Summary
Surface water temperatures were several degrees above normal. Surface nutrient concentrations were mostly normal. Oxygen concentrations below 2 ml/l were observed at depths exceeding 60 to 80 metres throughout the Baltic Proper and in the bottom water of south-eastern Kattegat and the Sound. Hydrogen sulphide was found at and below 80 metres in the northern and western Gotland Basins and from 125 to150 metres in the eastern Gotland Basin. In the northern and western Gotland Basins the oxygen/hydrogen sulphide conditions were the worst ever recorded.