Summary
Nutrient concentrations were higher than normal for the season in the central Skagerrak. Phosphate and silicate concentrations were enhanced in the southern Baltic and in the Sound. Measurements of fluorescence and oxygen saturation indicated that the spring bloom was underway in the Kattegat and southeastern Baltic. In the Baltic Proper, oxygen concentrations were below 2 ml/l at depths exceeding 80 metres. The oxygen situation in the Arkona and Bornholm Basins was good however, because of the salt water inflows during the first months this year. Hydrogen sulphide was found in the eastern and western Gotland Basin.