Total oxygen fluxes of four sediment cores from Faro (Potter Cove, Antarctica) exposed to increasing light intensities measured in November 2016@en

Four sediment cores (50 cm length, 10 cm diameter) were collected from the Faro station (located in Potter Cove) by SCUBA divers in November 2016. The sediment cores were stored in a water bath at in situ temperature of 0.5°C. A magnetic stirrer was inserted into the core and the overlying water was permanently aerated. Thereby, the overlying water was kept homogeneous and oxygen saturated. Cold-light lamps (Osram Lumilux Cool Daylight L36W/865, Osram, Munich, Germany) were installed above the sediment cores and the emitted photosynthetically active radiation (PAR) was permanently controlled with a spherical PAR-sensor (US-SQS/L and ULM-500, Walz, Germany). The spherical PAR-sensor was placed in the water bath, adjusted to the lowest height of the sediment surface of the sediment cores, covered with sea-water and treated similar to the sediment cores. […]