Summary
The surface water temperatures were normal for the whole area. The nutrient concentrations were low in all sea areas with exception of HS5 at the Jutland coast (high nitrate) and W Landskrona in the Sound (high silicate). These low values are normal for the season due to the algal blooms. Oxygen concentrations below 2 ml/l were found at depths greater than 80 m in the whole Baltic (from 70 m at Christiansö and in the Hanö Bight). Hydrogen sulphide was found at 80 m at Christiansö, from 75 m in the Hanö Bight and from 140-150 m in the eastern Gotland Basin. During this expedition hydrogen sulphide was also found in the northeastern Baltic at station BY29, 175 meters.