Maybe the future won’t be so dire after all. These authors find “little evidence to suggest [that] the generally positive scaling of precipitation in extratropical and temperate climates is replicated in streamflow.” The exception is for small catchments and urban areas where the effects of soil moisture and depression storage are more negligible. This is because losses, particularly from soil moisture, offset the expected increases in storm intensities. The bad news is that this infers drying in natural catchments and flooding in small urban catchments. When making generalizations about the future, scale matters.

https://www.nature.com/articles/s41598-017-08481-1

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