Quoted: Those changes can already be seen clearly by examining lake ice, said Steve Vavrus, a senior scientist at the University of Wisconsin-Madison’s Center for Climatic Research.
Scientists studying Wisconsin’s inland lakes are able to collect a wealth of information on Madison’s lakes Mendota and Monona, whose ice records stretch back close to 170 years. Lakes have ice cover for about a month less now than they did when the records began, researchers estimate.
Out of Lake Mendota’s long ice record, the five years with the longest stretch of ice cover all occurred during the 1880s or earlier, and the five years with the shortest ice cover have all been since the 1980s, Vavrus said. It “really is a very different winter climate that we’re living in nowadays compared to over a century ago,” he said.
“I think what we’re seeing is people are pushing in at the limits of the edges of the season where it is potentially more dangerous,” said Titus Seilheimer, fisheries outreach specialist for the Wisconsin Sea Grant.