In the vast Colorado River basin, climate change is driving extreme, interconnected events among earth-system elements such as weather and water.
In the vast Colorado River basin, climate change is driving extreme, interconnected events among earth-system elements such as weather and water. These events are becoming both more frequent and more intense and are best studied together, rather than in isolation, according to new research.
“We found that concurrent extreme hydroclimate events, such as high temperatures and unseasonable rain that quickly melt mountain snowpack to cause downstream floods, are projected to increase and intensify within several critical regions of the Colorado River basin,” said Katrina Bennett, a hydrologist at Los Alamos National Laboratory and lead author of the paper in the journal Water. “Concurrent extreme events of more than one kind, rather than isolated events of a single type, will be the ones that actually harm people, society, and the economy.”
Another example of concurrent hydroclimate events might be low precipitation accompanied by high temperatures, which cause drought as an impact. Other factors such as low soil moisture or wildfire burn scars on steep slopes contribute to impacts.
“You never have just a big precipitation event that causes a big flood,” Bennett said. “It results from a combination of impacts, such as fire, topography, and whether it was a wet or dry summer. That’s the way we need to start thinking about these events.”
Read more at DOE/Los Alamos National Laboratory
Photo Credit: Roselie via Pixabay