Extended Data Fig. 1: Spatial and temporal coverages of the streamflow records.

a | Spatial coverage of the 3049 catchments used herein. b | Spatial distribution of areas where the 1950–2020 mean annual snowfall fraction exceeded 0.1 over the Northern Hemisphere. c | Histogram of data length for the 3049 catchments. Numbers in c above each column indicate the count of catchments falling into each category.