Skagerrak: Surface temperatures varied between 2.5 and 4.5 oC and surface salinites from 30 in the east to 33.5 in the southwest. The pycnocline was located at a depth of 15 meters in the eastern part and at 30 meters along the Jutland coast. A bloom had started along the Swedish west coast and the nutrients showed concentrations below normal in this area. Kattegat and the Sound: The pycnocline was located between 10 and 15 meters depth. The bloom that had already started in January was still ongoing and the nutrients showed concentrations typical for April-May. In the Sound, the situation was more normal with no signs of a spring bloom. The Baltic Proper: Due to bad weather conditions, only stations in the southern and central part of the Baltic Proper were visited. In the southern part the pycnocline was located at a depth of 50 meters, increasing northwards to 90 meters. Surface water temperatures varied between 1.5 and 3 oC. All nutrients, except phosphate, showed normal winter concentrations. Phosphate on the other hand, showed very low concentrations, especially in the Arkona Basin.