The total cell concentrations in the open Skagerrak and in the Kattegat were low and dominated by small cells. The coccolithophorid Emiliania huxleyi was found with the highest cell numbers. The potentially toxic diatom genus Pseudo-nitzschia* was common at all stations along the west coast. The integrated chlorophyll concentrations were within normal for this month.
In the Baltic Sea sampling at RefM1V1 had to be cancelled due to military exercise. In general, both cell numbers and species diversity were low on all Baltic stations, except at BY2 where the diatoms Cerataulina pelagica and Dactyliosolen fragilissimus were found in high cell numbers. The low cell numbers at the Baltic stations were also visible in the chlorophyll concentrations, which were normal or below normal for this month, except at BY2 where there were high integrated chlorophyll concentrations.