Summary
Nutrient concentrations were normal for the season in all areas. In the south of Kattegat and in the Sound, deeper than 20 meters, oxygen concentrations were under 2 ml/l. In the southwest and south of Baltic, all stations except Arkona basin and Hanö bight had low oxygen values, the lowest being 0.22 ml /l, was observed at BY1.5. Proper and east of Gotland, the oxygen concentrations were under or well under 2 ml/l. Only BY5 was slightly over the 2 ml/l limit. Hydrogen sulphide was present at BY20 and in the western Gotland Basin.