The the underwater photosynthetically active radiation (PAR) at the station Faro (62° 13.35' S, 58° 40.47' W) and at Isla D (62° 13.31' S, 58° 38.30' W) were measured with Odyssey PAR-sensors (Odyssey Photosynthetic Irradiance Recording System, Data Flow Systems, Christchurch, New Zealand), installed approximately 0.5 m above the seafloor at 10 m water depth in 2015. Data from Isla D only encompass the period 11th February - 4th April and 16th November - 31st December, as the sensor was damaged probably by passing chunks of ice. The PAR-sensors were calibrated according to Deregibus et al. (2016) and measured with a maximum temporal resolution of 30 minutes.