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Climate change is driving rapid shifts between high and low water levels on the Great Lakes

University of Michigan experts say the rapid transitions between extreme high and low water levels in the Great Lakes represent the “new normal.”

Written by: ejolsen

June 4, 2019

By Ricky Rood & Drew Gronewold

The North American Great Lakes contain about one-fifth of the world’s surface fresh water. In May, new high water level records were set on Lakes Erie and Superior, and there has been widespread flooding across Lake Ontario for the second time in three years. These events coincide with persistent precipitation and severe flooding across much of central North America.

As recently as 2013, water levels on most of the Great Lakes were very low. At that time some experts proposed that climate change, along with other human actions such as channel dredging and water diversions, would cause water levels to continue to decline. This scenario spurred serious concern. Over 30 million people live within the Great Lakes basin, and many depend directly on the lakes for drinking water, industrial use, commercial shipping and recreation.

But since 2014 the issue has been too much water, not too little. High water poses just as many challenges for the region, including shoreline erosion, property damage, displacement of families and delays in planting spring crops. New York Gov. Andrew Cuomo recently declared a state of emergency in response to the flooding around Lake Ontario while calling for better planning decisions in light of climate change.

This article is republished from The Conversation. Read the original article.

Explore: Climate and Space Sciences and Engineering Climate Change Drew Gronewold Richard Rood

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