Cruise report from R/V Argos week 43, 1998

Type: Report
Author: Bodil Thorstensson


During the expedition the weather was rather cloudy and windy. In the southern Baltic there was a strong wind from southwest. In the Skagerrak sampling was done only at station P2, because wind velocities more than 20 m/s were forecast. The surface water temperatures were between 8 and 11°C in the whole area. Oxygen concentrations below 2 ml/l were found at depths greater than 70m in the Bornholm Basin and in the Landsort Deep, at 80m or deeper in the northern and eastern Gotland Basin. Hydrogen sulphide was present from 150 m in the Eastern Gotland Basin and from 80 m in the Bornholm Basin. In the surface water the nitrate concentrations were between 0,2-0.3 μmol/l and the phosphate concentrations were of the level 0.1-0.2 μmol/l.The values of ammonia were higher in the southern Baltic - 0.9 μmol/l at station BY1 - to be compared with a normal value of 0.1-0.2 μmol/l.