Cruise report from R/V Argos week 17, 2013

Summary

Phosphate concentrations in the Baltic Proper remain much higher than normal for the season. Silicate measurements also showed high levels, while nitrate levels were normal. Nutrient concentrations in the Skagerrak, Kattegat and Sound were normal. In the Baltic Proper oxygen concentrations below 2 ml/l were found at depths exceeding 70 to 90 metres. Hydrogen sulphide was found in the bottom water in the Hanö Bight and the Bornholm Basin, in the eastern Gotland Basin from 220 metres and in the western Gotland Basin from 150 metres.