Scientists can now see the big picture on water globally — which areas are repeatedly drying and which are getting hammered by extra-strong rainstorms, thanks to new analysis of satellite data.
FILE - People travel by boat in a flooded street in Trizidela do Vale, state of Maranhao, Brazil, May 9, 2009. The intensity of extreme drought and rainfall has sharply increased over the past 20 years, according to a study published Monday, March 13, 2023, in the journal Nature Water.
“I have a feeling when future generations look back and try to determine when humanity really began understanding the planet as a whole, this will be one of the studies highlighted," he said. Researchers looked at 1,056 events from 2002-2021 using a novel algorithm that identifies where the land is much wetter or drier than normal.
Drought events outnumbered heavy rain events by 10%. Their geographic extents and how long they lasted were similar. “Looking forward into the future, in terms of managing water resources and flood control, we should be anticipating that the wetter extremes will be wetter and the dry extremes will get drier,” said Richard Seager, a climate scientist at the Lamont Doherty Earth Observatory at Columbia University, who was not involved with the study.
A drastic swing between extreme drought and unprecedented flooding, dubbed “weather whiplash,” is becoming common in some regions.
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