A pair of researchers with Climate Research Division, Environment and Climate Change in Canada has found evidence that shows human activities have been contributing to an increase in extreme rainfall events in North America. In their paper published in Proceedings of the National Academy of Sciences, Megan Kirchmeier-Young and Xuebin Zhang describe their study, which involved an analysis of climate data and use of computer models to demonstrate the impact of global warming on extreme rainfall events across North America.
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Source: Phys.org