Ups and Downs (IMAGE)

Columbia Climate School

Ups and Downs

Caption

Varying soil moisture in southwestern North America, 800-2018. The straight horizontal center line indicates average moisture; blue line at bottom shows 2000-2018 mean. Green bars indicate abnormally wet periods, pink ones abnormally dry. The fluctuating red moisture line is based on tree-ring data until it converts to blue at the start of modern instrumental observations.

Credit

Adapted from Williams et al., Science, 2020

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