Human-caused climate change made the record-smashing 2020 Atlantic hurricane season even wetter
all caused more than $1 billion in damage, much of it from flooding. Laura, for example, was 10% wetter than it would have been without climate change, a separate quick analysis shows, Reed said.
The researchers used computer simulations -- continually updated with real-time observations -- to calculate how much water fell during the 30 storms and then compared them to a simulated world with no human caused climate change from the burning of coal, oil and natural gas. The difference is what's caused by global warming. ThisWhen scientists looked at just the three rainiest hours of each storm, climate change amped them up 8% compared to the mythical world without climate change.
A fundamental rule of physics is that the atmosphere can hold nearly 4% more moisture for every degree Fahrenheit the air warms . Globally, temperatures have increased about 2 degrees since pre-industrial times. And the water of the Atlantic hurricane basin, which acts as storm fuel, has warmed about 1.3 degrees in the past century, Wehner said.Storms are getting stronger, which also makes them wetter, Wehner said.
“The expected increase in hurricane rainfall is probably the most robust prediction concerning the response of hurricanes to climate change,” said MIT atmospheric science professor Kerry Emanuel, who wasn’t part of the study team. But the study is limited by not looking at how climate change could have affected storm track, intensity and frequency, he said.
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