CLEVELAND, Ohio — For the second day in a row, the Great Lakes are at a combined ice cover low.
On Feb. 13, the combined ice cover across the Great Lakes was 7.3%, breaking the old record from 2002. The historical average for ice cover season-to-date is 40%.
Between 1973 and 2010, ice on the Great Lakes altogether declined 71%. Lake Ontario went down by 88%, Superior by 79%, and Michigan not far behind, recording a 77% ice loss over the 38-year timeframe. Lake Huron declined 62%, and Erie at 50%. In other words, the extreme from one year to the next is getting bigger and more frequent, which is an impact of climate change. That means even though this year is breaking records for low ice extent, next year or the year after could break records for max ice extent.Low ice coverage has a wide range of impacts across industries and communities.
Lower ice extent also means more evaporation, which means lower water levels. Not only does lower water levels negatively affect the commercial shipping industry, it can also affect hydroelectric plants, reducing their energy production -- a cost that will trickle down to consumers when other means of energy production become necessary.
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