Ex situ measured oxygen profiles from station PS85/460-4 (HG IV) within the HAUSGARTEN area (Fram Strait) in 2014 (POLARSTERN cruise PS85)

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，研究人员使用多管取样器（Multiple corer）获取了沉积物岩芯。所有沉积物岩芯均以-0.75℃的原位温度保存，并采用针式光学溶氧传感器（needle type optodes，直径：50μm，Pyro Science公司制造）测定沉积物-水界面的氧剖面。基于上述氧剖面，通过计算扩散边界层（Diffusive Boundary Layer，DBL）内的氧浓度降幅，即可得到扩散性耗氧速率（diffusive oxygen uptake）。有关该计算方法的详细说明，请参阅相关学术出版物。