Summary
Surface water temperatures in the Skagerrak, the Kattegat and the Baltic were normal. Nutrient concentrations were normal in the surface waters. Oxygen concentrations below 2 ml/l were found in the Baltic Proper at depths exceeding 60 to 80 metres. In the Western Gotland Basin hydrogen sulphide was found from 80 metres and below. In the northern Gotland Basin hydrogen sulphide began at a depth of 125 metres in the Landsort Deep (BY31) and at 90 metres in the northeast (BY29). In the eastern Gotland Basin hydrogen sulphide was found from 125 metres and below. In the Bornholm Basin hydrogen sulphide remained only at Christiansö (BY4).