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The impacts of differently-evolving SST and ice cover distributions should be considered when comparing different forecasts, even when they are from the same data time.

Fig2148.AFig2.1.4.8-1: Sequence of sea-ice and sea-surface temperatures from the ENS CTRL run data time 00 _UTC 27 April 2017.   T+0hr (00UTC 27 April 17), T+120hr (00UTC 02 May 17),  T+240hr (00UTC 07 May 17), and  T+360hr (00UTC 12 May 17).  On such plots the climatological average sea ice cover is shown in pink (contour and stippling, for >50%), just discernible in the northern Gulf of Bothnia and in the White Sea.   Dark purple areas (SST between 0C and -2C) are prone to ice formation if not already in existence.   Areas of sea ice are shown as turquoise. 

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