Spatial and temporal patterns of precipitation concentration and their associated risks.

A positive trend indicates that precipitation is becoming more concentrated, reflecting the phenomenon of “wet days getting wetter and dry days getting drier,” while a negative trend suggests a shift toward more evenly distributed precipitation, reflecting the phenomenon of “wet days becoming drier and dry days becoming wetter” (Supplementary Figure S2).

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Using this approach, we found that 67.4% of the global land surface exhibited an increasing trend in precipitation concentration over time.

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