Searing heat waves detailed in study of future climate

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https://www2.ucar.edu/atmosnews/news/19559/searing-heat-waves-detailed-study-future-climate

[font face=Serif][font size=5]Searing heat waves detailed in study of future climate[/font]

February 23, 2016

[font size=3]Sweltering heat waves that typically strike once every 20 years could become yearly events across 60 percent of Earth's land surface by 2075, if human-produced greenhouse gas emissions continue unchecked.

If stringent emissions-reduction measures are put in place, however, these extreme heat events could be reduced significantly. Even so, 18 percent of global land areas would still be subjected yearly to these intense heat waves, defined as three exceptionally hot days in a row.

These are among the findings of a new study by Claudia Tebaldi of the National Center for Atmospheric Research and Michael Wehner of the Lawrence Berkeley National Laboratory. The study, funded by the U.S. Department of Energy and published in the journal Climatic Change, quantifies the benefits society would reap, in terms of avoiding extreme heat events, if action is taken now to mitigate climate change.

"The study shows that aggressive cuts in greenhouse gas emissions will translate into sizable benefits, starting in the middle of the century, for both the number and intensity of extreme heat events," Tebaldi said. "Even though heat waves are on the rise, we still have time to avoid a large portion of the impacts."

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