Fig. 2: Historical trends in river heatwaves.
From: Persistent river heatwaves are emerging worldwide under climate change
Spatial distribution of the historical trends in the average duration (a) and intensity (c) of global river heatwaves from 1976 to 2005, with their density distributions shown in the embedded charts of (a, c). The historical long-term trends are estimated by Theil-Sen’s slope estimator. Latitudinal averages of the long-term trends in river heatwave duration (b) and intensity (d), with blue scatter points representing the trends for individual rivers. Basemaps in a and c are from Natural Earth (https://www.naturalearthdata.com).
