Surface water temperatures were low in Skagerrak and Kattegat but normal in the rest of the area. Surface nutrient concentrations were very low in Skagerrak and Kattegat. Surface nutrient concentrations elsewhere were normal, with the exception of phosphate, which was above normal in the Arkona- and Bornholm Basins, and silicate which was also above normal in the western and northern Baltic. Oxygen concentrations below 2 ml/l were found at depths exceeding 60-90 metres In the Baltic Proper, except in the Hanö Bight and the Bornholm Basin. Hydrogen sulphide was found in the eastern-, northern- and western Gotland Basins. A plankton bloom was ongoing in the Skagerrak and the Kattegat.