Summary
The bottom water oxygen conditions in the Kattegat were good, > 4.5 ml/l. At W Landskrona in the Sound, oxygen concentration in the bottom water was 2.58 ml/l. In the Baltic Proper oxygen concentrations below 2 ml/l were found at depths exceeding 60 to 70 metres. Hydrogen sulphide was found in the Bornholm Basin, at BY15 (Gotland deep) and in the northern and western Gotland Basins. In Kattegat, silicate showed lower values than normal. In the Baltic Proper, phosphate as well as silicate showed enhanced concentrations while nitrate were somewhat lower than normal.