Surface water temperatures were above normal in the whole area. Salinity in the surface water of the Eastern Gotland Basin was clearly below normal. Surface nutrient concentrations were normal at most stations. Oxygen concentrations below 2 ml/l were present at depths exceeding 70-90 metres. Hydrogen sulphide was found deeper than 90 metres in the Western Gotland Basin and deeper than 125 metres in the Eastern Gotland Basin. Plankton activity was low.