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The warming in the deepest parts of the Great Lakes may be irreversible

The new research is published in the journal Nature Communications shows that the deepest parts of the Great Lakes are warming. Although it is known that global warming causes ice to melt and ocean temperatures to rise, little is said about the effects of climate change on deep lake waters.

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Research shows that the deepest parts of Great Lake have witnessed a steady rise in temperature over the past three decades. The researchers analyzed data for 30 years, including hourly temperature records in deep water. Temperature readings at 500 feet below Country the surface revealed a consistent increase. Researchers identified an average 0.11 ° F temperature increase per decade in the deep waters of Lake Michigan. Further, winter in the area has become shorter for the time in question.

Related: Nearly a third of freshwater fish are facing extinction

According to Eric Anderson, lead author of the study and a researcher at the National Oceanic and Atmospheric Administration (NOAA) at the Great Lakes Environmental Research Laboratory, changes in deep water temperatures are affecting come Biodiversity. Species such as white fish and golden perch are facing adverse effects from warmer waters.

“We can see a successful decline in fertility in some species over time with the increase in water temperature we see,” Anderson explained.

In lakes, there are seasonal currents, where warm water rises to the surface and cold water is pushed down. Through this process, oxygen and nutrients are released into the deep lake fish and other creatures. According to Anderson, the increased temperature affects this water cycle and as a result breaks the food web.

Warming can have far-reaching consequences for the ecology and economy of the areas surrounding the Great Lakes. Present, travel and the fishing industries here provide more than 1.3 million jobs and are worth $ 82 billion in wages, most of which could be lost. Meanwhile, millions of people rely on the Great Lakes for their drinking water, but warming can also cause an increase in toxic algae blooms. Unfortunately, the impacts on lake biodiversity and the region’s economy could be permanent.

As Anderson explained, “Once we got past that point, we affected everything on an ecological level without necessarily reversing it.”

+ Nature Communications

Through Grist

Picture over David Mark



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