Summary
In the investigated parts of the Baltic Proper, concentrations of phosphate were higher than normal, while inorganic nitrogen and silicate showed normal values. Oxygen concentrations below 2 ml/l (hypoxia) were found at depth exceeding 55 to 80 metres, while total lack of oxygen (anoxia) was found deeper than 80 to 100 metres in the Baltic Proper. All parameters in the Gulf of Bothnia showed normal values and the oxygen conditions in the deep water were good.