By Kate Harries WaterWatch
An expert report just released by the Ontario government on how to respond to the effects of climate change in Ontario calls for a comprehensive strategy to “enhance the resilience of the Great Lakes.”
Climate projections show average temperatures in the Great Lakes basin rising between 2 and 4 degrees Celsius by 2050, and precipitation may increase by 20 per cent in all but the summer months when more intense dry periods are expected, says the ‘Adapting to Climate Change’ report.
Water temperatures may increase by as much as twice the air temperature, leading to increased evaporation, a fall in lake levels of between 15 and 115 cm over the next 40 years, and more hospitable conditions for invasive species, nuisance algae, pathogens and waterborne diseases.
The effect will be exacerbated by contaminants discharged from sewage treatment plants or washed from fertilized and disturbed areas into increasingly shallow and warm near-shore areas, the report predicts
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