The authors acknowledge the important contribution of the Canadian weekly ice thickness observing program to this paper and the Canadian Ice Service for maintaining these data online (http://ice-glaces.ec.gc.ca/ Ice Archive, Ice Thickness). We also thank Diane Lavoie and Oleg Saenko for helpful comments on a draft version of the manuscript. This research was funded under Project 4.1 of the integrated natural/medical/social study of the changing coastal Canadian Arctic (ArcticNet) NCE.
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