Did Ja Know?
by Sea Grant Staff
Since 1973, Lake Superior's ice coverage declined by 79%. Lake Ontario is even less icy, having lost 88% of its total overall ice in 38 years. Great Lakes ice cover varies widely in response to natural climate, making it difficult to predict how much ice to expect in a given year.
Source: Wang, J., Bai, X., Hu, H., Clites, A., Colton, M., and Lofgren, B. 2011. Temporal and spatial variability of Great Lakes ice cover, 1973–2010. Journal of Climate (doi: http://dx.doi.org/10.1175/2011JCLI4066.1)