♦ First ice 
Average first ice ♦ Last ice 
Average last ice 
86 
o 
Csl 
CO 
m 
CO 
r- 
CO 
CD 
O 
t— 
Csl 
CO 
CT> 
CD 
CD 
CD 
CD 
CD 
CD 
CD 
CD 
CD 
o 
o 
o 
o 
o 
CD 
CD 
CD 
CD 
CD 
CD 
CD 
CD 
CD 
CD 
o 
o 
o 
o 
o 
T- 
T- 
T- 
T- 
T- 
T- 
T- 
T- 
T- 
T- 
Csl 
Csl 
Csl 
Csl 
Csl 
Ice winter (1991 =1990/91) 
Figure 9.7. Beginning of freezing and end of ice season in Szczecin Lagoon in moderate ice winters 
♦ Karnin ▲ Kamminke ■ Ueckermunde Average number of the days with ice 
Ice winter (1991=1990/91) 
Figure 9.8. Number of days with ice in Szczecin Lagoon in moderate ice winters 
Eight mild ice winters occurred in the 13-year period studied. In the area of Szczecin Lagoon, they 
began mostly between late November and early January, but the last ice in almost all of the winters 
disappeared about two weeks earlier than is usually the case in mild winters. Accordingly, there were 
mostly fewer days with ice than usual. Only in two winters (1992/93 and 1997/98) was the normal 
value reached, and in the winter of 1998/99 it was exceeded by 10 days. 
In 4 normal ice winters, the ice lasted on average one week less than in normal ice winters in the 
1961-1990 period. Ice formation began about two weeks earlier than usual, and the last ice disap 
peared two weeks before the normal date. 
The winter of 1995/96 was the only strong ice winter in the period under review. It began two weeks 
earlier and ended two weeks later than an ice winter of average severity. The winter of 1995/96 was 
exceptionally long. On average 132 days with ice were recorded in Szczecin Lagoon. This value ex 
ceeds the normal value by 34 days and is close to the maximum value for this ice parameter. The ice 
winter of 1995/96 thus was one of the longest ones in the period from 1960 (see Figures 9.9 and 
9.10).