Distribution of copper-binding ligands in Fram Strait and influences from the Greenland Shelf (GEOTRACES GN05)

The Fram Strait represents the major gateway of Arctic Ocean waters towards the Nordic Seas and North Atlantic Ocean and is a key region to study the impact of climate change on biogeochemical cycles. In the region, information about trace metal speciation, such as copper, is scarce. This manuscript...

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Autores: Arnone, Veronica, Santana-Casiano, J. Magdalena, González-Dávila, Melchor, Sarthou, Géraldine, Krisch, Stephan, Lodeiro, Pablo, Achterberg, Eric P., González, Aridane G.
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2024
País:España
Institución:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
Repositorio:Recercat. Dipósit de la Recerca de Catalunya
OAI Identifier:oai:recercat.cat:10459.1/464750
Acceso en línea:https://doi.org/10.1016/j.scitotenv.2023.168162
https://hdl.handle.net/10459.1/464750
Access Level:acceso abierto
Palabra clave:Copper
Fram Strait
Northeast Greenland shelf
Compostos bioactius
Canvis climàtics
Ferroelectricitat
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spelling Distribution of copper-binding ligands in Fram Strait and influences from the Greenland Shelf (GEOTRACES GN05)Arnone, VeronicaSantana-Casiano, J. MagdalenaGonzález-Dávila, MelchorSarthou, GéraldineKrisch, StephanLodeiro, PabloAchterberg, Eric P.González, Aridane G.CopperFram StraitNortheast Greenland shelfCompostos bioactiusCanvis climàticsFerroelectricitatThe Fram Strait represents the major gateway of Arctic Ocean waters towards the Nordic Seas and North Atlantic Ocean and is a key region to study the impact of climate change on biogeochemical cycles. In the region, information about trace metal speciation, such as copper, is scarce. This manuscript presents the concentrations and conditional stability constants of copper-binding ligands (LCu and log KcondCu2+L) in the water column of Fram Strait and the Greenland shelf (GEOTRACES cruise GN05). Cu-binding ligands were analysed by Competitive Ligand Exchange-Adsorptive Cathodic Stripping Voltammetry (CLE-ACSV) using salicylaldoxime (SA) as competitive ligand. Based on water masses and the hydrodynamic influences, three provinces were considered (coast, shelf, and Fram Strait) and differences were observed between regions and water masses. The strongest variability was observed in surface waters, with increasing LCu concentrations (mean values: Fram Strait = 2.6 ± 1.0 nM; shelf = 5.2 ± 1.3 nM; coast = 6.4 ± 0.8 nM) and decreasing log KcondCu2+L values (mean values: Fram Strait = 15.7 ± 0.3; shelf = 15.2 ± 0.3; coast = 14.8 ± 0.3) towards the west. The surface LCu concentrations obtained above the Greenland shelf indicate a supply from the coastal environment to the Polar Surface Water (PSW) which is an addition to the ligand exported from the central Arctic to Fram Strait. The significant differences (in terms of LCu and log KcondCu2+L) between shelf and coastal samples were explained considering the processes which modify ligand concentrations and binding strengths, such as biological activity in sea-ice, phytoplankton bloom in surface waters, bacterial degradation, and meltwater discharge from 79NG glacier terminus. Overall, the ligand concentration exceeded those of dissolved Cu (dCu) and kept the free copper (Cu2+) concentrations at femtomolar levels (0.13–21.13 fM). This indicates that Cu2+ toxicity limits were not reached and dCu levels were stabilized in surface waters by organic complexes, which favoured its transport to the Nordic Seas and North Atlantic Ocean and the development of microorganism.The authors would like to thank captain Schwarze and his crew of the RV Polarstern, the chief scientist Torsten Kanzow and all other participants, for their effort and support during sample collection. We also acknowledge the financial support for the ATOPFe project (CTM2017-83476-P) from the Ministerio de Ciencia e Innovación (Spain). VA participation was funded by the PhD grant (PRE 2018-084476). AGG participation was partially funded by LabexMER International Postdoctoral Program for providing fellowship and Laboratoire d'Excellence LabexMer (ANR-10-LABX-19). PL also thank the support from the Ministerio de Ciencia, Innovación y Universidades of Spain and University of Lleida (Beatriz Galindo Senior award number BG20/00104).Elsevier2024info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttps://doi.org/10.1016/j.scitotenv.2023.168162https://hdl.handle.net/10459.1/464750reponame:Recercat. Dipósit de la Recerca de Catalunyainstname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)Inglésinfo:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/CTM2017-83476-PReproducció del document publicat a https://doi.org/10.1016/j.scitotenv.2023.168162Science of the Total Environment, 2024, vol. 909, núm. 168162, p. 1-14cc- by-nc (c) Arnone et al., 2024Attribution-NonCommercial 4.0 Internationalinfo:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc/4.0/oai:recercat.cat:10459.1/4647502026-05-29T05:05:01Z
dc.title.none.fl_str_mv Distribution of copper-binding ligands in Fram Strait and influences from the Greenland Shelf (GEOTRACES GN05)
title Distribution of copper-binding ligands in Fram Strait and influences from the Greenland Shelf (GEOTRACES GN05)
spellingShingle Distribution of copper-binding ligands in Fram Strait and influences from the Greenland Shelf (GEOTRACES GN05)
Arnone, Veronica
Copper
Fram Strait
Northeast Greenland shelf
Compostos bioactius
Canvis climàtics
Ferroelectricitat
title_short Distribution of copper-binding ligands in Fram Strait and influences from the Greenland Shelf (GEOTRACES GN05)
title_full Distribution of copper-binding ligands in Fram Strait and influences from the Greenland Shelf (GEOTRACES GN05)
title_fullStr Distribution of copper-binding ligands in Fram Strait and influences from the Greenland Shelf (GEOTRACES GN05)
title_full_unstemmed Distribution of copper-binding ligands in Fram Strait and influences from the Greenland Shelf (GEOTRACES GN05)
title_sort Distribution of copper-binding ligands in Fram Strait and influences from the Greenland Shelf (GEOTRACES GN05)
dc.creator.none.fl_str_mv Arnone, Veronica
Santana-Casiano, J. Magdalena
González-Dávila, Melchor
Sarthou, Géraldine
Krisch, Stephan
Lodeiro, Pablo
Achterberg, Eric P.
González, Aridane G.
author Arnone, Veronica
author_facet Arnone, Veronica
Santana-Casiano, J. Magdalena
González-Dávila, Melchor
Sarthou, Géraldine
Krisch, Stephan
Lodeiro, Pablo
Achterberg, Eric P.
González, Aridane G.
author_role author
author2 Santana-Casiano, J. Magdalena
González-Dávila, Melchor
Sarthou, Géraldine
Krisch, Stephan
Lodeiro, Pablo
Achterberg, Eric P.
González, Aridane G.
author2_role author
author
author
author
author
author
author
dc.subject.none.fl_str_mv Copper
Fram Strait
Northeast Greenland shelf
Compostos bioactius
Canvis climàtics
Ferroelectricitat
topic Copper
Fram Strait
Northeast Greenland shelf
Compostos bioactius
Canvis climàtics
Ferroelectricitat
description The Fram Strait represents the major gateway of Arctic Ocean waters towards the Nordic Seas and North Atlantic Ocean and is a key region to study the impact of climate change on biogeochemical cycles. In the region, information about trace metal speciation, such as copper, is scarce. This manuscript presents the concentrations and conditional stability constants of copper-binding ligands (LCu and log KcondCu2+L) in the water column of Fram Strait and the Greenland shelf (GEOTRACES cruise GN05). Cu-binding ligands were analysed by Competitive Ligand Exchange-Adsorptive Cathodic Stripping Voltammetry (CLE-ACSV) using salicylaldoxime (SA) as competitive ligand. Based on water masses and the hydrodynamic influences, three provinces were considered (coast, shelf, and Fram Strait) and differences were observed between regions and water masses. The strongest variability was observed in surface waters, with increasing LCu concentrations (mean values: Fram Strait = 2.6 ± 1.0 nM; shelf = 5.2 ± 1.3 nM; coast = 6.4 ± 0.8 nM) and decreasing log KcondCu2+L values (mean values: Fram Strait = 15.7 ± 0.3; shelf = 15.2 ± 0.3; coast = 14.8 ± 0.3) towards the west. The surface LCu concentrations obtained above the Greenland shelf indicate a supply from the coastal environment to the Polar Surface Water (PSW) which is an addition to the ligand exported from the central Arctic to Fram Strait. The significant differences (in terms of LCu and log KcondCu2+L) between shelf and coastal samples were explained considering the processes which modify ligand concentrations and binding strengths, such as biological activity in sea-ice, phytoplankton bloom in surface waters, bacterial degradation, and meltwater discharge from 79NG glacier terminus. Overall, the ligand concentration exceeded those of dissolved Cu (dCu) and kept the free copper (Cu2+) concentrations at femtomolar levels (0.13–21.13 fM). This indicates that Cu2+ toxicity limits were not reached and dCu levels were stabilized in surface waters by organic complexes, which favoured its transport to the Nordic Seas and North Atlantic Ocean and the development of microorganism.
publishDate 2024
dc.date.none.fl_str_mv 2024
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv https://doi.org/10.1016/j.scitotenv.2023.168162
https://hdl.handle.net/10459.1/464750
url https://doi.org/10.1016/j.scitotenv.2023.168162
https://hdl.handle.net/10459.1/464750
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/CTM2017-83476-P
Reproducció del document publicat a https://doi.org/10.1016/j.scitotenv.2023.168162
Science of the Total Environment, 2024, vol. 909, núm. 168162, p. 1-14
dc.rights.none.fl_str_mv cc- by-nc (c) Arnone et al., 2024
Attribution-NonCommercial 4.0 International
info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc/4.0/
rights_invalid_str_mv cc- by-nc (c) Arnone et al., 2024
Attribution-NonCommercial 4.0 International
http://creativecommons.org/licenses/by-nc/4.0/
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:Recercat. Dipósit de la Recerca de Catalunya
instname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
instname_str Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
reponame_str Recercat. Dipósit de la Recerca de Catalunya
collection Recercat. Dipósit de la Recerca de Catalunya
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