Ex situ diffusive oxygen uptake of the Northeast Greenland (NEG) shelf sediments from POLARSTERN cruise PS109 ...

• Main Authors: Felden, Janine, Wenzhöfer, Frank, Braeckman, Ulrike
• Format: Dataset
• Language: English
• Published: PANGAEA 2024
• Subjects: DOU; ex situ; microoptode; oxygen uptake; Event label; Latitude of event; Longitude of event; Date/Time of event; Elevation of event; Method/Device of event; Oxygen uptake, diffusive; Number; Standard deviation; Comment; Multicorer with television; Oxygen Logger Firesting O2-C4 equipped with retractable needle type optodes OXR50, Pyroscience, Firesting; PS109; Polarstern; FRontiers in Arctic marine Monitoring FRAM; Arctic; Greenland
• Online Access: https://dx.doi.org/10.1594/pangaea.959545; https://doi.pangaea.de/10.1594/PANGAEA.959545

Ex situ diffusive oxygen uptake (DOU) at the sediment water interface was assessed on the Northeast Greenland shelf with R/V Polarstern during PS109 between September and October 2017 using a camera-equipped multiple corer (TV-MUC; core area 0.007 m²). Upon arrival on deck, part of the overlying water of three MUC cores was collected and stored separately at in situ temperature. The remaining overlying water was adjusted to 10 cm above the sediment by gently pushing the sediment upwards while avoiding a disturbance of the surface sediment. The cores were then placed in a temperature-controlled water bath in the ship-board laboratory which had been adjusted to the in-situ temperature at the seafloor (information was retrieved from ship-board sensors). A mangetic stirrer was deployed in order to homogenise the overlying water, and a small air pump gently aerated the water. DOU was assessed with 2 oxygen optodes (Pyroscience, Firesting; tip size 50 µm) mounted on an autonomous microprofiler module. Each core ...