Expeditionsrapport från U/F Argos vecka 49-50, 1998
Författare: Bodil Thorstensson
The surface water temperatures were between 4.6 and 6.4°C in the Baltic, between 1.8-2.8°C in the Sound and in the Kattegat and between 3.1-5.5°C in the Skagerrak. Oxygen concentrations below 2 ml/l were found at 70 m or deeper in the southeastern Baltic, in the Bornholm Basin and Hanö Bight, at 80 m or deeper in the East Gotland Basin and at the Karlsö Deep. Hydrogen sulphide was present from 150 m in the East Gotland Basin, from 80m in the Bornholm Basin and in the Hanö Bight at 79 m. The bottom water had 50% oxygen saturation in the station W Landskrona. In the Baltic surface water the phosphate concentrations were between 0.30-0.45 μmol/l and the nitrate concentrations were of the level 2.0-2.9 μmol/l. The nitrate values of the Kattegat and the Sound were between 3.7-5.1 μmol/l and between 4.8-5.6 μmol/l in the Skagerrak.