Ex situ measured oxygen profiles from station PS93/058-17 (EG IV) within the HAUSGARTEN area (Fram Strait) in 2015 (POLARSTERN cruise PS93.2)

During PS85 (in 2014) and PS93.2 (in 2015) sediment cores were recovered by a Multiple corer. Sediment cores were stored at in situ temperature of -0.75°C and used to measure oxygen profiles across the sediment-water interface with needle type optodes (diameter: 50µm, Pyro Science). By using the profiles, the diffusive oxygen uptake was calculated via the decrease in the oxygen concentration in the Diffusive Boundary Layer (DBL). For a further description of the calculation, please check the related publication.

2014年PS85航次与2015年PS93.2航次期间，研究人员采用多管沉积物采样器（Multiple corer）采集了沉积物岩芯。所有沉积物岩芯均保存于-0.75℃的原位温度环境中，随后被用于测定沉积物-水界面的氧分布剖面，测定所用设备为针型光学溶解氧传感器（needle type optodes，直径：50μm，Pyro Science）。基于上述剖面数据，研究人员通过计算扩散边界层（Diffusive Boundary Layer，DBL）内的氧浓度降幅，推算了沉积物的扩散性耗氧速率（diffusive oxygen uptake）。有关该计算过程的详细说明，请参阅相关研究文献。