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The Baltic Sea appears to be warming up faster than other world oceans, and climate change is altering its characteristics and circulation patterns.

The integrated (0-20 meters) chlorophyll a concentrations were low at all of the Skagerrak sampling sites, which is normal for the season. The species diversity was quite divers low at the Skagerrak stations but with low abundance of each species. Only a few species of diatoms were found and the …

During the mid April phytoplankton sampling the species diversity was very low at the Skagerrak stations. Whereas the total cell counts were the highest one month earlier at Å17, the situation was the opposite now with no diatoms. A few ciliates, small flagellates and dinoflagellates were present. …

The phytoplankton samples from the Skagerrak station Å17 had the highest diversity of the plankton stations in the Western Sea in mid-March. Diatoms were the most frequent and the diatom Leptocylindrus danicus the most numerous species. At Släggö and at the Kattegat stations the species diversity …

Extraordinarily high levels of chlorophyll a and high cell numbers were found in the Skagerrak and Kattegat areas in mid January. The diatoms Skeletonema costatum, Pseudo-nitzschia delicatissima-group and Thalassiosira nordenskioeldii dominated the phytoplankton samples. P. delicatissima-group was …

The phytoplankton situation in the Skagerrak and Kattegat areas was relatively stable compared to the sampling three weeks earlier. However, there were no chlorophyll fluorescence peaks to speak of. Only at W Landskrona on the edge of the Sound an extra phytoplankton sampling was made at 15 meters …

The integrated (0-20 meters) chlorophyll a concentrations were normal for the season at most of the Skagerrak and Kattegat sampling sites. The only exception was Släggö with lower concentrations than normal and Anholt E with higher concentration than normal. The plankton community was relatively …

The phytoplankton species diversity was rather high in the Skagerrak and Kattegat areas although the number of cells was higher in the latter. Diatoms dominated the samples and chlorophyll a concentrations were at average at all stations but somewhat enhanced, within the limits, at Å13 in the …

Surface water temperatures and nutrient levels were normal in the whole area. Oxygen levels in the bottom water of the Arkona Basin were good. At BY4 (Christiansö) in the Bornholm Basin new water, with an oxygen content of nearly 4 ml/l, had penetrated in close to the bottom. In the intermediate …