Tech

Climate change has caused the Northwest heat wave to blow 150 times more likely

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Yes, it blames climate change.

Man-led climate warming has fueled that heat wave it probably killed hundreds of people last week across the Pacific Northwest of the United States and Canada.

The massive accumulation of greenhouse gases in the atmosphere has made the unprecedented meteorological event 150 times more likely, according to an analysis by World Meteorological Award. U slightly affiliated team of world scientists he concluded that the extreme heat wave would have been “virtually impossible” without climate change, which has already warmed the planet by about 2.2 ˚F (1.2 ˚C).

Scientists have long resisted applying any single meteorological event to climate change, keeping to the general point that it would make heat waves, droughts, fires and hurricanes more frequent and severe. But more satellite data records, increased computing power, and higher-resolution climate simulations have made researchers safer to say, often in a few days, that global warming has raised many probabilities of specific disasters. (To see 10 Advanced Technologies 2020: Attributing Climate Change.)

Extreme temperatures last week demolished all-time heat records in cities and towns across the region, it has shaken up power to tens of thousands of homes, and puts more than 2,000 people in emergency rooms for heat-related illnesses in Washington and Oregon.

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So far, officials have reported more than 100 heat-related deaths in these states, according to him assorted media. In addition, there were nearly 500 “sudden and unexpected deaths” in British Columbia, about 300 more than normal during the relevant five-day period.

The most likely scenario is that higher global temperatures will have simplified only the consequences of the unusual atmospheric conditions that occurred last week, when a so-called dome of heat trapped hot air over a vast stretch of the region. If so, similar events can happen once or twice a decade if temperatures rise by 3.6 ˚F (2 ˚C), the researchers found.

The most disturbing possibility, albeit more subtle, is that greenhouse gas emissions have pushed the climate system past some unknown and poorly understood thresholds, where global warming is now triggering stronger increases in extreme temperatures than expected. This theory will require further research to evaluate. But it meant that strong heat waves would exceed the levels predicted by current climate models, the researchers say.

“You’re not supposed to beat records from four or five degrees Celsius (seven to nine degrees Fahrenheit),” said Friederike Otto, co-director of World Weather Attribution and associate director of the University’s Institute for Environmental Change. Oxford, in a statement. . “This is an exceptional event that we cannot rule out the possibility that we are experiencing heat extremes today as we only expect to come to higher levels of global warming.”

Another heat wave is expected to bring temperatures in triple numbers in parts of the Northwest in the coming days.


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