"Report: Great Lakes Winter Ice Cover Has Decreased 71% Since 1973"
"The average amount of ice covering the Great Lakes declined 71 percent over the past 40 winters, with Lake Superior ice down 79 percent, according to a report published by the American Meteorological Society.
'There was a significant downward trend in ice coverage from 1973 to the present for all of the lakes,' states the study appearing in the society’s Journal of Climate.