19 
water level in cm RosfcOCfc 
Fig. 4.2. Water level oscillations of about 0.5 m / h in the Warnow estuary at Rostock 
Wismar 
Fig. 4.3. Example of regular semidiurnal tides at the Wismar gauge from 10-14 August 2000 
As has been pointed out above, the westernmost basins of the Baltic Sea have clearly 
distinguishable tides. Their amplitude reaches about 15 cm and diminishes toward the east. 
Tides in the central part of the Baltic Sea are negligibly small, and their amplitude hardly 
reaches 3-5 cm. It has been assumed that these oscillations are caused by the North Sea 
tides.