Very important for fish ecology:
Record low sea levels in the Baltic Sea – Will there be a major inflow of saltwater from the North Sea?
Press release from Leibniz-Institut für Ostseeforschung Warnemünde 06.02.26 (via IDW-online):
Since the beginning of January, an unusually long period of easterly winds has caused the average water level in the Baltic Sea to fall to a historic low. Measurements at the Swedish Landsort-Norra gauge show values that are the lowest since records began in 1886. Researchers at the Leibniz Institute for Baltic Sea Research Warnemünde (IOW) are currently monitoring this development very closely, as it represents a rare oceanographic situation that could lead to a large inflow of saltwater from the North Sea into the Baltic Sea. An inflow of this kind could significantly affect the physical and chemical conditions in the deep basins of the Central Baltic Sea.