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

2004200520062007200820092010

Break-up (start)0.840.910.910.950.850.910.92
Mean ice-off 0.890.920.920.970.930.950.97
WCI 0.870.910.860.960.910.940.95

Freeze-up (start)0.480.560.460.790.570.710.43
Mean ice-on 0.620.640.630.800.490.750.44
CFO0.550.550.570.720.410.630.31