Fig. 2: Dependence of the uncertainty due to internal climate variability on the sample size.
From: Advancing research on compound weather and climate events via large ensemble model simulations
a Relative uncertainty due to internal climate variability in the frequency of univariate hot events fH (orange) and compound hot-dry events fHD (solid green). Dashed and dotted green lines show the relative uncertainty in fHD for grid points with the 35% strongest and weakest coupling, respectively (see Methods). Relative uncertainty is defined as the ratio of twice the standard deviation to the mean of the frequency f across ensemble members averaged over global landmasses (see Methods). b As in a, but for the frequency of wind extremes (fW, orange) and concurrent precipitation and wind extremes (fPW, green). c As in a, but for the frequency of a single-year soil moisture drought (f1YD, orange), two (f2YD, green) and three (f3YD, purple) consecutive annual soil moisture droughts, respectively. The climate models and the definitions of the extremes are the same as in Fig. 1.
