ijsbedekking op de Baltische zee geweest. Bron: Finnish Meteorological Institute.
Daily ice extent on the Baltic Sea ( km² ).The blue envelope curves show the largest and smallest ice extents (min–max) and fractiles (25 %–75 %) of the ice seasons 2007–2020. The green line (50 %) is the median extent of the seasons 2007–2020. The black dotted line is the previous ice season's (2020–2021) ice extent, and the solid black line is the current ice season's (2021–2022) extent.