Pore water geochemistry of arctic deep sea sediments measured at station MSM16/2_809-1 (Sample 16,Reference)

• Main Authors: Felden, Janine, Boetius, Antje
• Format: Dataset
• Language: English
• Published: PANGAEA 2013
• Subjects: Alkalinity; total; Ammonium; Carbon; inorganic; dissolved; DEPTH; sediment/rock; ESONET; European Seafloor Observatory Network; Flow injection analysis (Hall and Aller 1992); HERMIONE; Hotspot Ecosystem Research and Mans Impact On European Seas; Ion chromatography; LOOME; Maria S. Merian; MSM16/2; MSM16/2_809-1; MUC; MultiCorer; Nitrate; Nitrite; North Atlantic; Phosphate; Photometer; methylene blue (Cline 1969); Seawater analysis after Grasshoff et al.; 1983 (Verlag Chemie GmbH Weinheim); Silicate; Sulfate; Sulfide; Two-point titration (Edmond 1970); Arctic
• Online Access: https://doi.pangaea.de/10.1594/PANGAEA.810910; https://doi.org/10.1594/PANGAEA.810910

Pore water and turnover rates were determined for surface sediment cores obtained in 2009 and 2010. The pore water was extracted with Rhizons (Rhizon CSS: length 5 cm, pore diameter 0.15 µm; Rhizosphere Research Products, Wageningen, Netherlands) in 1 cm-resolution and immediately fixed in 5% zinc acetate (ZnAc) solution for sulfate, and sulfide analyses. The samples were diluted, filtered and the concentrations measured with non-suppressed anion exchange chromatography (Waters IC-Pak anion exchange column, waters 430 conductivity detector). The total sulfide concentrations (H2S + HS- + S**2-) were determined using the diamine complexation method (doi:10.4319/lo.1969.14.3.0454). Samples for dissolved inorganic carbon (DIC) and alkalinity measurements were preserved by adding 2 µl saturated mercury chloride (HgCl2) solution and stored headspace-free in gas-tight glass vials. DIC and alkalinity were measured using the flow injection method (detector VWR scientific model 1054) (doi:10.4319/lo.1992.37.5.1113). Dissolved sulfide was eliminated prior to the DIC measurement by adding 0.5 M molybdate solution (doi:10.4319/lo.1995.40.5.1011). Nutrient subsamples (10 - 15 ml) were stored at – 20 °C prior to concentration measurements with a Skalar Continuous-Flow Analyzer (doi:10.1002/9783527613984).