Table 1: Spearman correlation () values for 189 lakes identified with both IMS and MODIS pixels. All values are significant at the 0.001 level.

2004 2005 2006 2007 2008 2009 2010 Break-up (start) 0.84 0.91 0.91 0.95 0.85 0.91 0.92 Mean ice-off 0.89 0.92 0.92 0.97 0.93 0.95 0.97 WCI 0.87 0.91 0.86 0.96 0.91 0.94 0.95 Freeze-up (start) 0.48 0.56 0.46 0.79 0.57 0.71 0.43 Mean ice-on 0.62 0.64 0.63 0.80 0.49 0.75 0.44 CFO 0.55 0.55 0.57 0.72 0.41 0.63 0.31