More than 13,000 droughts spanning years have overwhelmed our planet across nearly four decades. These severe droughts are becoming hotter, longer and more devastating as our planet’s global temperature increases, new research has found.
Some of the worst drought effects appear in grassland areas — such as in eastern Australia as well as in the western United States, where Los Angeles is battling a spate of deadly and destructive wildfires. Additionally, researchers recently identified thousands of other multiyear droughts that may be overlooked on a global scale.
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Still, assessing multiyear droughts and changes to them “nevertheless remains a challenge,” in part because of uncertainties in data and relatively limited information about soil moisture, said climate researcher Jason Smerdon, a professor at Columbia University who was not involved in the study.