33 
0 5 10 15 20 25 30 35 40 45 50 
Sum of coldness in °C 
Figure 3.4. Dependence of the ice thickness on the sum of coldness (Kamin, Szczecin 
Lagoon, 1961-1990) for the mild ice winters 
40 
35 
30 
Figure 3.5. Dependence of the ice thickness on the sum of coldness (Kamin, Szczecin 
Lagoon, 1961-1990) for the moderate ice winters