New research: Enhanced winter, spring, and summer hydroclimate variability across California from 1940 to 2019
California’s recent hydroclimatic pivots have caused billions of dollars in damages with the potential to become more extreme in the future, even if the mean total precipitation and streamflow do not change. … Our analysis shows that there is a statistically significant positive trend in precipitation variability that is driven by long-term increases to the 90th percentile through most of California during winter (January–March), which has been steadily increasing since the mid-20th century.