Climate Shocks Are Transforming the Great Lakes
The Great Lakes are experiencing more frequent and intense heat waves and cold spells than ever before, according to new research from the University of Michigan. These extreme temperature events have surged by over 100% since 1998, coinciding with one of the strongest El Niño events on record.
Modeling Eight Decades of Data
Researchers developed advanced models to trace surface temperature changes back to 1940. These models reveal how extremes are altering not just the weather patterns in the region, but also the ecological balance and economic activities dependent on the lakes.
Impact on Ecosystems and Economy
The Great Lakes fishing industry, valued at over $7 billion annually, faces serious risks. Sudden temperature shifts can damage fish eggs and disrupt species’ habitats. These shocks also interfere with the lakes’ natural mixing cycles, affecting both water quality and drinking water supplies.
Looking Ahead
By linking these trends with global phenomena such as El Niños and La Niñas, scientists hope to forecast future events and develop protective strategies for communities and industries around the lakes.
The study, conducted by the Cooperative Institute for Great Lakes Research (CIGLR), appears in Communications Earth & Environment and was supported by the NSF Global Centers program and NOAA.
