Summary
Temperature as well as nutrient conditions in the surface layer were normal for the season in all areas except some temperatures in the Baltic, which were higher. In the Baltic oxygen concentration of the bottom water usually was lower than the mean value of the latest decade. Oxygen concentrations below 2 ml/l was generally found from 70 to 80 metres in the Baltic, in the western Gotland Basin however from 90 m. The area of hydrogen sulphide was not so extended as during last expedition. An inflow of oxygenous saline water contributed to that no hydrogen sulphide could be detected at Christiansö or in the Bornholm Deep. Hydrogen sulphide was not found in the Karlsö Deep either. In return it was found from 125 m in the eastern Gotland Basin, in the northern and northwestern Baltic.