The dip of Arctic air into the Midwest expanded ice coverage across all 5 Great Lakes, some seeing greater increases than ...

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

Data, maps, and reports are available at the lake-level (Great Lakes), for each state ... and Wisconsin Departments of Natural Resources (DNR) who helped us by providing access to fishing license and ...

Our mission is to improve the understanding of the Great Lakes ecosystem, including the physical, biological, and chemical processes that shape it, as well as the social and political forces that ...