Seasonal and long term variation 
17 
sea level in cm sea level In cm 
Wismar Warnemünde 
year year 
Sassnitz 
Ôwinoujécie 
Kotobrzeg 
year 
Fig. 3.1. a Minimum sea level, annual mean and median sea level; values below which sea levels fell for 24, 72 and 240 
consecutive hours at the Wismar, Warnemünde, Sassnitz, Swinoujsie and Kotobrzeg gauges.