“We now have enough observations of current drought and tree-ring records of past drought to say that we’re on the same trajectory as the worst prehistoric droughts.”
The western United States is likely being gripped by an “emerging” megadrought partly fueled by the climate crisis, says a study published Friday.
Researchers claim the region’s 19-year drought, from 2000–2018, already rivals that of any over the past 1,200 years.
“We’re no longer looking at projections, but at where we are now,” said lead author Park Williams, a bioclimatologist at Columbia University’s Lamont-Doherty Earth Observatory, in a statement. “We now have enough observations of current drought and tree-ring records of past drought to say that we’re on the same trajectory as the worst prehistoric droughts.”
For the study, published in the journal Science, Williams and the other researchers looked at nine U.S. states, stretching from Oregon and Montana at the northern and southward through California and New Mexico. The researchers also included a portion of northern Mexico in the study.
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