Comparison between the observed and modelled physical properties. The comparison is between the observed and modelled start of the sea-ice seasons (upper panels), end of the sea-ice seasons (middle panels) and maximum sea-ice thicknesses (lower panels) at Rötttä (left), Hailuoto (center), and Märäskär (right) sea-ice stations for the time period 1991–2007. DOI: https://doi.org/10.1525/elementa.223.f3