Expeditionsrapporter från utsjöövervakningen

Skagerrak: The surface temperatures varied between 3.3 and 4.8°C and surface salinites from 24 psu in the Baltic water to 33.5 in the remaining area. The spring bloom was almost over, except along the Jutland coast where nitrogen rich water from the North Sea was found. Kattegat and the Sound: …

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 …

The surface water temperatures were: In the Skagerrak 3.5°C - 5.3°C, the Kattegat -0.5°C - 2.7°C and in the Baltic 1.2°C - 3.4°C. The nutrient concentrations in the surface layer in the Kattegat showed lower and chlorophyll much higher values than expected for the season. This means that the …

The surface water temperatures varied between 5,5-7,0°C in the Baltic, 3,5-5,4°C in the Kattegat and 5,8-7,2°C in the Skagerrak. The surface nutrients concentrations showed,for the season, normal values in the whole area. Hydrogen sulphide was present in the Eastern Gotland Basin at station BY 10 …

During the first part of the expedition the weather was dominated by strong winds, reaching storm strength in the Baltic. The second part was dominated by weak to moderate winds. The nutrients showed normal values in the surface water in the whole area. Hydrogen sulphide was detected in the Gotland …

The surface water temperatures varied between 12 -13 degrees in the Skagerrak-Kattegat area and between 10.5-12.5 in the Baltic Proper. The surface layer was depleted of nitrate and the rest of the nutrients showed low values in the Skagerrak-Kattegat. The oxygen situation in the Kattegat deep …

In the Kattegat phytoplankton sampling according to BMP was performed. Maxima of fluorescence were seen in the Kattegat below the halocline at about 20 m and in the Sound at about 10 m. Almost all over the area there were low concentrations of phosphate and depletion of nitrite and nitrate. …

In certain areas of the Baltic proper strong blooms of potentially toxic bluegreen algae (Nodularia) and dinoflagellates were observered. The observations were supported by sharp fluorescence maxima in the water. The extent of oxygen depleted, sulphidic, bottom water in the Gotland Basin had …

In the eastern Skagerrak there were a bloom of a flagellate, Emiliania Huxlley, which gave the surface water a turkos colour and caused low visibility with secchii depths <3m. The surface temperatures varied between 14-15 deg in the Skagerrak-Kattegatt and between 11-13 in the Baltic Proper. The surface layer was generally depleted of nutrients. Fluorocens measurements indicated a subsurface bloom in the whole area between 10 and 20 depth. Continuously measurements of fluorocens at 4 m depth showed highest values just outside of Skagen and in the eastern Gotland basin. There were low oxygen values (< 2ml/l) below 70-100 m depth in the Bornholm basin, the Hanö bight and in the basins east, north and west of Gotland. Hydrogen sulphide was only measured in the Hanö bight at 75m depth and in the eastern Gotland basin, at 240 m depth in the Gotland deep and at 195 m in the Fårö deep.