Extended Data Fig. 9: Extended drought events.
From: Rapid intensification of the emerging southwestern North American megadrought in 2020–2021

Summer soil moisture anomalies, expressed as standard deviations from the 800–2021 mean (σ), during the longest 8 extended drought events during the 800–2021 study period. The pink background bounds the years of each extended drought event. The horizontal dotted black line represents the 800–2021 mean. For the first 7 droughts shown, soil moisture anomalies come from our tree-ring reconstruction. For the final drought (2000–2021), anomalies come from our observation-based record.