Going through the nutrient data from the Baltic Proper, it seems like it could be a year with a lot of bluegreen algal blooms. All the inorganic nitrogen has been depleted, but relatively high phosphate concentrations remain in the surface water. However, other factors such as the weather conditions during May, June and July will determine how much bluegreen algae there will be during summer.
We have had some stations with visible blooms of bluegreen algae already. These have accumulated at the surface during the last two days when it has been sunny and calm. Today there is more wind and they will be mixed to deeper water layers.
Concentration of PO4 in µmol per liter in the surface water
The molar NP ratio in the surface water
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