As executive director of the Great Lakes Observing System, she’s leading a campaign to map every meter of the lakes’ bottom.

The Great Lakes are an amazing natural resource that ... In Figure 2 below, the map on the left of each image shows how much colder or warmer than normal the air temperature was for the winter ...

To that end, the nonprofit Great Lakes Observing System, or GLOS, is asking ice fishing anglers and others who go out on the ice to gather and submit measurements of thickness, as well as observations ...

When the Great Lakes Water Quality Agreement was passed in the 1970s, eutrophication was the big problem. Eutrophication occurs when too many nutrients enter a body of water, increasing the amount of ...

Lake effect snow is dependent on the Great Lakes water temperature and how much of the lake is frozen. But what does the current ice concentration look like and ...