Porewater nutrients of the Northeast Greenland (NEG) shelf sediments from POLARSTERN cruise PS109 ...

• Main Authors: Braeckman, Ulrike, Felden, Janine
• Format: Dataset
• Language: English
• Published: PANGAEA 2024
• Subjects: Ammonia; dissolved inorganic carbon DIC; nitrate; nitrite; nutrients; Phosphate; silicate; total organic nitrogen TON; Event label; Latitude of event; Longitude of event; Date/Time of event; Elevation of event; Method/Device of event; Subsample ID; Depth, top/min; Depth, bottom/max; DEPTH, sediment/rock; Sample comment; Nitrite; Nitrate and Nitrite; Silicate; Nitrate; Carbon, inorganic, dissolved; Multicorer with television; Continuous Segmented Flow Analyzer, SEAL Analytical, QuAAtro39; PS109; Polarstern; FRontiers in Arctic marine Monitoring FRAM; Greenland
• Online Access: https://dx.doi.org/10.1594/pangaea.959549; https://doi.pangaea.de/10.1594/PANGAEA.959549

Sediment porewater chemistry (nutrient, DIC, sulfide and sulfate) on the Northeast Greenland shelf were assessed with R/V Polarstern during PS109 between September and October 2017 using two cores with pre-drilled holes mounted on a multiple corer (MUC) a camera-equipped multiple corer (TV-MUC; core area 0.007 m²). Upon arrival on deck, Rhizon samplers were inserted carefully into the holes with intervals of 1 cm until 10 cm sediment depth, and 2 cm intervals until 20 cm sediment depth to extract the sediment porewater. To get a total of 9 ml/l porewater for each depth interval, the porewater from both cores was pooled for each depth. For the analysis of DIC, 2 ml/l porewater from each depth was transferred to a glass vial which had been pre-treated with HgCl₂ and stored at 4°C. DIC concentrations were measured using a flow injection system equipped with the Spark Optimas auto-sampler (model 820, Ambacht, Netherlands). For the determination of porewater nutrients, 4 ml/l of porewater was sampled with ...