Fig. 2: Changes in flood generation processes in four European regions.
From: Shifts in flood generation processes exacerbate regional flood anomalies in Europe
a Changing annual frequency (smoothed using a kernel with a bandwidth of 7 years) of flood generation processes in the four European regions considered in this study: Northern (NORTH), Atlantic (ATL), Mediterranean (MED) and Central-Alpine (CENTR) (see Supplementary Fig. 3 for the location of the gauges) from 1960 to 2010. n is the number of catchments considered in each region. b Portion of catchments in each of the four regions with significant positive and negative trends (Mann–Kendall test, α = 0.05) in the frequency of each flood generation process (see Fig. 1 for trends in individual catchments). n is the number of catchments in each region that were analysed for each flood generation process, this number varies because only catchments with at least five flood events generated by a respective process were considered for trend analysis (see “Methods” section).
