{"refrec":{"BRefID":381147,"RR":"<b>Arnone, V.; Santana-Casiano, J.M.; González-Dávila, M.; Planquette, H.; Sarthou, G.; Gerringa, L.J.A.; Gonzalez, A.G.</b> (2023). Natural copper-binding ligands in the Arctic Ocean. The influence of the Transpolar Drift (GEOTRACES GN04). <i>Front. Mar. Sci. 10</i>: 1306278. <a href=\"https://dx.doi.org/10.3389/fmars.2023.1306278\" target=\"_blank\">https://dx.doi.org/10.3389/fmars.2023.1306278</a>","BEntID":378888,"PublicFlag":1,"CheckedFlag":0,"wosflag":1,"vabbflag":0,"RefStringPartII":". <i>Front. Mar. Sci. 10</i>: 1306278. <a href=\"https://dx.doi.org/10.3389/fmars.2023.1306278\" target=\"_blank\">https://dx.doi.org/10.3389/fmars.2023.1306278</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":0,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Arnone, V.; Santana-Casiano, J.M.; González-Dávila, M.; Planquette, H.; Sarthou, G.; Gerringa, L.J.A.; Gonzalez, A.G.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Arnone, V. <i>et al.</i>","Englishabstract":"<span style=\"background-color:rgb(247,247,247);color:rgb(40,40,40);\">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 (L</span><sub>Cu</sub><span style=\"background-color:rgb(247,247,247);color:rgb(40,40,40);\"> and log K</span><sup>cond</sup><sub>Cu2+L</sub><span style=\"background-color:rgb(247,247,247);color:rgb(40,40,40);\">) 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 L</span><sub>Cu</sub><span style=\"background-color:rgb(247,247,247);color:rgb(40,40,40);\"> concentrations (range: 1.40 – 7.91 nM) and log K</span><sup>cond</sup><sub>Cu2+L</sub><span style=\"background-color:rgb(247,247,247);color:rgb(40,40,40);\"> 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 (L</span><sub>Cu</sub><span style=\"background-color:rgb(247,247,247);color:rgb(40,40,40);\"> range: 3.96 – 7.91 nM). In contrast, deep waters (&gt;200 m) showed no significant differences between basins and water masses in terms of L</span><sub>Cu</sub><span style=\"background-color:rgb(247,247,247);color:rgb(40,40,40);\"> concentrations (range: 1.45 – 2.78 nM) and log K</span><sup>cond</sup><sub>Cu2+L</sub><span style=\"background-color:rgb(247,247,247);color:rgb(40,40,40);\"> (range: 14.02 – 15.46). The presence of strong Cu-binding ligands (log K</span><sup>cond</sup><sub>Cu2+L</sub><span style=\"background-color:rgb(247,247,247);color:rgb(40,40,40);\">&gt;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.</span>","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"Natural copper-binding ligands in the Arctic Ocean. 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