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higher than in the surrounding sea. The biological activity around the Swedish south coast and in the Sound increased significantly during the duration of the cruise. In the Western Gotland Basin and in the Bornholm Basin bottom oxygen concentration was below 0.5 ml/l, a decrease since the latest Last updated: Apr 23, 2014

Skagerrak The surface temperatures varied between 3.3 and 4.8 oC 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 The Last updated: Apr 23, 2014

, 15-40m, and Fladen, 20-30m, high nitrate values were registered, more than twice the normal level, about 25mmol/l. It is probably water from the southern North Sea, which has been transported into the Skagerrak and the Kattegat. Oxygen concentrations less than 2 ml/l were found from 70m and downwards Last updated: Apr 23, 2014

The bottom water oxygen concentrations in Kattegat Proper were not alarming low. In the Belt Sea concentrations below 2 ml/l were recorded at two stations, Fehmarn Belt and Mecklenburger Bucht. No surface accumulations of cyanobacteria were observed. Due to the ongoing inflow oxygen concentrations Last updated: Apr 23, 2014

since the last cruise in September, which is normal for the season. Though, high concentrations of inorganic nitrogen and phosphate were found in certain parts of the Baltic Proper. The silicate concentration in the whole Baltic Proper continued to be highly elevated. Acute hypoxia (O2 < 2 ml/l) was Last updated: Oct 19, 2016

Surface water temperatures were normal for the season in all investigated areas. All nutrients in the surface layer were at low concentrations, which is normal for the season. The oxygen conditions in the Kattegat bottom water were good, while they were relatively poor in the southern Baltic Sea Last updated: Apr 23, 2014

In the Skagerrak and Kattegat, surface water temperatures were normal and sea surface salinity lower than normal in the north. Sea surface salinity was higher than normal in the Sound. Surface temperatures and salinities were normal for the time of year in the Baltic. Nutrient concentrations in Last updated: Apr 23, 2014

found to be 9 metres. Mean and standard deviation for N14 Falkenberg is not based on data from SMHI. Data presented in this report have been subject to preliminary quality control procedures only The Baltic Proper At visited stations in Baltic Proper, sea surface temperature was normal for the season Last updated: Apr 23, 2014

Sad development SMHI have analyzed the oxygen situation in the Baltic Sea during the period 1960 to today. Up to 1999 the oxygen conditions varied largely and both bad and good conditions were found. But after 1999 the extent of areas with total absence of oxygen has increased and is now on a Last updated: Mar 20, 2017

Sea surface temperatures and nutrients levels were mostly normal for the season in all areas. In the Kattegat the oxygen deficit of this year is over and the concentrations in the bottom water were normal for the season. In the Arkona Bassin the oxygen situation in the deep water is again normal Last updated: Apr 23, 2014