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Sediment yields from river basins are typically considered to be controlledby tectonic and climatic drivers. However, climate and tectonics can operatesimultaneously and the impact of autogenic processes scrambling or shreddingthese inputs can make it hard to unpick the role of these drivers from thesedimentary record. Thus an understanding of the relative dominance ofclimate, tectonics or other processes in the output of sediment from a basinis vital. Here, we use a numerical landscape evolution model (CAESAR) tospecifically examine the relative impact of climate change, tectonic uplift(instantaneous and gradual) and basin morphology on sediment yield.Unexpectedly, this shows how the sediment signal from significant rates ofuplift (10 m instant or 25 mm a−1) may be lost due to internal storageeffects within even a small basin. However, the signal from modest increasesin rainfall magnitude (10–20%) can be seen in increases in sedimentyield. In addition, in larger basins, tectonic inputs can be significantlydiluted by regular delivery from non-uplifted parts of the basin

Climate, tectonics or morphology: what signals can we see in drainage basin sediment yields?