70 Winter Figure 6.6. Variation of the number of days with ice at the Ueckermunde station (Szczecin Lagoon) in the period 1929-2000 Figure 6.7. Variation of 10-year mean values of the number of days with ice at the Ueckermunde station (Szczecin Lagoon) in the period 1929-2000 5-year low-pass filtering ““ 10-year low-pass filtering Winter Figure 6.8. Variation of maximum ice thickness at the Ueckermunde station (Szczecin Lagoon) in the period 1947-2000