Fig. 1: Analytic solutions showing \({E}({D})\) vs. the Coefficient of Variation (CoV).
From: Improved estimates of future precipitation change in climate models

For a EFC = 0 (so \({D}={D_{0}}\)) and the number of years in the reference period = 10, 20, 30, 40 years, and for b EFC = 0, and EFC = ±50% of \({\mu }_{1}\) with the number of years in reference period = 20.