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 determine diffusive and total oxygen fluxes, benthic community densities, the bioturbation potential and the solute exchange. Further, autonomous benthic lander was deployed at the HAUSGARTEN stations HG I and HG IV and used to determine also diffusive and total oxygen fluxes and benthic community densities and biomass.

During PS85 (in 2014) and PS93.2 (in 2015) autonomous benthic lander were deployed at the HAUSGARTEN stations HG I and HG IV. The lander was equipment with a profiler unit, which holds electrochemical, needly type oxygen sensors in order to measure oxygen profiles across the sediment-water interface. 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.

Supplement to: Hoffmann, Ralf; Braeckman, Ulrike; Hasemann, Christiane; Wenzhöfer, Frank (2018): Deep-sea benthic communities and oxygen fluxes in the Arctic Fram Strait controlled by sea-ice cover and water depth. Biogeosciences, 15(16), 4849-4869