Summary
The surface water temperatures, as well as the nutrient concentrations were typical for the season. Oxygen concentrations below 2 ml/l were found at depths greater than 70m in the southern Baltc, 80m in the eastern and 60m in the northern Gotland Basins and from 70m in the Bornholm Basin and the Hanö Bight. Hydrogen sulphide was present near the bottom in the eastern Gotland Basin, the Bornholm Basin and in the Hanö Bight. Blooms of bluegreen algae were visible in the south-east Baltic.