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Record low sea levels in the Baltic Sea – Will there be a major inflow of saltwater from the North Sea?

Photo of turbulent waves on the Baltic Sea during stormy weather.
The Baltic Sea currently has its lowest average water level since records began 140 years ago. These are exceptionally good starting conditions for a possible large inflow of saltwater from the North Sea into the Baltic Sea. (Photo: R. Prien / IOW)

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 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.

 

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