Yale Environment 360
On the North American Great Lakes, ice cover usually peaks in late February or early March. But currently, the lakes are nearly ice-free.
Typically in late winter, ice sprawls across more than 40 percent of the lakes, but at present, ice cover stands at just around 4 percent. For the past half-century, ice cover has trended down as winters have grown warmer, declining by a quarter on average since 1973. Click here to continue reading