Dissolved iron measured on board with Flow injection analysis and iron-binding dissolved organic ligands from Ultra Clean CTD collected depth profiles during GEOTRACES PS94 Arctic cruise on Polarstern

• Main Authors: Gerringa, Loes J A, Rijkenberg, Micha J A, Slagter, Hans A
• Format: Dataset
• Language: English
• Published: PANGAEA 2018
• Subjects: Absorption coefficient; colored dissolved organic matter at 254 nm; colored dissolved organic matter at 300 nm; after Laglera et al. (2007); Arctic Ocean; ARK-XXIX/3; Barents Sea; Bottle number; Cast number; Cathodic stripping voltammetry: Metrohm 663 VA stand; control hardware (Metrohm Autolab II and IME 663); after Croot and Johansson (2000) and calculated after Gerringa et al. (2014); CTD/Rosette; ultra clean; CTD-UC; Date/Time of event; DEPTH; water; Event label; Flow injection analysis (Rijkenberg et al. 2018); Fluorescence; colored dissolved organic matter; GEOTRACES; Global marine biogeochemical cycles of trace elements and their isotopes; Humic substances; Iron; dissolved; standard deviation; inorganic; conditional stability constants; Latitude of event; Ligand concentration; Longitude of event; Norwegian Sea; Polarstern; PS94; PS94/004-2; PS94/032-4; PS94/040-2; PS94/050-3; Arctic
• Online Access: https://doi.pangaea.de/10.1594/PANGAEA.890975; https://doi.org/10.1594/PANGAEA.890975

Data from Polarstern cruise PS94 in the Arctic in 2015 with chief scientist Ursula Schauer. In order to explain geochemical cycles of Fe in the ocean, M. Rijkenberg, L. Gerringa and H. Slagter a.o. sampled filtered seawater using an ultra clean titanium CTD. In these samples on board measurements were executed: dissolved Fe by flow injection analysis and the characteristics of the dissolved organic Fe-binding organic ligands (totalL); characteristics being the concentration of these ligands and the conditional binding constant of the Fe-complex (K' expressed as its logarithm: logK). Moreover in order to relate the dissolved organic Fe-binding organic ligands to humic substances, fluorescence of dissolved organic matter was measured as well as humic substances using voltammetry.