Scientists Race to Gather Winter Data on Warming Great Lakes 
By JOHN FLESHER US Source: Associated Press 2/3/2022
JOHN FLESHER
Credit: AP Photo/ Roger Schneider) The Associated Press
What's happening in the Great Lakes during those long, frigid months when they're often covered partially or completely with ice? A casual observer — and even experts — might be inclined to say, “Not much.”

Lake scientists have long considered winter a season when aquatic activity slows. Most do their field studies at other times of year.

But researchers now think more is going on in the bitter depths than previously believed — including activity influenced by climate change. To learn more, teams will venture onto the frozen surfaces of all five lakes this month to collect water samples and other information from below the ice.

“We've been ignoring winter on the Great Lakes for so long,” said Ted Ozersky, a lake biologist with the University of Minnesota Duluth, who announced the “Winter Grab” expedition Thursday.
 

“There are lots of ways in which ice and winter conditions can affect the ecosystem. We don’t fully understand all of them. We have a general idea of how it should work but in many cases we haven’t done the footwork to see,” Ozersky said.

Crews from more than a dozen U.S. and Canadian universities and government agencies will make their way onto frozen sections of lakes Erie, Huron, Michigan, Ontario and Superior during the week of Feb. 14. That's typically around the time of maximum ice cover.

They'll take what Ozersky described as a midwinter “snapshot,” measuring characteristics such as light levels at different depths, water movement and the presence of carbon, bacteria and nutrients that feed fish but also can damage the environment.

 
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