Natural copper-binding ligands in the Arctic Ocean. The influence of the Transpolar Drift (GEOTRACES GN04)
The Arctic Ocean is a unique biogeochemical environment characterized by low salinity surface waters, extensive sea-ice coverage, high riverine inputs, large shelf extension and the long residence time of deep waters. These characteristics determine the distribution of dissolved bio-essential trace...
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Language: | English |
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2023
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Online Access: | https://doi.org/10.3389/fmars.2023.1306278 https://doaj.org/article/089b8e07e9ed4de98b3c83c3ce900ed8 |
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ftdoajarticles:oai:doaj.org/article:089b8e07e9ed4de98b3c83c3ce900ed8 2024-01-14T09:59:05+01:00 Natural copper-binding ligands in the Arctic Ocean. The influence of the Transpolar Drift (GEOTRACES GN04) Veronica Arnone J. Magdalena Santana-Casiano Melchor González-Dávila Hélène Planquette Géraldine Sarthou Loes J. A. Gerringa Aridane G. González 2023-12-01T00:00:00Z https://doi.org/10.3389/fmars.2023.1306278 https://doaj.org/article/089b8e07e9ed4de98b3c83c3ce900ed8 EN eng Frontiers Media S.A. https://www.frontiersin.org/articles/10.3389/fmars.2023.1306278/full https://doaj.org/toc/2296-7745 2296-7745 doi:10.3389/fmars.2023.1306278 https://doaj.org/article/089b8e07e9ed4de98b3c83c3ce900ed8 Frontiers in Marine Science, Vol 10 (2023) copper copper-binding ligands voltammetric method Arctic Ocean Transpolar Drift Science Q General. Including nature conservation geographical distribution QH1-199.5 article 2023 ftdoajarticles https://doi.org/10.3389/fmars.2023.1306278 2023-12-17T01:43:55Z The Arctic Ocean is a unique biogeochemical environment characterized by low salinity surface waters, extensive sea-ice coverage, high riverine inputs, large shelf extension and the long residence time of deep waters. These characteristics determine the distribution of dissolved bio-essential trace metals, such as copper (Cu), and the dissolved organic-binding ligands capable of complexing it. This work reports the concentrations and conditional stability constants of dissolved Cu-binding ligands (LCu and log KcondCu2+L) measured in samples from the Polarstern (PS94) expedition, as part of the international GEOTRACES program (cruise GN04). Full-depth profile stations from the Barents Sea, Nansen Basin, Amundsen Basin and Makarov Basin were analysed by competitive ligand exchange-adsorptive cathodic stripping voltammetry (CLE-AdCSV). The basins and water masses presented a wide range of LCu concentrations (range: 1.40 – 7.91 nM) and log KcondCu2+L values (range: 13.83 – 16.01). The highest variability of Cu-binding ligand concentrations was observed in surface waters (≤200 m), and mean concentrations increased from the Barents Sea and Nansen Basin (2.15 ± 0.31 nM and 1.93 ± 0.35 nM, respectively) to the Amundsen (3.84 ± 1.69 nM) and Makarov Basins (4.40± 2.03 nM). The influence of the Transpolar Drift (TDP) flow path was observed in the Amundsen and Makarov Basins, especially on Cu-binding ligand concentrations (LCu range: 3.96 – 7.91 nM). In contrast, deep waters (>200 m) showed no significant differences between basins and water masses in terms of LCu concentrations (range: 1.45 – 2.78 nM) and log KcondCu2+L (range: 14.02 – 15.46). The presence of strong Cu-binding ligands (log KcondCu2+L>13) in surface waters stabilises the excess of dissolved copper (dCu) transported in the TPD and favours its export to the Fram Strait and Nordic Seas. Article in Journal/Newspaper amundsen basin Arctic Arctic Ocean Barents Sea Fram Strait makarov basin Nansen Basin Nordic Seas Sea ice Directory of Open Access Journals: DOAJ Articles Amundsen Basin ENVELOPE(74.000,74.000,87.000,87.000) Arctic Arctic Ocean Barents Sea Makarov Basin ENVELOPE(170.000,170.000,87.000,87.000) Frontiers in Marine Science 10 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
copper copper-binding ligands voltammetric method Arctic Ocean Transpolar Drift Science Q General. Including nature conservation geographical distribution QH1-199.5 |
spellingShingle |
copper copper-binding ligands voltammetric method Arctic Ocean Transpolar Drift Science Q General. Including nature conservation geographical distribution QH1-199.5 Veronica Arnone J. Magdalena Santana-Casiano Melchor González-Dávila Hélène Planquette Géraldine Sarthou Loes J. A. Gerringa Aridane G. González Natural copper-binding ligands in the Arctic Ocean. The influence of the Transpolar Drift (GEOTRACES GN04) |
topic_facet |
copper copper-binding ligands voltammetric method Arctic Ocean Transpolar Drift Science Q General. Including nature conservation geographical distribution QH1-199.5 |
description |
The Arctic Ocean is a unique biogeochemical environment characterized by low salinity surface waters, extensive sea-ice coverage, high riverine inputs, large shelf extension and the long residence time of deep waters. These characteristics determine the distribution of dissolved bio-essential trace metals, such as copper (Cu), and the dissolved organic-binding ligands capable of complexing it. This work reports the concentrations and conditional stability constants of dissolved Cu-binding ligands (LCu and log KcondCu2+L) measured in samples from the Polarstern (PS94) expedition, as part of the international GEOTRACES program (cruise GN04). Full-depth profile stations from the Barents Sea, Nansen Basin, Amundsen Basin and Makarov Basin were analysed by competitive ligand exchange-adsorptive cathodic stripping voltammetry (CLE-AdCSV). The basins and water masses presented a wide range of LCu concentrations (range: 1.40 – 7.91 nM) and log KcondCu2+L values (range: 13.83 – 16.01). The highest variability of Cu-binding ligand concentrations was observed in surface waters (≤200 m), and mean concentrations increased from the Barents Sea and Nansen Basin (2.15 ± 0.31 nM and 1.93 ± 0.35 nM, respectively) to the Amundsen (3.84 ± 1.69 nM) and Makarov Basins (4.40± 2.03 nM). The influence of the Transpolar Drift (TDP) flow path was observed in the Amundsen and Makarov Basins, especially on Cu-binding ligand concentrations (LCu range: 3.96 – 7.91 nM). In contrast, deep waters (>200 m) showed no significant differences between basins and water masses in terms of LCu concentrations (range: 1.45 – 2.78 nM) and log KcondCu2+L (range: 14.02 – 15.46). The presence of strong Cu-binding ligands (log KcondCu2+L>13) in surface waters stabilises the excess of dissolved copper (dCu) transported in the TPD and favours its export to the Fram Strait and Nordic Seas. |
format |
Article in Journal/Newspaper |
author |
Veronica Arnone J. Magdalena Santana-Casiano Melchor González-Dávila Hélène Planquette Géraldine Sarthou Loes J. A. Gerringa Aridane G. González |
author_facet |
Veronica Arnone J. Magdalena Santana-Casiano Melchor González-Dávila Hélène Planquette Géraldine Sarthou Loes J. A. Gerringa Aridane G. González |
author_sort |
Veronica Arnone |
title |
Natural copper-binding ligands in the Arctic Ocean. The influence of the Transpolar Drift (GEOTRACES GN04) |
title_short |
Natural copper-binding ligands in the Arctic Ocean. The influence of the Transpolar Drift (GEOTRACES GN04) |
title_full |
Natural copper-binding ligands in the Arctic Ocean. The influence of the Transpolar Drift (GEOTRACES GN04) |
title_fullStr |
Natural copper-binding ligands in the Arctic Ocean. The influence of the Transpolar Drift (GEOTRACES GN04) |
title_full_unstemmed |
Natural copper-binding ligands in the Arctic Ocean. The influence of the Transpolar Drift (GEOTRACES GN04) |
title_sort |
natural copper-binding ligands in the arctic ocean. the influence of the transpolar drift (geotraces gn04) |
publisher |
Frontiers Media S.A. |
publishDate |
2023 |
url |
https://doi.org/10.3389/fmars.2023.1306278 https://doaj.org/article/089b8e07e9ed4de98b3c83c3ce900ed8 |
long_lat |
ENVELOPE(74.000,74.000,87.000,87.000) ENVELOPE(170.000,170.000,87.000,87.000) |
geographic |
Amundsen Basin Arctic Arctic Ocean Barents Sea Makarov Basin |
geographic_facet |
Amundsen Basin Arctic Arctic Ocean Barents Sea Makarov Basin |
genre |
amundsen basin Arctic Arctic Ocean Barents Sea Fram Strait makarov basin Nansen Basin Nordic Seas Sea ice |
genre_facet |
amundsen basin Arctic Arctic Ocean Barents Sea Fram Strait makarov basin Nansen Basin Nordic Seas Sea ice |
op_source |
Frontiers in Marine Science, Vol 10 (2023) |
op_relation |
https://www.frontiersin.org/articles/10.3389/fmars.2023.1306278/full https://doaj.org/toc/2296-7745 2296-7745 doi:10.3389/fmars.2023.1306278 https://doaj.org/article/089b8e07e9ed4de98b3c83c3ce900ed8 |
op_doi |
https://doi.org/10.3389/fmars.2023.1306278 |
container_title |
Frontiers in Marine Science |
container_volume |
10 |
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1788056563793002496 |