Sammanfattning
The temperature as well as nutrient conditions in the surface layer were normal for the season in all areas. Oxygen concentrations below 2 ml/l, were found in the Eastern, Western and Northern Gotland Basins at depths exceeding 70 to 80 metres. Hydrogen sulphide was found from 125 metres in the Eastern, from 100 metres in the Northern and from 80 metres in the Western Gotland Basins.