EFFECTS OF TRANSIENT PERTURBATIONS IN PHYSICAL EROSION RATES ON CHEMICAL EROSION RATES (Invited Presentation)
This model predicts that changes in W lag changes in E by a time that scales linearly with a characteristic regolith production time and inversely with a characteristic mineral dissolution time. As a consequence of the lag between W and E, a hysteresis develops in plots of W versus E during transients in E, which results in a positive relationship between W and E over some periods of time, a flat relationship at other times, and a negative relationship at other times. To the extent that this reflects the behavior of chemical erosion rates in nature, this implies that a variety of relationships between W and E can be generated by a single perturbation in E, even in the absence of changes in other factors that affect W, such as climate, biota, or lithology. This behavior may aid interpretation of measurements of W and E based on regolith geochemistry and fluxes of fluvial sediment and solutes.