FN Archimer Export Format
PT J
TI Natural copper-binding ligands in the Arctic Ocean. The influence of the Transpolar Drift (GEOTRACES GN04)
BT 
AF Arnone, Veronica
   Santana-Casiano, J. Magdalena
   González-Dávila, Melchor
   Planquette, Helene
   Sarthou, Geraldine
   Gerringa, Loes J. A.
   González, Aridane G.
AS 1:1;2:1;3:1;4:2;5:2;6:3;7:1;
FF 1:;2:;3:;4:;5:;6:;7:;
C1 Instituto de Oceanografía y Cambio Global, IOCAG, Universidad de Las Palmas de Gran Canaria, ULPGC, Las Palmas de Gran Canaria, Spain
   univ Brest, CNRS, IRD, Ifremer, LEMAR, Plouzané, France
   Department of Ocean Systems, Royal Netherlands Institute for Sea Research, NIOZ, Den Hoorn, Netherlands
C2 UNIV LAS PALMAS GRAN CANARIA, SPAIN
   CNRS, FRANCE
   NIOZ, NETHERLANDS
UM LEMAR
IN WOS Cotutelle UMR
   DOAJ
   copubli-europe
IF 3.7
TC 0
UR https://archimer.ifremer.fr/doc/00869/98126/107415.pdf
   https://archimer.ifremer.fr/doc/00869/98126/107416.docx
LA English
DT Article
DE ;copper;copper-binding ligands;voltammetric method;Arctic Ocean;Transpolar Drift
AB 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. 
PY 2023
PD DEC
SO Frontiers In Marine Science
SN 2296-7745
PU Frontiers Media SA
VL 10
UT 001130472300001
DI 10.3389/fmars.2023.1306278
ID 98126
ER

EF