4.3 Case 3: Spatially Uniform to Bottom-heavy
In this scenario, we model the catchment response to a change in rainfall pattern from spatially uniform 1.5 m/yr to a gradient that decreases upstream from 4 to 0.5 m/yr, resulting in a complex transient response. Mean rainfall increases by ~80%, which remarkably also drives a 30% increase in fluvial relief that contrasts with the 25% decrease expected for a spatially uniform increase in rainfall of the same magnitude (Figure 3b; Movie S3).