. , Middag, R., Sherrell, R. M. and Fitzsimmons, J. N. (2022) A Refinement of the Processes Controlling Dissolved Copper and Nickel Biogeochemistry: Insights From the Pan‐Arctic. Open Access Journal of Geophysical Research: Oceans, 127 (5). Art.Nr. e2021JC018087. DOI 10.1029/2021JC018087 <https://doi.org/10.1029/2021JC018087>. doi:10.1029/2021JC018087 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1029/2021JC018087 |
container_title |
Journal of Geophysical Research: Oceans |
container_volume |
127 |
container_issue |
5 |
_version_ |
1790595472595877888 |