 This study examined the relationship between climate, vegetation and soil properties and their effect on long-term hydrologic partitioning at the catchment level. It was found that catchments with longer subsurface storage release timescales produced more of apotranspiration, ET than those with shorter timescales. Additionally, climates that tend to produce more ET were associated with catchments with vegetation with lower light use efficiency and higher root fraction. These results suggest that there is a strong interaction between climate, vegetation, and soil properties that can lead to specific hydrologic partitioning at the catchment scale. This article was authored by P. A. Trock, G. Carrillo, M. Sevaplin, and others.