Summary
The water temperature was to some extent elevated in the north Baltic Proper. Nutrient concentrations were normal in most basins with the exception of the southern and eastern parts of the Baltic Proper where phosphate showed elevated concentrations. The spring blooms had not started in the Baltic Proper, while it was in an initial phase at some stations in Skagerrak and Kattegat. Oxygen concentrations lower than 2 ml/l were present in the whole Baltic Proper however the oxygen situation was good in the Arkona Basin, Hanö Bight and in the western parts of the Bornholm Basin due to an inflow that occurred earlier this year. Hydrogen sulphide occurred in the Gulf of Gdansk and in the Eastern, Northern and Western Gotland Basin.