Cruise reports from the marine monitoring

During the expedition, which is part of the Swedish national marine monitoring programme, the Skagerrak, the Kattegat, the Sound and the Baltic Proper were visited. During the first part of the survey the winds were mostly from the north, and the air temperature was 0-2℃, but the wind direction …

The expedition was included within SLU:s International Bottom Trawl Survey and covered the Skagerrak and the Kattegat.

Mapping of winter nutrient conditions was performed in the Skagerrak at 11 stations where complete hydrography were sampled, and 10 stations with only CTD. In the Kattegat area 14 …

The surface water, which had been warmer than normal during the autumn and winter, had now cooled down considerably, especially in the Skagerrak and the Kattegat. There the temperature varied between 0.6–3.4 degrees, at most stations there the temperature was below normal in the surface water. …

Surface temperatures in January were above normal in the Baltic Proper and varied from 3.4 in the Kattegat to 6.8 in the Baltic Proper. In the Sound, the Kattegat and the Skagerrak the pycnocline was located from 5-25 m, whereas the surface water was well mixed down to 40-70 m in the Baltic Sea.

Th …

During the expedition, which is part of the Swedish national marine monitoring programme, the Skagerrak, the Kattegat, the Sound, the Baltic Proper and the Gulf of Bothnia was visited. The weather was overcast with moderate to fresh southerly winds in the Gulf of Bothnia and moderate to light winds …

The surface water (0–10 m) had only become slightly colder since October and was warmer than normal at almost all stations, the temperature was 10–12 degrees. The salinity of the surface water in the Baltic Proper was still above normal for the season and varied between 6.6–8.5 psu. In the Kattegat …

The surface water (0–10 m) had cooled down by 3–4 degrees since September and the temperature was now 12–13°C, which is normal for the month. The salinity in the surface water in the Baltic Proper was still above normal for the season and varied between 7-8 psu. In the Skagerrak and the Kattegat, …

The surface water (0-10 m) in the northern parts of the Baltic Proper had for the season normal temperature. But in the Arkona Basin, the Bornholm Basin and the Bight of Hanö the sea surface temperature was above normal. In the Kattegat and the Skagerrak there were mostly normal sea surface …

SMHI performed an oxygen survey within SLU-Aqua’s cruise; the International Bottom Trawl Survey, that covers the Skagerrak and the Kattegat. SMHI joined the cruise to perform CTD measurements in connection to each trawl and to take water samples for the annual oxygen survey. Samples for nutrients …

The surface water was, unlike in June, warmer than normal at most stations in the Baltic Proper, but mostly normal in the Kattegat and the Skagerrak. The surface water temperature varied between 18-21 degrees, of which the highest temperatures were measured in the Baltic Proper. The salinity of the …